@article{MTMT:34788598, title = {Bond shear modulus in reinforced concrete at high temperature: A design‐oriented approach}, url = {https://m2.mtmt.hu/api/publication/34788598}, author = {Bamonte, Patrick and Gambarova, Pietro G. and Lo Monte, Francesco}, doi = {10.1002/suco.202300160}, journal-iso = {STRUCT CONCRETE}, journal = {STRUCTURAL CONCRETE}, volume = {4}, unique-id = {34788598}, issn = {1464-4177}, abstract = {Modeling bond behavior in either ordinary or high‐temperature conditions requires the knowledge of bond shear modulus—called also slip modulus or simply bond stiffness —that has received so far scanty attention because of the greater interest for bond as a guarantee of equilibrium at the Ultimate Limit State (and in fire conditions) than as a means to guarantee both equilibrium and compatibility at the Serviceability Limit State (and in fire/post‐fire conditions). The limited knowledge of bond shear modulus makes it difficult to numerically model such phenomena as tension stiffening, that controls the structural behavior in both ordinary and fire conditions. The general trends identified by examining eleven experimental campaigns with anchored bars covering 27 different cases and temperatures ranging between 20 and 800°C are the starting point of the design‐oriented laws proposed in this study about bond shear modulus as a function of concrete residual strength and temperature. A simple shear‐lag model is introduced for bond shear modulus at room temperature, as its evaluation from test data is no simple matter due to initial chemical adhesion and different test procedures. Bond shear modulus is shown to be a decreasing function of concrete residual compressive strength and of the maximum temperature reached by the bar‐concrete system. Design charts are proposed to allow the designer to identify the value of the bond stiffness on the basis of the max. temperature, of concrete residual strength and of bar diameter, making it possible to realistically model tension stiffening in fire‐damaged RC structures.}, year = {2024}, eissn = {1751-7648}, pages = {1}, orcid-numbers = {Bamonte, Patrick/0000-0002-4967-1089; Lo Monte, Francesco/0000-0003-4397-6591} } @article{MTMT:34753408, title = {Bond between deformed steel rebars and concrete at elevated temperatures}, url = {https://m2.mtmt.hu/api/publication/34753408}, author = {Banoth, Ira and Agarwal, Anil}, doi = {10.1016/j.firesaf.2024.104133}, journal-iso = {FIRE SAFETY J}, journal = {FIRE SAFETY JOURNAL}, volume = {3}, unique-id = {34753408}, issn = {0379-7112}, year = {2024}, eissn = {1873-7226}, pages = {104133}, orcid-numbers = {Agarwal, Anil/0000-0002-3902-4304} } @article{MTMT:34520524, title = {Experimental study of bond performance of corroded reinforcement in concrete under various cooling methods}, url = {https://m2.mtmt.hu/api/publication/34520524}, author = {Liu, Caiwei and Zheng, Jianxin and Ning, Ning and Yan, Liangtai and Zheng, Chunying}, doi = {10.1016/j.jobe.2024.108569}, journal-iso = {J BUILDING ENG}, journal = {JOURNAL OF BUILDING ENGINEERING}, volume = {84}, unique-id = {34520524}, year = {2024}, eissn = {2352-7102} } @article{MTMT:34575510, title = {Study on bond-slip between reinforcing bar and concrete during transient pull-out test under fire}, url = {https://m2.mtmt.hu/api/publication/34575510}, author = {Liu, Caiwei and Qiu, Ziwen and Wu, Qingdong and Yan, Liangtai and Han, Yanqing and Miao, Jijun and Ba, Panfeng}, doi = {10.1016/j.istruc.2024.105992}, journal-iso = {STRUCTURES}, journal = {STRUCTURES}, volume = {61}, unique-id = {34575510}, issn = {2352-0124}, year = {2024}, eissn = {2352-0124}, orcid-numbers = {Liu, Caiwei/0000-0001-7124-5855} } @article{MTMT:34063708, title = {Cyclic bond behavior in reinforced concrete flexural members exposed to elevated temperatures}, url = {https://m2.mtmt.hu/api/publication/34063708}, author = {Asghari Ghajari, Farjam and Yousefpour, Hossein}, doi = {10.1016/j.engstruct.2023.116520}, journal-iso = {ENG STRUCT}, journal = {ENGINEERING STRUCTURES}, volume = {292}, unique-id = {34063708}, issn = {0141-0296}, year = {2023}, eissn = {1873-7323}, orcid-numbers = {Yousefpour, Hossein/0000-0001-5454-6584} } @inbook{MTMT:32961350, title = {Bond Behaviour Between Steel Rebars and Concrete Under Elevated Temperatures-Eccentric Pullout Test}, url = {https://m2.mtmt.hu/api/publication/32961350}, author = {Banoth, Ira and Agarwal, Anil}, booktitle = {Advances in Structural Mechanics and Applications}, doi = {10.1007/978-3-031-05509-6_14}, unique-id = {32961350}, year = {2023}, pages = {171-179} } @article{MTMT:34044747, title = {Performance of circular concrete filled steel tubes after fire exposure: Experiments}, url = {https://m2.mtmt.hu/api/publication/34044747}, author = {Cao, Vui Van and Trinh, Thong Minh Nguyen}, doi = {10.1016/j.istruc.2023.06.110}, journal-iso = {STRUCTURES}, journal = {STRUCTURES}, volume = {55}, unique-id = {34044747}, issn = {2352-0124}, year = {2023}, eissn = {2352-0124}, pages = {1331-1341} } @article{MTMT:34076572, title = {Refinement simulation of bond-slip performance of deformed reinforced concrete exposed to fire: Parametric analysis}, url = {https://m2.mtmt.hu/api/publication/34076572}, author = {Li, Xiaoya and Zhang, Renbo and Jin, Liu and Du, Xiuli}, doi = {10.1016/j.conbuildmat.2023.132558}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {399}, unique-id = {34076572}, issn = {0950-0618}, year = {2023}, eissn = {1879-0526} } @article{MTMT:33833265, title = {Performance of Silica Fume on Preventing Strength Retrogression in Hardened Cement Paste and Mortar at Elevated Temperatures}, url = {https://m2.mtmt.hu/api/publication/33833265}, author = {Moffo, Ngaelle Dorivice N. and Mwero, John and Gariy, Zachary A.}, doi = {10.3390/buildings13051301}, journal-iso = {BUILDINGS-BASEL}, journal = {BUILDINGS}, volume = {13}, unique-id = {33833265}, abstract = {This study examines the effect of silica fume (SF) as a partial replacement for cement to prevent strength retrogression in hardened cement paste (HCP) and mortar at elevated temperatures. An experimental procedure was conducted on 320 specimens, replacing 0, 10, 20, and 30% of the cement by weight with SF. The residual compressive strength of the specimens was evaluated at room temperature (25 °C) and at 100, 200, 300, and 400 °C for 7, 28, and 56 days. The results indicate that the addition of SF to the cement paste and mortar improves the compressive strength both at 25 °C and at temperatures up to 400 °C. That is attributed to the formation of C-S-H phases, such as tobermorite and xonotlite. Additionally, the optimal residual compressive strength was achieved by adding 30% of SF. Therefore, XRD, SEM, and EDS techniques were employed to evaluate the microstructure of HCP specimens with 30% of SF. The results show that adding SF leads to a denser microstructure and lower porosity, resulting in more durable cement paste and mortar at ambient and elevated temperatures. In conclusion, using SF as a partial replacement for cement can be an effective way of developing sustainable fire-resistant construction materials.}, year = {2023}, eissn = {2075-5309}, pages = {1301} } @article{MTMT:34153280, title = {Effect of High Temperature Exposure on Bond Properties of Steel Deformed Rebar Embedded in Self-Consolidating Concrete Containing Copper Slag as Fine Aggregate}, url = {https://m2.mtmt.hu/api/publication/34153280}, author = {Nabahati, Farnam and Mousavi, Seyed Sina and Dehestani, Mehdi}, doi = {10.1061/JMCEE7.MTENG-16062}, journal-iso = {J MATER CIVIL ENG}, journal = {JOURNAL OF MATERIALS IN CIVIL ENGINEERING}, volume = {35}, unique-id = {34153280}, issn = {0899-1561}, year = {2023}, eissn = {1943-5533}, pages = {1}, orcid-numbers = {Mousavi, Seyed Sina/0000-0003-1367-7419; Dehestani, Mehdi/0000-0001-9609-4512} } @article{MTMT:34030235, title = {Experimental investigation on the performance of ground granulated blast furnace slag and nano-silica blended concrete exposed to elevated temperature}, url = {https://m2.mtmt.hu/api/publication/34030235}, author = {Singh, Harpreet and Kumar Tiwary, Aditya and Singh, Sandeep}, doi = {10.1016/j.conbuildmat.2023.132088}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {394}, unique-id = {34030235}, issn = {0950-0618}, year = {2023}, eissn = {1879-0526}, orcid-numbers = {Singh, Harpreet/0000-0003-3207-0188} } @article{MTMT:34493342, title = {Residual mechanical properties of concrete incorporated with nano supplementary cementitious materials exposed to elevated temperature}, url = {https://m2.mtmt.hu/api/publication/34493342}, author = {Tiwary, Aditya Kumar and Singh, Harpreet and Eldin, Sayed M. and Ilyas, R. A.}, doi = {10.1515/ntrev-2023-0162}, journal-iso = {NANOTECHNOL REV}, journal = {NANOTECHNOLOGY REVIEWS}, volume = {12}, unique-id = {34493342}, issn = {2191-9089}, abstract = {The construction industry commonly employs concrete as a construction material, which sometimes may be subjected to fire exposure. It is important to adopt fire safety measures while planning and constructing such structures to ensure the safety of the occupants and the structural integrity of the concrete. So, determining its performance at elevated temperatures is of utmost importance. The main objective of this study was to investigate the impact of mineral incorporations, namely, nano bentonite clay (NBC) and nano fly ash (NFA), on the retained properties of concrete at normal (27°C) and at elevated temperatures. The feasibility of partly substituting ordinary Portland cement utilizing a mixture of NBC (0–5%) and NFA (0–50%) in concrete was assessed under the exposure to an elevated temperature ranging from 200 to 600°C. Several parameters were examined, including compressive strength, flexural strength, split tensile capacity, water penetration, loss of mass, ultrasound pulse velocity, and microstructure properties. After the experimental analysis, it was observed that the fire endurance was shown to be improved with the inclusion of nanoparticles (BC and FA). A reduction in the loss of mass by samples subjected to elevated heat was observed with the addition of nano bentonite and NFA. The mechanical strength results were obtained as maximum for the concrete specimens with 2% NBC and 20% NFA and further, the specimens performed better when exposed to elevated temperature as compared with normal concrete specimens. The microstructure of the concrete also upgraded with better impermeability owing to the use of NBC and NFA.}, year = {2023}, eissn = {2191-9097}, pages = {1} } @article{MTMT:33716215, title = {Prediction of residual bond strengths between corroded steel bars and concrete after exposure to high temperatures}, url = {https://m2.mtmt.hu/api/publication/33716215}, author = {Wang, Tian-Ci and Gao, Wan-Yang and Liu, Wang-Wei and Liang, Jian and Yang, Jian}, doi = {10.1016/j.engfracmech.2023.109213}, journal-iso = {ENG FRACT MECH}, journal = {ENGINEERING FRACTURE MECHANICS}, volume = {283}, unique-id = {33716215}, issn = {0013-7944}, abstract = {Reinforced concrete structures used in aggressive environments (e.g., coastal and ocean regions) may suffer from steel corrosion. On the other hand, structures with corroded steel bars are likely to experience fire hazards during their service life. Therefore, the combined effect of high -temperature exposure and steel corrosion may lead to a significant reduction in the post-fire bond strength between the corroded steel bars and surrounding concrete, which will further affect the residual load-capacity assessment of fire-damaged RC members. This paper presents an analytical model for predicting the residual bond strengths between the corroded steel bars and surrounding concrete after exposure to high temperatures. In the analytical model, the concrete cover around the steel bar is considered as a thick-walled cylinder whose inner surface is sub-jected to uniform pressure due to the combined action of the pull-out load and the volume expansion of the corrosion products. Three stages of the concrete cover (i.e., uncracked, partially cracked and fully cracked stages) are considered one by one in the analytical model to determine the internal pressure. During the analysis, the tensile softening behavior of the cracked concrete and the material property degradations of concrete after high-temperature exposure are properly considered. The accuracy and reliability of the proposed analytical model are verified by comparing the analytical predictions with the corresponding pull-out test results collected from the literature. A detailed parametric analysis is then performed to gain insight into the effects of various factors on the post-fire residual bond strengths of corroded steel bars.}, keywords = {Analytical model; High temperatures; Steel corrosion; Residual bond strengths; Steel bar-to-concrete interface}, year = {2023}, eissn = {1873-7315} } @article{MTMT:33569073, title = {A numerical study of blast resistance of fire damaged ultra-high performance concrete columns}, url = {https://m2.mtmt.hu/api/publication/33569073}, author = {Xu, Zhenhuan and Li, Jun and Wu, Chengqing}, doi = {10.1016/j.engstruct.2023.115613}, journal-iso = {ENG STRUCT}, journal = {ENGINEERING STRUCTURES}, volume = {279}, unique-id = {33569073}, issn = {0141-0296}, year = {2023}, eissn = {1873-7323} } @article{MTMT:34449743, title = {Finite element investigation on the post-fire behavior of reinforced composite NSC-HPC slabs}, url = {https://m2.mtmt.hu/api/publication/34449743}, author = {Zalhaf, Nagat and Ghazy, Mariam and Abdelatty, Metwali and Zakaria, Mohamed Hamed}, doi = {10.1108/WJE-08-2023-0320}, journal-iso = {WORLD J ENGINEERING}, journal = {WORLD JOURNAL OF ENGINEERING}, volume = {12}, unique-id = {34449743}, issn = {1708-5284}, year = {2023}, pages = {1} } @article{MTMT:32195350, title = {Flexural strength of silica fume, fly ash, and metakaolin of hardened cement paste after exposure to elevated temperatures}, url = {https://m2.mtmt.hu/api/publication/32195350}, author = {Abdelmelek, Nabil and Lublóy, Éva Eszter}, doi = {10.1007/s10973-021-11035-3}, journal-iso = {J THERM ANAL CALORIM}, journal = {JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY}, volume = {147}, unique-id = {32195350}, issn = {1388-6150}, abstract = {The mechanical properties of concrete based mainly on flexural and compressive bearing capacity. Generally, researchers have an interest in the evaluation of compression property through the importance of the flexural performance of the material in the constructions, namely the significance of each mechanical property based upon the position of the structural element. The present experimentally work is directed toward improving the flexural strengths performance of ordinary hardened cement paste (HCP) at ambient and after elevated temperatures exposure. The used parameters were different pozzolanic materials with different replacements ratios to cement mass and different levels of temperature. Results proved the significant contribution of pozzolanic material to enhance the flexural properties of HCP after being exposed to elevated temperatures. The low content of CaO, the high grinding fineness, and the physical morphology of the used pozzolanic materials, made their adoption effective to HCP after exposure to elevated temperatures. Using 3%, 12%, and 15% of silica fume (SF), metakaolin (MK), and fly ash (FA), respectively, showed the highest heat endurance among the other replacements. However, the optimum replacement of MK has shown a better heat endurance than the optimum replacements of SF and FA. On the other hand, the spalling has occurred at high replacements of SF. Finally, the results are supported by means of thermo-gravimetric, SEM, and computed tomography investigations.}, year = {2022}, eissn = {1572-8943}, pages = {7159-7169}, orcid-numbers = {Lublóy, Éva Eszter/0000-0001-9628-1318} } @article{MTMT:33487129, title = {Residual bond‐slip behavior in reinforced concrete members exposed to elevated temperatures}, url = {https://m2.mtmt.hu/api/publication/33487129}, author = {Asghari Ghajari, Farjam and Yousefpour, Hossein}, doi = {10.1002/suco.202200927}, journal-iso = {STRUCT CONCRETE}, journal = {STRUCTURAL CONCRETE}, volume = {5}, unique-id = {33487129}, issn = {1464-4177}, year = {2022}, eissn = {1751-7648}, pages = {1} } @CONFERENCE{MTMT:33038575, title = {High-temperature residual bond behavior of strainhardening cementitious composites}, url = {https://m2.mtmt.hu/api/publication/33038575}, author = {Dhanendra, Kumar and Alok, A. Deshpande and Amr, A. Soliman and Ravi, Ranade}, booktitle = {Bond in Concrete 2022}, unique-id = {33038575}, year = {2022}, pages = {452-463} } @article{MTMT:32783227, title = {Modelling of bond behavior of deformed bar embedded in concrete after heating to high temperatures: A mesoscale study}, url = {https://m2.mtmt.hu/api/publication/32783227}, author = {Jin, Liu and Li, Xiaoya and Zhang, Renbo and Du, Xiuli}, doi = {10.1016/j.conbuildmat.2022.127456}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {334}, unique-id = {32783227}, issn = {0950-0618}, year = {2022}, eissn = {1879-0526} } @article{MTMT:32809401, title = {Investigation on Improving the Residual Mechanical Properties of Reinforcement steel and Bond Strength of Concrete Exposed to Elevated Temperature}, url = {https://m2.mtmt.hu/api/publication/32809401}, author = {Kiran, Tattukolla and Anand, N. and Mathews, Mervin Ealiyas and Kanagaraj, Balamurali and Andrushia, A. Diana and Lublóy, Éva Eszter and Jayakumar, G}, doi = {10.1016/j.cscm.2022.e01128}, journal-iso = {CASE STUD CONSTR MAT}, journal = {Case Studies in Construction Materials}, volume = {16}, unique-id = {32809401}, issn = {2214-5095}, abstract = {Concrete and reinforcement steel are essential building materials widely used in composite construction due to their advantages, such as strength, durability and ease of availability. Fire is one of the critical hazards that causes severe damage to the structure and leads to progressive collapse. Due to the intensity of fire exposure, the concrete and reinforcing steel significantly losses their inherent mechanical properties and service life. Minimizing the fire-induced damage and failure are the primary objectives in the design of concrete structures. Therefore, an extensive experimental attempt was undertaken to evaluate the pull out behaviour and also to improve the bond performance of concrete and reinforcement steel when exposed to elevated temperature. A cement based perlite coating was developed as a protective material to safeguard the concrete in the study. All the pull out bond test specimens were heated following the ISO 834 standard fire curve, and subsequently cooled either by air or water. Residual mechanical properties of steel rebar such as yield strength, ultimate strength, elastic modulus, shear and bending capacity were evaluated after the exposure to elevated temperature. Investigations were conducted on pull out specimens to evaluate the bond stress slip behaviour and bond strength of concrete. A detailed physical observation was made on the failed concrete specimens to examine the damage. A drastic reduction in bond strength of concrete and tensile strength of the rebar were observed while increasing the duration of heating. Also, it was observed that the coated specimens exhibited better performance by retaining the bond strength and yield strength of the rebar.}, year = {2022}, eissn = {2214-5095}, orcid-numbers = {Lublóy, Éva Eszter/0000-0001-9628-1318} } @article{MTMT:32925627, title = {Performance evaluation of lightweight insulating plaster for enhancing the fire endurance of high strength structural concrete}, url = {https://m2.mtmt.hu/api/publication/32925627}, author = {Kiran, Tattukolla and Yadav, Siva Kumar and N, Anand and Mathews, Mervin Ealiyas and Andrushia, Diana and Lublóy, Éva Eszter and Kodur, Venkatesh}, doi = {10.1016/j.jobe.2022.104902}, journal-iso = {J BUILDING ENG}, journal = {JOURNAL OF BUILDING ENGINEERING}, volume = {57}, unique-id = {32925627}, abstract = {Structural concrete is a widely used building material due to its versatile characteristics including higher compressive strength and longevity. However, when exposed to fire, concrete experiences faster degradation in its mechanical properties and is also susceptible to spalling. To overcome this problem, the possibility of lightweight plaster application on High Strength Concrete (HSC) is explored in the presented investigation. Insulation plasters, namely Sand Plaster (SP), Gypsum Perlite Plaster (GPP), and Gypsum Mineral Wool Plaster (GMP) were developed. This investigation evaluates the compressive strength, bond strength, and shear strength of concrete which is exposed to the standard fire temperature. Varying cooling conditions which involved air and water were adopted to cool the concrete specimens after the elevated temperature test. Further, the damaged concrete and the plaster were examined to analyse the physical changes. Analysis of the study reveals that more number of denser surface cracks and higher mass loss was observed for reference and SP specimens. Temperature penetration at the core of cube, bond, and shear specimens is less for the GPP and GMP specimens when compared with the SP specimens. At higher temperatures (986 °C), the reference and SP specimens show a lower bond and shear strength with higher slip values. Specimens insulated with GPP and GMP exhibited a low-temperature penetration at the core portion. Also, the results of the study reported the higher residual compressive, bond, and shear strength compared to other specimens.}, year = {2022}, eissn = {2352-7102}, orcid-numbers = {Kiran, Tattukolla/0000-0001-7445-5989; N, Anand/0000-0001-7643-9747; Mathews, Mervin Ealiyas/0000-0003-0170-2138; Lublóy, Éva Eszter/0000-0001-9628-1318; Kodur, Venkatesh/0000-0003-2058-2725} } @{MTMT:33734300, title = {Effect of high temperature on bond behavior between reinforcement and concrete}, url = {https://m2.mtmt.hu/api/publication/33734300}, author = {Lakhani, Hitesh and Hofmann, Jan}, booktitle = {fib Bulletin 106. Advances on bond in concrete}, doi = {10.35789/fib.BULL.0106.Ch11}, unique-id = {33734300}, year = {2022}, pages = {173-187} } @article{MTMT:33025346, title = {Post-fire dynamic bond behavior of concrete and deformed bar: Mesoscale simulation and constitutive modeling}, url = {https://m2.mtmt.hu/api/publication/33025346}, author = {Li, Xiaoya and Zhang, Renbo and Jin, Liu and Du, Xiuli}, doi = {10.1016/j.engstruct.2022.114681}, journal-iso = {ENG STRUCT}, journal = {ENGINEERING STRUCTURES}, volume = {267}, unique-id = {33025346}, issn = {0141-0296}, year = {2022}, eissn = {1873-7323} } @article{MTMT:33096998, title = {Probabilistic prediction model of steel to concrete bond failure under high temperature by machine learning}, url = {https://m2.mtmt.hu/api/publication/33096998}, author = {Mei, Yong and Sun, Yunhou and Li, Feng and Xu, Xiangyun and Zhang, Ao and Shen, Jun}, doi = {10.1016/j.engfailanal.2022.106786}, journal-iso = {ENG FAIL ANAL}, journal = {ENGINEERING FAILURE ANALYSIS}, volume = {142}, unique-id = {33096998}, issn = {1350-6307}, abstract = {The interface bond performance between concrete and steel bars under high temperature has a crucial influence on the fire resistance design of the reinforced concrete (RC) structure, but there is no unified model for the prediction of the bond strength yet. Previous experimental studies have conducted plenty of RC member pull-out tests under high temperature, which could be collected as a comprehensive database. As a data-driven method, machine learning (ML) can efficiently establish the regression relationship between input features and output directly through the data. However, current studies usually use classic ML algorithms for establishing a deterministic prediction model, where only one scalar prediction would be provided and its confidence level is uncertain, which is not instructive for the users. Thus, based on previous experimental data, this paper uses the Natural Gradient Boosting (NGBoost) algorithm to estab-lish a unified probabilistic prediction model for the bond strength between steel bars and concrete under high temperature, considering several key factors, such as fiber fraction, concrete compressive strength, bond strength under room temperature et al. By training on the collected 267 experimental data, the prediction results of the ML based model show that these models attain higher accuracy than those of empirical formulas, and the NGBoost based probabilistic prediction model has better prediction performance than the general deterministic ML models. Finally, the Shapley value method is used to explain the calculation results of the model, and compared with the statistical results such as variance and mean of the calculation results of the five empirical formulas, ML has obvious advantages.}, keywords = {VALIDATION; DEGRADATION; strength; high temperature; Civil engineering; Engineering, Mechanical; Reinforced-concrete; Reinforced concrete component; Steel rebar and concrete; Cast in-situ; Mathematical modelling with experimental}, year = {2022}, eissn = {1873-1961} } @article{MTMT:33030575, title = {On post-fire bond strength of steel rebar embedded in thermally-damaged concrete–a review}, url = {https://m2.mtmt.hu/api/publication/33030575}, author = {Mousavi, S.S. and Dehestani, M. and Mousavi, Ajarostaghi S.S. and Bhojaraju, C. and Nguyen-Tri, P.}, doi = {10.1080/01694243.2021.2025308}, journal-iso = {J ADHES SCI TECHNOL}, journal = {JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY}, unique-id = {33030575}, issn = {0169-4243}, abstract = {This study summarizes the state-of-the-art research progress concerning the influence of high-temperature exposure on the residual bond strength of steel rebar. Also, an experimental database from the literature was collected and analyzed for use in fire safety management in concrete design codes and specifications for high important reinforced concrete (RC) structures, such as public health-care buildings, to reduce and mitigate the risk of thermal damages, especially in steel-congested areas. Different vital variables are debated in the present review, including concrete cover-to-rebar diameter ratio, rebar deformation, fiber addition, transverse confinement, aggregate type, concrete water-to-binder ratio, concrete type, cooling regime, thermal loading regime, and heating exposure time. The review shows that high-temperature exposure significantly reduces the residual bond strength. It is concluded that increasing concrete cover, the addition of fibers, considering transverse confinement, using deformed rebar instead of a plain one, using a concrete mixture with a lower value of (Formula presented.) ratio, and air-cooling regime alleviate the detrimental influence of high-temperature exposure on the residual bond strength. Standing time can significantly recover the bond reduction as a healing period. Additionally, research gaps and the current conflicting results regarding some variables are drawn to be considered for future works. © 2022 Informa UK Limited, trading as Taylor & Francis Group.}, keywords = {Health risks; State of the art; Bond strength (materials); Reinforced concrete; steel fibers; Steel rebars; Concrete mixtures; Concrete cover; steel rebar; High-temperature exposure; High-temperature exposure; post-fire; post-fire; Transverse confinement; residual bond strength; residual bond strength; Cooling regimes; Damaged concretes; thermally-damaged concrete; thermally-damaged concrete}, year = {2022}, eissn = {1568-5616} } @{MTMT:33734306, title = {Recent developments in design of pre-cast and p ost-installed rebar connections under temperature}, url = {https://m2.mtmt.hu/api/publication/33734306}, author = {Muciaccia, Giovanni}, booktitle = {fib Bulletin 106. Advances on bond in concrete}, doi = {10.35789/fib.BULL.0106.Ch12}, unique-id = {33734306}, year = {2022}, pages = {188-199} } @CONFERENCE{MTMT:33038590, title = {Bond in RC structures at high temperature and in fire: lessons from the past and hot issues still open to investigation}, url = {https://m2.mtmt.hu/api/publication/33038590}, author = {Pietro, G. Gambarova and Giovanni, Muciaccia}, booktitle = {Bond in Concrete 2022}, unique-id = {33038590}, year = {2022}, pages = {790-802} } @article{MTMT:32796922, title = {Bond slip behaviour of deformed bar embedded in sustainable concrete at elevated temperature}, url = {https://m2.mtmt.hu/api/publication/32796922}, author = {Sahani, Ashok Kumar and Samanta, Amiya Kumar}, doi = {10.1007/s12046-022-01856-9}, journal-iso = {SADHANA-ACAD P ENG S}, journal = {SADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES}, volume = {47}, unique-id = {32796922}, issn = {0256-2499}, year = {2022}, eissn = {0973-7677}, orcid-numbers = {Sahani, Ashok Kumar/0000-0001-9586-8993} } @article{MTMT:33665526, title = {Investigation of Ultrasonic Pulse Velocity Reduction in Reinforced Concrete Members Exposed to High Temperature}, url = {https://m2.mtmt.hu/api/publication/33665526}, author = {Vinh, An Le and Thi-Thanh, Thao Nguyen and Ngoc, Tan Nguyen}, journal-iso = {J MATER ENG STRUCT}, journal = {JOURNAL OF MATERIALS AND ENGINEERING STRUCTURES}, volume = {9}, unique-id = {33665526}, issn = {2170-127X}, year = {2022}, pages = {531-537} } @article{MTMT:32893200, title = {Analytical model for predicting the post-fire bond behavior between steel bars and concrete}, url = {https://m2.mtmt.hu/api/publication/32893200}, author = {Wang, Tian-Ci and Gao, Wan-Yang and Hu, Li-Li and Hamed, Ehab and Bai, Yu-Lei and Zeng, Jun-Jie and Yang, Jian}, doi = {10.1016/j.conbuildmat.2022.128129}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {343}, unique-id = {32893200}, issn = {0950-0618}, year = {2022}, eissn = {1879-0526} } @inbook{MTMT:33031279, title = {Fire resistance of self-compacting high-performance concrete produced with cellular concrete powder}, url = {https://m2.mtmt.hu/api/publication/33031279}, author = {Abed, Mohammed and Nemes, Rita}, booktitle = {Infrastructure Management, Assessment and Rehabilitation}, unique-id = {33031279}, year = {2021}, pages = {2-14}, orcid-numbers = {Nemes, Rita/0000-0001-5587-3835} } @article{MTMT:31657550, title = {Bond strength of corroded reinforcements in concrete after high-temperature exposure}, url = {https://m2.mtmt.hu/api/publication/31657550}, author = {Ba, Guangzhong and Weng, Xiangyu and Liu, Caiwei and Miao, Jijun}, doi = {10.1016/j.conbuildmat.2020.121400}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {270}, unique-id = {31657550}, issn = {0950-0618}, year = {2021}, eissn = {1879-0526}, orcid-numbers = {Weng, Xiangyu/0000-0001-5932-5254} } @mastersthesis{MTMT:32777833, title = {Strain hardening cementitious composites for fire resilient infrastructure}, url = {https://m2.mtmt.hu/api/publication/32777833}, author = {Dhanendra, Kumar}, unique-id = {32777833}, year = {2021} } @article{MTMT:32390844, title = {Evaluation of post-fire pull-out behavior of steel rebars in high-strength concrete containing waste PET and steel fibers: Experimental and theoretical study}, url = {https://m2.mtmt.hu/api/publication/32390844}, author = {Fakoor, Maziar and Nematzadeh, Mahdi}, doi = {10.1016/j.conbuildmat.2021.123917}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {299}, unique-id = {32390844}, issn = {0950-0618}, abstract = {The present research addressed the post-fire bond performance between high-strength concrete incorporating waste polyethylene terephthalate (WPET) and steel reinforcement; a subject that had not been previously addressed. Further, the impact of incorporating steel fiber, as a commonly used material, into the mixture on the bond improvement was assessed. To this end, the content of WPET substituting for the fine aggregate by volume (0, 5, and 10%), volume fraction of steel fibers (0, 0.5, and 1%), applied temperature (25, 200, 400, and 600 degrees C) were considered as variables in a total of 108 samples that were produced. Afterward, the samples were subjected to the pullout test to examine different parameters. These parameters included the bond behavior, failure mode, bond stress-slip response, and bond strength-compressive strength behavior. Based on the results, with the incorporation of 5 and 10% volume content of WPET replacing fine particles, the bond strength declined by 4 and 26%, respectively, and as the temperature was raised, this reducing effect increased. Furthermore, the presence of steel fiber had a positive impact in the samples with the splitting failure mode, while it had a negligible or sometimes even negative impact in the samples with the pull-out failing mode. Lastly, multivariate prediction models were proposed for the bond behavior and bond-slip response as a function of the concrete compressive strength, WPET content, content of steel fiber, and the target temperature. Afterward, a comparison was made between the empirical results and the predictions of models developed by other researchers and the fib Model Code 2010 and ACI 408-12 codes. (c) 2021 Elsevier Ltd. All rights reserved.}, keywords = {PREDICTION; high temperature; WASTE; Bond behavior; Failure mode; high-strength concrete; Bond stress-slip response; WPET; Steel fiber-reinforced concrete (SFRC)}, year = {2021}, eissn = {1879-0526} } @article{MTMT:32399916, title = {Bond behaviors between copper slag concrete and corroded steel bar after exposure to high temperature}, url = {https://m2.mtmt.hu/api/publication/32399916}, author = {Gong, Wei and Chen, Qi and Miao, Jijun}, doi = {10.1016/j.jobe.2021.103312}, journal-iso = {J BUILDING ENG}, journal = {JOURNAL OF BUILDING ENGINEERING}, volume = {44}, unique-id = {32399916}, abstract = {In this paper, the experimental investigation on degradation law of bond behaviors between copper slag concrete and corroded steel bar after exposure to high temperature was conducted. The bond behaviors such as bond strength, bond stiffness, peak slip displacement and average bond stress-slip curve between copper slag concrete and corroded steel bar after heating were analyzed with the change in heating temperature and corrosion rate of steel bar. Moreover, the distribution of free chloride ion in concrete was measured and the chloride ion diffusion coefficient was also calculated. At last, the bond-slip constitutive model suitable for high temperature damaged concrete and corroded steel bar was proposed. The test results showed that the chloride ion diffusion coefficient of high temperature damaged copper slag concrete increased with the increasing of copper slag replacing ratio and heating temperature. The bond strength between copper slag concrete and corroded steel bar decreased with the increasing of heating temperature and corrosion rate of the steel bar and decreased at an accelerated rate with the increasing of the copper slag replacing ratio, and the peak slip displacement gradually increased as the heating temperature increased. However, the bond stiffness increased first and then decreased with the increasing of heating temperature, and the bond stiffness also increased with the increasing of copper slag replacing ratio. At last, the accuracy of the bond-slip constitutive model established based on the test results was verified.}, keywords = {diffusion coefficient; high temperature; chloride attack; Copper slag concrete; Steel bar corrosion; Bond behaviors}, year = {2021}, eissn = {2352-7102} } @article{MTMT:32708954, title = {Effect of elevated temperature on interfacial shear transfer capacity of self-compacting concrete}, url = {https://m2.mtmt.hu/api/publication/32708954}, author = {Mathews, Mervin Ealiyas and Anand, N. and Lublóy, Éva Eszter and Kiran, Tattukolla}, doi = {10.1016/j.cscm.2021.e00753}, journal-iso = {CASE STUD CONSTR MAT}, journal = {Case Studies in Construction Materials}, volume = {15}, unique-id = {32708954}, issn = {2214-5095}, abstract = {Interfacial shear stress transfer may occur in structural elements across concrete or between concrete and steel. The fundamental contributing parameters which improve the shear capacities are aggregate grading, compressive strength of concrete, type and area of the interfacial zone, and interfacial reinforcement pattern. During the event of a fire, these parameters are severely affected and mainly depend on the exposure level of the temperature and its duration. In the present investigation, the effect of elevated temperature on the interfacial Shear Transfer Capacity (STC) of Self-Compacting Concrete (SCC) was evaluated using shear (push-off) specimens. SCC was developed using Fly Ash (FA) and Ground Granulated Blast Furnace Slag (GGBFS) as Supplementary Cementitious Material (SCM). The study emphasises the proper understanding of degradation in shear strength of SCC exposed to elevated temperatures. Expanded Perlite Aggregate (EPA) is utilised as a partial replacement for fine aggregate. Also, a thermal protective coating is developed with Cement Perlite Plaster (CPP) for improving the performance of SCC. The European Federation of National Associations Representing for Concrete (EFNARC) guidelines were followed to ensure the workability of the developed SCC mix. Specimens were exposed to 30, 60, 90, and 120 min of heating durations following the International Organization for Standardization 834 (ISO 834) fire rating curve and tested to examine residual compressive strength, mass loss, STC after the natural air cooling process. The SCC specimens with EPA content have exhibited higher residual compressive strength and STC. All the protected SCC specimens coated with the CPP mixture contributed to retaining the original shear capacity by resisting the temperature. An empirical relationship was proposed to predict the residual STC of SCC after exposure to elevated temperature.}, keywords = {Shear stress; shear strength; Elevated temperature; SELF-COMPACTING CONCRETE; Engineering, Civil; Construction & Building Technology}, year = {2021}, eissn = {2214-5095}, orcid-numbers = {Lublóy, Éva Eszter/0000-0001-9628-1318} } @article{MTMT:31790313, title = {Local bond properties of reinforcement in concrete subjected to elevated temperatures: Effects of clear cover, bonded length and heating and loading procedures}, url = {https://m2.mtmt.hu/api/publication/31790313}, author = {Muciaccia, Giovanni and Consiglio, Andrea Nino}, doi = {10.1016/j.engstruct.2020.111594}, journal-iso = {ENG STRUCT}, journal = {ENGINEERING STRUCTURES}, volume = {230}, unique-id = {31790313}, issn = {0141-0296}, year = {2021}, eissn = {1873-7323} } @article{MTMT:31915084, title = {Innovative models for predicting post-fire bond behavior of steel rebar embedded in steel fiber reinforced rubberized concrete using soft computing methods}, url = {https://m2.mtmt.hu/api/publication/31915084}, author = {Nematzadeh, Mahdi and Shahmansouri, Amir Ali and Zabihi, Reza}, doi = {10.1016/j.istruc.2021.02.015}, journal-iso = {STRUCTURES}, journal = {STRUCTURES}, volume = {31}, unique-id = {31915084}, issn = {2352-0124}, year = {2021}, eissn = {2352-0124}, pages = {1141-1162} } @mastersthesis{MTMT:31850572, title = {Bond behaviour of FRP bars to concrete, influence of bar surface, entrained air and high temperatures}, url = {https://m2.mtmt.hu/api/publication/31850572}, author = {Sólyom, Sándor}, publisher = {Budapest University of Technology and Economics}, unique-id = {31850572}, year = {2021}, orcid-numbers = {Sólyom, Sándor/0000-0002-3517-7960} } @article{MTMT:32111016, title = {Bond of FRP bars in air-entrained concrete: Experimental and statistical study}, url = {https://m2.mtmt.hu/api/publication/32111016}, author = {Sólyom, Sándor and Di Benedetti, Matteo and Balázs, György László}, doi = {10.1016/j.conbuildmat.2021.124193}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {300}, unique-id = {32111016}, issn = {0950-0618}, year = {2021}, eissn = {1879-0526}, orcid-numbers = {Sólyom, Sándor/0000-0002-3517-7960; Balázs, György László/0000-0002-7711-137X} } @article{MTMT:32399922, title = {Early age bond stress-slip behaviour of macro-synthetic fibre reinforced concrete}, url = {https://m2.mtmt.hu/api/publication/32399922}, author = {Watts, Murray J. and Amin, Ali and Bernard, E. Stefan and Gilbert, R. Ian and Facconi, Luca}, doi = {10.1016/j.conbuildmat.2021.124097}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {301}, unique-id = {32399922}, issn = {0950-0618}, abstract = {The magnitude of bond stress that exists between concrete and steel reinforcement heavily influences the width and spacing of cracks. An understanding of the bond stress available is important when estimating deformations and crack widths in structural concrete. Experimental studies and modelling have shown that the inclusion of fibres improves bond characteristics in structural concrete. These studies have focused on the strength criterion in mature aged concretes containing steel fibres. No early age bond test results currently exist for macro-synthetic fibre reinforced concrete (FRC). In this paper, the results of an experimental campaign are presented on the bondslip behaviour of macro-synthetic fibre reinforced concrete (containing either 0, 4 or 8 kg/m(3) of fibres) tested at 1, 3, 7, 14, 28 and 90 days using standard pull-out tests. The tests are complimented with a suite of material characterisation tests. Furthermore, a simple model founded on previous approaches is presented to describe the ascending portion of the bond stress - slip relationship for FRC. It is concluded that the early age bond strength is slightly improved through the addition of macro-synthetic fibre reinforcement. On the other hand, the early age bond stiffness of reinforced concrete is substantially improved through the addition of macro-synthetic fibre reinforcement.}, keywords = {BOND; Reinforced concrete; fibre; Bond stress-slip; Early ages}, year = {2021}, eissn = {1879-0526} } @article{MTMT:30871672, title = {Performance of Self-Compacting High-Performance Concrete Produced with Waste Materials after Exposure to Elevated Temperature}, url = {https://m2.mtmt.hu/api/publication/30871672}, author = {Abed, Mohammed and Nemes, Rita and Lublóy, Éva Eszter}, doi = {10.1061/(ASCE)MT.1943-5533.0002989}, journal-iso = {J MATER CIVIL ENG}, journal = {JOURNAL OF MATERIALS IN CIVIL ENGINEERING}, volume = {32}, unique-id = {30871672}, issn = {0899-1561}, year = {2020}, eissn = {1943-5533}, orcid-numbers = {Nemes, Rita/0000-0001-5587-3835; Lublóy, Éva Eszter/0000-0001-9628-1318} } @inbook{MTMT:33031107, title = {Effect of Heating Rate on Bond Behavior Between Steel and Concrete at Elevated Temperatures}, url = {https://m2.mtmt.hu/api/publication/33031107}, author = {Banoth, I. and Agarwal, A.}, booktitle = {Advances in Structural Engineering: Select Proceedings of FACE 2019}, doi = {10.1007/978-981-15-4079-0_8}, volume = {74}, unique-id = {33031107}, abstract = {The bond behavior between steel and concrete was evaluated under elevated temperatures of 23, 100, 200, 300, 400, 500, and 600 °C with different heating rates. The specimen for testing is the cubical size of 200 × 200 × 200 mm with a rebar placed at the center. The strength of concrete was 25 N/mm2, and different diameters 12 and 20 mm rebars were used. The specimens were heated up to the desired temperature at the interface by following heating rate of 2 °C/min and ISO 834 standard fire curve. Pullout tests were conducted for determining the bond strength and slip between steel and concrete. The bond strength was decreased with increasing temperature and heating rate. The bond strength was decreased very randomly by following heating rate according to ISO 834. © 2020, Springer Nature Singapore Pte Ltd.}, keywords = {heating; concrete; Elevated temperature; Elevated temperature; Heating rate; Heating rate; Bond strength (materials); Concretes; Increasing temperatures; Bond behavior; Pull-out test; pullout; Standard fire; Rebar; Rebar; Bond strength and slip; Strength of concrete}, year = {2020}, pages = {89-98} } @techreport{MTMT:31372888, title = {Multiscale Study of Reinforced Concrete Shear Walls Subjected to Elevated Temperatures}, url = {https://m2.mtmt.hu/api/publication/31372888}, author = {Deshpande, AA and Whittaker, AS}, unique-id = {31372888}, year = {2020} } @article{MTMT:31124939, title = {Temperature effects on the bond behavior between deformed steel reinforcing bars and hybrid fiber-reinforced strain-hardening cementitious composite}, url = {https://m2.mtmt.hu/api/publication/31124939}, author = {Deshpande, Alok A. and Kumar, Dhanendra and Ranade, Ravi}, doi = {10.1016/j.conbuildmat.2019.117337}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {233}, unique-id = {31124939}, issn = {0950-0618}, year = {2020}, eissn = {1879-0526}, orcid-numbers = {Deshpande, Alok A./0000-0002-3421-5347; Ranade, Ravi/0000-0001-6030-8371} } @article{MTMT:31035380, title = {Effect of temperature on the bond behaviour of GFRP bars in concrete}, url = {https://m2.mtmt.hu/api/publication/31035380}, author = {Sólyom, Sándor and Di Benedetti, Matteo and Guadagnini, Maurizio and Balázs, György László}, doi = {10.1016/j.compositesb.2019.107602}, journal-iso = {COMPOS PART B-ENG}, journal = {COMPOSITES PART B-ENGINEERING}, volume = {183}, unique-id = {31035380}, issn = {1359-8368}, keywords = {BOND; High-temperature properties; A. Glass fibres; C. Analytical modelling; C. Mechanical testing}, year = {2020}, eissn = {1879-1069}, orcid-numbers = {Sólyom, Sándor/0000-0002-3517-7960; Balázs, György László/0000-0002-7711-137X} } @article{MTMT:31265048, title = {Non-linear multivariable model for predicting the steel to concrete bond after high temperature exposure}, url = {https://m2.mtmt.hu/api/publication/31265048}, author = {Varona, F.B. and Baeza, F.J. and Bru, D. and Ivorra, S.}, doi = {10.1016/j.conbuildmat.2020.118713}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {249}, unique-id = {31265048}, issn = {0950-0618}, year = {2020}, eissn = {1879-0526}, orcid-numbers = {Varona, F.B./0000-0001-7273-2823; Baeza, F.J./0000-0002-6837-3423; Ivorra, S./0000-0002-8647-8173} } @article{MTMT:33031106, title = {Analysis of bond behavior of steel bar-to-concrete interface after exposure to elevated temperatures}, url = {https://m2.mtmt.hu/api/publication/33031106}, author = {Zhou, M.-W. and Gao, W.-Y. and Hu, K.-X.}, doi = {10.19815/j.jace.2019.12094}, journal = {Journal of Architecture and Civil Engineering}, volume = {37}, unique-id = {33031106}, issn = {1673-2049}, abstract = {Based on the thick-walled cylinder model with uniform pressure at inner surface, the damaged concrete cover around the deformed bar was divided into two parts according to the stress state, including a partially cracked inner part and an uncracked outer one. For the inner cylinder, the smeared cracking assumption and tension softening behavior of the cracked concrete was taken into account with the stiffness reduction along the radial direction. Also, the reductions in the elastic modulus, tensile strength and fracture energy of concrete after exposure to elevated temperatures were properly considered. Based on the theoretical analysis of the ultimate splitting failure between steel bar and concrete damaged by high temperatures, the calculation method and analytical model of the interfacial bond strength between steel bar and concrete after exposure to high temperatures was deduced, which was related to the size and material properties of steel bar and concrete. Moreover, a linear relationship between the radius of the inner cracked cylinder and the end slip of the reinforcing steel bar was proposed, and thus the interfacial bond stress-slip relationship was obtained. The accuracy of the analytical model was validated by comprising the predicted results with available pull out test data on the steel bar-to-concrete interface(including 118 bond strength data and 15 bond stress-end slip curves). The results show that the analytical model has good accuracy, and can be widely used for the analysis and prediction of interfacial bond strength after high temperature in drawing test with different parameters. © 2020, Editorial Department of Journal of Architecture and Civil Engineering. All rights reserved.}, keywords = {INTERFACE; Analytical model; Bond behavior; RC structure; After exposure to elevated temperatures}, year = {2020}, eissn = {1673-2049}, pages = {91-99} } @mastersthesis{MTMT:31348620, title = {Green self-compacting high-performance concrete}, url = {https://m2.mtmt.hu/api/publication/31348620}, author = {Abed, Mohammed}, publisher = {Budapest University of Technology and Economics}, unique-id = {31348620}, year = {2019} } @article{MTMT:30646788, title = {The impact of time on the heat resistance of self-compacting high-performance concrete incorporated with recycled materials}, url = {https://m2.mtmt.hu/api/publication/30646788}, author = {Abed, Mohammed and Nemes, Rita and Lublóy, Éva Eszter}, doi = {10.1007/s10973-019-08263-z}, journal-iso = {J THERM ANAL CALORIM}, journal = {JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY}, volume = {138}, unique-id = {30646788}, issn = {1388-6150}, year = {2019}, eissn = {1572-8943}, pages = {35-45}, orcid-numbers = {Nemes, Rita/0000-0001-5587-3835; Lublóy, Éva Eszter/0000-0001-9628-1318} } @inproceedings{MTMT:31121313, title = {Effects of elevated temperatures and of loading procedures on the bond performance of reinforcement in concrete}, url = {https://m2.mtmt.hu/api/publication/31121313}, author = {AGNOLETTI, A. and CONSIGLIO, A. and MUCIACCIA, G. and BOSNJAK, J. and SHARMA, A.}, booktitle = {Proceedings 9th International Conference On Concrete Under Severe Conditions - Environment and Loading}, doi = {10.31808/5ca6e03e5ca4f0d406ac88aa}, unique-id = {31121313}, year = {2019}, pages = {1-9} } @mastersthesis{MTMT:30687583, title = {A MULTISCALE STUDY OF CONCRETE SUBJECTED TO ELEVATED TEMPERATURES}, url = {https://m2.mtmt.hu/api/publication/30687583}, author = {Alok, Abhay Deshpande}, unique-id = {30687583}, year = {2019} } @article{MTMT:30750577, title = {Synergistic effects of steel fibres and expansive agent on steel bar-concrete bond}, url = {https://m2.mtmt.hu/api/publication/30750577}, author = {Li, L.G. and Chen, Z.P. and Ouyang, Y. and Zhu, J. and Chu, S.H. and Kwan, A.K.H.}, doi = {10.1016/j.cemconcomp.2019.103380}, journal-iso = {CEMENT CONCRETE COMP}, journal = {CEMENT & CONCRETE COMPOSITES}, volume = {104}, unique-id = {30750577}, issn = {0958-9465}, year = {2019}, eissn = {1873-393X}, orcid-numbers = {Chu, S.H./0000-0001-8650-8056} } @misc{MTMT:31124967, title = {Bond Behaviour of Steel Reinforcing Bars Embedded in Ultra-High-Performance Steel Fiber Reinforced Concrete}, url = {https://m2.mtmt.hu/api/publication/31124967}, author = {Saikali, Elisabeth Rita}, unique-id = {31124967}, year = {2019} } @inproceedings{MTMT:33031109, title = {Non-linear numerical models for predicting the bond strength of fibre-reinforced concrete at high temperatures}, url = {https://m2.mtmt.hu/api/publication/33031109}, author = {Varona, F.B. and Villacampa, Y. and Navarro-González, F.J. and Bru, D. and Baeza, F.J.}, booktitle = {Computational methods and experimental measurements XIX & Earthquake Resistant engineering structures XII}, doi = {10.2495/CMEM190191}, volume = {125}, unique-id = {33031109}, abstract = {The steel to concrete bond mechanism is critical to address the behaviour of reinforced concrete structural members. Although this mechanism can be compromised during a fire, it may be one of the least researched phenomena in concrete technology and is not addressed in the design codes and standards. In this work, we present a thorough review of the experimental data available on this topic, focusing on fibre-reinforced concrete. The data allow us to study the evolution of the bond strength as a function of three variables: the exposure temperature, the type of fibre and the volume fraction. A linear multiple regression is initially carried out, followed by a series of non-linear numerical models. These models are built using a methodology based on the finite element method combined with the formulation of the Galerkin method. The numerical models have been developed for different degrees of complexity. The error measurements obtained with the linear regression and the numerical models are compared in order to present a prediction model. The selected model is then validated for different values of the independent variables. This process supports the discussion of the influence that the independent variables have in the evolution of the bond strength between steel reinforcement and fibre-reinforced concretes exposed to high temperatures. © 2019 WIT Press.}, keywords = {high temperature; Bond strength; Fibre-reinforced concrete; Non-linear numerical models}, year = {2019}, pages = {195-206} } @inproceedings{MTMT:33031171, title = {Numerical models to predict residual adhesion between steel and fiber-reinforced concrete at high temperature}, url = {https://m2.mtmt.hu/api/publication/33031171}, author = {Varona, Francisco de Borja and Villacampa, Yolanda and Navarro-Gonzalez, Francisco J. and Bru, David and Baeza, F. Javier}, booktitle = {5th International Conference on Mechanical Models in Structural Engineering (CMMOST 2019)}, unique-id = {33031171}, abstract = {The mechanism of adhesion between corrugated steel and concrete is fundamental in the study of the structural capacity of reinforced concrete. Although this mechanism can be compromised in fire situations, it is probably one of the least studied phenomena in the field of concrete technology and is not contemplated in the design regulations. This paper presents an exhaustive review of the available experimental data, focusing especially on fiber-reinforced concrete. The data allow characterizing the evolution of the adhesion as a function of three variables: the maximum exposure temperature, the type of fiber and its volume fraction. Initially, a linear multiple regression analysis was performed, followed by a series of non-linear numerical models. These models have been constructed using an approach based on the finite element method combined with the Galerkin method formulation. The numerical models have been developed for different degrees of mesh complexity. The error measurements resulting from the application of the above techniques are then compared in order to propose a suitable prediction model. Finally, the selected model is validated for different input values of the independent variables. This last phase serves as a basis for a discussion on how these independent variables affect the evolution of the adhesion between steel and fiber-reinforced concrete after exposure to high temperatures.}, keywords = {MODELS; MECHANICAL-PROPERTIES; BOND; strength; high temperature; fiber-reinforced concrete; steel-concrete adhesion}, year = {2019}, pages = {519-532} } @CONFERENCE{MTMT:30386965, title = {Effects of Elevated Temperatures on Residual Bond Strength of Steel Rebar with Strain Hardening Cementitious Composite}, url = {https://m2.mtmt.hu/api/publication/30386965}, author = {Kumar, Dhanendra and Deshpande, Alok and Ranade, Ravi and Elhami, Khorasani Negar}, booktitle = {Proceedings of 3rd R. N. Raikar Memorial International Conference on Science and Technology of Concrete}, unique-id = {30386965}, year = {2018} } @article{MTMT:27613386, title = {Assessment and restoration of bond strength of heat-damaged reinforced concrete elements}, url = {https://m2.mtmt.hu/api/publication/27613386}, author = {Shamseldein, Ayman and Elshafie, Hany and Rashad, Ahmed and Kohail, M}, doi = {10.1016/j.conbuildmat.2018.03.008}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {169}, unique-id = {27613386}, issn = {0950-0618}, year = {2018}, eissn = {1879-0526}, pages = {425-435} } @article{MTMT:27406735, title = {Evolution of the bond strength between reinforcing steel and fibre reinforced concrete after high temperature exposure}, url = {https://m2.mtmt.hu/api/publication/27406735}, author = {Varona, F B and Baeza, F J and Bru, D and Ivorra, S}, doi = {10.1016/j.conbuildmat.2018.05.065}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {176}, unique-id = {27406735}, issn = {0950-0618}, year = {2018}, eissn = {1879-0526}, pages = {359-370} } @article{MTMT:26649557, title = {Bond characteristics between early aged fly ash concrete and reinforcing steel bar after fire}, url = {https://m2.mtmt.hu/api/publication/26649557}, author = {Li, Qingtao and Huang, Xiaohua and Huang, Zhaohui and Yuan, Guanglin}, doi = {10.1016/j.conbuildmat.2017.04.184}, journal-iso = {CONSTR BUILD MATER}, journal = {CONSTRUCTION AND BUILDING MATERIALS}, volume = {147}, unique-id = {26649557}, issn = {0950-0618}, year = {2017}, eissn = {1879-0526}, pages = {701-712} } @article{MTMT:26662984, title = {Post-cooling properties of concrete exposed to fire}, url = {https://m2.mtmt.hu/api/publication/26662984}, author = {Wouter, Botte and Caspeele, Robby}, doi = {10.1016/j.firesaf.2017.06.010}, journal-iso = {FIRE SAFETY J}, journal = {FIRE SAFETY JOURNAL}, volume = {92}, unique-id = {26662984}, issn = {0379-7112}, year = {2017}, eissn = {1873-7226}, pages = {142-150} }