@article{MTMT:34142201,
	title = {State-of-the-Art: Integrating Fastener Technology and Design Guidelines for Enhanced Performance of Cold-Formed Steel Sections},
	url = {https://m2.mtmt.hu/api/publication/34142201},
	author = {HUSSEIN, ARDALAN and Papp, Ferenc},
	doi = {10.3390/buildings13092338},
	journal-iso = {BUILDINGS-BASEL},
	journal = {BUILDINGS},
	volume = {13},
	unique-id = {34142201},
	abstract = {Cold-formed steel (CFS) elements have gained significant attention in the field of structural engineering due to their numerous advantages, including high strength-to-weight ratio, cost-effectiveness, and ease of assembly and prefabrication. This review paper presents a comprehensive state-of-the-art analysis of the design and analysis of CFS structures, with a specific focus on columns and beams. The primary objectives and aims of this review paper are to provide a detailed assessment of the factors influencing the behavior and performance of CFS elements, including partial composite action, fastener spacing, bolt arrangement, web aperture, stiffeners, and connection spacing, to propose and present various formulas and methodologies that accurately estimate critical buckling loads, strength, and moment resistance for CFS members, and to emphasize the significance of proper screw and bolt placement in preventing premature failure and enhancing the overall load-carrying capacity of CFS structures. Additionally, the impact of temperature on the mechanical properties and performance of CFS members is discussed. The review paper proposes different formulas and methodologies to accurately estimate critical buckling loads, strength, and moment resistance for CFS members. Moreover, the paper highlights the importance of proper screw and bolt placement to prevent early failure and improve the overall load-carrying capacity of CFS structures. The discussion also emphasizes the need for revisions in existing standards and codes to provide more practical guidelines for designers and engineers. Overall, this state-of-the-art review paper provides valuable insights and recommendations for researchers and practitioners involved in the design and analysis of CFS elements.},
	year = {2023},
	eissn = {2075-5309},
	orcid-numbers = {HUSSEIN, ARDALAN/0000-0001-8623-7794}
}

@article{MTMT:34139857,
	title = {Novel formula for the elastic critical moment of beams with corrugated web},
	url = {https://m2.mtmt.hu/api/publication/34139857},
	author = {Hajdú, Gábor and Papp, Ferenc},
	doi = {10.1002/cepa.2614},
	journal-iso = {CE/PAPERS},
	journal = {CE/PAPERS},
	volume = {6},
	unique-id = {34139857},
	abstract = {This paper presents a novel analytical expression to determine the elastic lateraltorsional buckling resistance of I‐beams with corrugated web. The corrugated web beams have higher torsional stiffness than the flat web beams; therefore, the self‐weight of the beam can be reduced. The appropriate hand calculation methods to determine the elastic critical moment of corrugated web beams are based on the modification of warping constant of the cross‐section. In this paper, instead of modifying the warping constant the approximate expression is derived from the total potential strain energy of the beam using an energy method. During the solution, the beam is separated into three parts. The flanges are modelled as thin‐walled beams and the corrugated web is modelled as a thin equivalent orthotropic plate with uniform thickness. To assess the accuracy of the proposed analytical formula full shell finite element models were created in Abaqus software. The accuracy of the proposed expression is examined for sinusoidal and trapezoidal corrugation also. The results of the parametric study showed that the derived formula is accurate and applicable for elastic lateral‐torsional buckling analysis of I‐beams with web corrugation.},
	year = {2023},
	eissn = {2509-7075},
	pages = {1705-1710}
}

@article{MTMT:33767614,
	title = {Lateral-torsional buckling assessment of I-beams with sinusoidally corrugated web},
	url = {https://m2.mtmt.hu/api/publication/33767614},
	author = {Hajdú, Gábor and Pasternak, Hartmut and Papp, Ferenc},
	doi = {10.1016/j.jcsr.2023.107916},
	journal-iso = {J CONSTR STEEL RES},
	journal = {JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH},
	volume = {207},
	unique-id = {33767614},
	issn = {0143-974X},
	year = {2023},
	eissn = {1873-5983}
}

@article{MTMT:33756040,
	title = {Elasto-plastic analysis and optimal design of composite integral abutment bridge extended with limited residual plastic deformation},
	url = {https://m2.mtmt.hu/api/publication/33756040},
	author = {Movahedi Rad, Majid and Papp, Ferenc and Ibrahim, Sarah Khaleel and Szép, János and Gosztola, Dániel and Harrach, Dániel},
	doi = {10.1038/s41598-023-32787-y},
	journal-iso = {SCI REP},
	journal = {SCIENTIFIC REPORTS},
	volume = {13},
	unique-id = {33756040},
	issn = {2045-2322},
	abstract = {Due to the growing significance of structural theories concerning the composite structure analysed and designed plastically, this paper introduces a new optimisation method for controlling the plastic behaviour of a full-scale composite integral abutment bridge by employing complementary strain energy of residual forces that existed within the reinforcing rebars. Composite bridges are structures made of components such as steel and concrete, which are frequent and cost-effective building methods. Thus, various objective functions were used in this work when applying optimum elasto-plastic analysing and designing the composite integrated bridge structure that was tested experimentally in the laboratory. In contrast, the plastic deformations were constrained by restricting the complementary strain energy of the residual internal forces aiming to find the maximum applied load and the minimum number of steel bars used to reinforce the concrete column part of the structure. The numerical model employed in this paper was validated and calibrated using experimental results, which were considered inside ABAQUS to produce the validated numerical model, using concrete damage plasticity (CDP) constitutive model and concrete data from laboratory testing to solve the nonlinear programming code provided by the authors. This paper presents a novel optimization method using complementary strain energy to control the plastic behaviour of a full-scale composite integral abutment bridge, with the original contribution being the incorporation of residual forces within reinforcing rebars to limit plastic deformations. Following that, a parametric investigation of the various optimisation problems revealed how models performed variously under different complementary strain energy values, which influenced the general behaviour of the structure as it transitioned from elastic to elasto-plastic to plastic; also results showed how the complementary strain energy value is connected with the amount of damaged accrued in both concrete and steel.},
	year = {2023},
	eissn = {2045-2322}
}

@article{MTMT:33678493,
	title = {The overall imperfection method for fire design situation},
	url = {https://m2.mtmt.hu/api/publication/33678493},
	author = {Nemer, Samer and Szalai, József A. and Papp, Ferenc},
	doi = {10.1016/j.engstruct.2023.115884},
	journal-iso = {ENG STRUCT},
	journal = {ENGINEERING STRUCTURES},
	volume = {283},
	unique-id = {33678493},
	issn = {0141-0296},
	year = {2023},
	eissn = {1873-7323}
}

@inbook{MTMT:33296311,
	title = {Többtámaszú öszvér gerenda numerikus vizsgálata},
	url = {https://m2.mtmt.hu/api/publication/33296311},
	author = {Hajdú, Gábor and Papp, Ferenc},
	booktitle = {Kutatás-fejlesztés a hídépítésben},
	unique-id = {33296311},
	year = {2022},
	pages = {29-40}
}

@article{MTMT:32859714,
	title = {On the accuracy of general method adapted in EN 1993-1-1},
	url = {https://m2.mtmt.hu/api/publication/32859714},
	author = {Hajdú, Gábor and Papp, Ferenc},
	doi = {10.1016/j.jcsr.2022.107354},
	journal-iso = {J CONSTR STEEL RES},
	journal = {JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH},
	volume = {195},
	unique-id = {32859714},
	issn = {0143-974X},
	year = {2022},
	eissn = {1873-5983}
}

@article{MTMT:32852952,
	title = {Digital image processing method for evaluation of discoloration on fair-faced concrete surfaces},
	url = {https://m2.mtmt.hu/api/publication/32852952},
	author = {Ajtayné Károlyfi, Kitti and Horváth, András and Papp, Ferenc},
	doi = {10.14382/epitoanyag-jsbcm.2022.11},
	journal-iso = {ÉPÍTŐANYAG-JSBCM},
	journal = {ÉPÍTŐANYAG: JOURNAL OF SILICATE BASED AND COMPOSITE MATERIALS},
	volume = {74},
	unique-id = {32852952},
	issn = {0013-970X},
	abstract = {In the case of fair-faced concrete surfaces the architect is responsible for defining the aesthetical requirements, the applicable examination methods and the conformity criterias. The surface quality can be defined by using the national or international standards and guidelines or by setting up specific evaluation aspects and methods. However, regarding the variety of these surfaces, the assessment can be very subjective in some cases and depends on the culture of the given country, especially when considering the discoloration. This paper presents an evaluation method for discoloration of the fair-faced concrete surfaces using digital image processing techniques. The program was written in Python, as a part of a more extensive project including further evaluation aspects of these surfaces. The method was tested on 24 concrete surfaces. Results show, that the changes in concrete composition or in the dimensions of the sample can be observed in the colour tone of the surface, however the automatic method should be supported by subjective evaluation to get the right classification.},
	keywords = {surface quality; Discoloration; fair-faced concrete},
	year = {2022},
	eissn = {2064-4477},
	pages = {67-70}
}

@article{MTMT:32530230,
	title = {The use of the Overall Imperfection Method for fire design situation},
	url = {https://m2.mtmt.hu/api/publication/32530230},
	author = {Szalai, József and Nemer, Samer and Papp, Ferenc},
	doi = {10.2139/ssrn.3866475},
	journal-iso = {SOC SCI RES NETW (SSRN)},
	journal = {SOCIAL SCIENCE RESEARCH NETWORK: SSRN},
	volume = {2021},
	unique-id = {32530230},
	year = {2021},
	eissn = {1556-5068}
}

@article{MTMT:32330285,
	title = {Numerical Investigation on Flexural Buckling Behavior of Hot-rolled Steel Columns at Elevated Temperatures},
	url = {https://m2.mtmt.hu/api/publication/32330285},
	author = {Nemer, Samer and Papp, Ferenc},
	doi = {10.3311/PPci.17799},
	journal-iso = {PERIOD POLYTECH CIV ENG},
	journal = {PERIODICA POLYTECHNICA-CIVIL ENGINEERING},
	volume = {65},
	unique-id = {32330285},
	issn = {0553-6626},
	abstract = {In this paper, a numerical investigation on the global buckling capacity of the axially compressed steel columns with hot-rolled I cross-section at elevated temperatures is presented. Geometrically and materially non-linear finite element model and the ABAQUS software were used to determine the buckling resistance. The numerical ABAQUS model was validated using experimental results available in the literature, and then the validated numerical model was used to generate a database of load-carrying capacity. The parametric study covered three different cross-section classes (class 1, 2 and 3), ten different non-dimensional slenderness (lambda)over bar = 0.5, 0.6, 0.7, 0.9, 1.1, 1.3, 1.5, 1.7, 1.9, 2.0), three different temperatures (400 degrees C, 500 degrees C, 600 degrees C), and two stress-strain constitutive relations including (the nonlinear material model adopted in the European guidance for structural fire design EN1993-1-2, and a Bilinear material model), with and without residual stress. The influence of the model parameters on the load capacity of steel columns at elevated temperatures was evaluated. The results of the parametric study were compared with the results of the simplified calculation model presented in EN1993-1-2.},
	keywords = {buckling; STEEL; COLUMNS; elevated temperatures; fire design},
	year = {2021},
	eissn = {1587-3773},
	pages = {918-927}
}