TY - JOUR AU - Cserpes, Imre AU - Habashneh, Muayad AU - Szép, János AU - Movahedi Rad, Majid TI - Innovative Design Techniques for Sinusoidal-Web Beams: A Reliability-Based Optimization Approach JF - BUILDINGS J2 - BUILDINGS-BASEL VL - 14 PY - 2024 IS - 4 SP - 1051 SN - 2075-5309 DO - 10.3390/buildings14041051 UR - https://m2.mtmt.hu/api/publication/34780021 ID - 34780021 AB - Existing studies often rely on deterministic numerical analyses for structural models. However, test results consistently highlight uncertainties, particularly in variables such as magnitude of the applied load, geometrical dimensions, material randomness, and limited experiential data. As a response, researchers have increasingly turned their attention to probabilistic design models, recognizing their crucial role in accurately predicting structural performance. This study aims to integrate reliability-based analysis into the numerical modeling of sinusoidal-web steel beams. Two sinusoidal-web beams are considered. The web and the flange thicknesses, in addition to the magnitude of the applied load, are treated as random variables with mean values and standard deviations. Notably, the study demonstrates the efficiency of the reliability index as a governing limit in the analysis process. A detailed comparison between deterministic and probabilistic designs of sinusoidal-web beams is conducted, focusing on the impact of introducing the nature of randomness. Therefore, this study’s results deepen our understanding of how uncertainties significantly influence deformations and stresses. LA - English DB - MTMT ER - TY - JOUR AU - Shafaie, Vahid AU - Ghodousian, Oveys AU - Ghodousian, Amin AU - Cucuzza, Raffaele AU - Movahedi Rad, Majid TI - Integrating push-out test validation and fuzzy logic for bond strength study of fiber-reinforced self-compacting concrete JF - CONSTRUCTION AND BUILDING MATERIALS J2 - CONSTR BUILD MATER VL - 425 PY - 2024 SN - 0950-0618 DO - 10.1016/j.conbuildmat.2024.136062 UR - https://m2.mtmt.hu/api/publication/34763222 ID - 34763222 LA - English DB - MTMT ER - TY - JOUR AU - Szép, János AU - Habashneh, Muayad AU - Movahedi Rad, Majid TI - Enhancing Fire-Resistant Design of Reinforced Concrete Beams by Investigating the Influence of Reliability-Based Analysis JF - ENGINEERING REPORTS J2 - ENG REP VL - 2 PY - 2024 SP - 1 EP - 15 PG - 15 SN - 2577-8196 DO - 10.1002/eng2.12879 UR - https://m2.mtmt.hu/api/publication/34730400 ID - 34730400 LA - English DB - MTMT ER - TY - JOUR AU - Haji Mohammadi, Marziyeh AU - Shafaie, Vahid AU - Nazari Samani, Aliakbar AU - Zare Garizi, Arash AU - Movahedi Rad, Majid TI - Assessing Future Hydrological Variability in a Semi-Arid Mediterranean Basin: Soil and Water Assessment Tool Model Projections under Shared Socioeconomic Pathways Climate Scenarios JF - WATER J2 - WATER-SUI VL - 16 PY - 2024 IS - 6 SP - 805 SN - 2073-4441 DO - 10.3390/w16060805 UR - https://m2.mtmt.hu/api/publication/34727308 ID - 34727308 AB - Climate is one of the main drivers of hydrological processes, and climate change has caused worldwide effects such as water scarcity, frequent floods and intense droughts. The purpose of this study was to analyze the effects of climate change on the water balance components, high flow and low flow stream conditions in a semi-arid basin in Iran. For this reason, the climate outputs of the CanESM5 model under Shared Socioeconomic Pathways (SSP) scenarios SSP126, SSP245, and SSP585 were spatially downscaled by the Statistical Downscaling Model (SDSM). The hydrological process was simulated by the Soil and Water Assessment Tool (SWAT) model. Key findings include a 74% increase in evapotranspiration, a reduction by up to 9.6% in surface runoff, and variations in discharge by up to 53.6%. The temporal analysis of snow melting changes revealed an increase in the volume of snow melting during winter months and a reduction in the volume during spring. The projected climate change is expected to cause notable variations in high and low flow events, particularly under the SSP585 scenario, which anticipates significant peaks in flow rates. This comprehensive analysis underscores the pressing need for adaptive strategies in water resource management to mitigate the anticipated impacts of climate variability. LA - English DB - MTMT ER - TY - JOUR AU - Domaneschi, M. AU - Cucuzza, R. AU - Sardone, L. AU - Lopez, S. Londoño AU - Movahedi Rad, Majid AU - Marano, G. C. TI - Numerical Covariance Evaluation for Linear Structures Subject to Non-Stationary Random Inputs JF - COMPUTATION J2 - COMPUTATION VL - 12 PY - 2024 IS - 3 SN - 2079-3197 DO - 10.3390/computation12030050 UR - https://m2.mtmt.hu/api/publication/34721098 ID - 34721098 AB - Random vibration analysis is a mathematical tool that offers great advantages in predicting the mechanical response of structural systems subjected to external dynamic loads whose nature is intrinsically stochastic, as in cases of sea waves, wind pressure, and vibrations due to road asperity. Using random vibration analysis is possible, when the input is properly modeled as a stochastic process, to derive pieces of information about the structural response with a high quality (if compared with other tools), especially in terms of reliability prevision. Moreover, the random vibration approach is quite complex in cases of non-linearity cases, as well as for non-stationary inputs, as in cases of seismic events. For non-stationary inputs, the assessment of second-order spectral moments requires resolving the Lyapunov matrix differential equation. In this research, a numerical procedure is proposed, providing an expression of response in the state-space that, to our best knowledge, has not yet been presented in the literature, by using a formal justification in accordance with earthquake input modeled as a modulated white noise with evolutive parameters. The computational efforts are reduced by considering the symmetry feature of the covariance matrix. The adopted approach is applied to analyze a multi-story building, aiming to determine the reliability related to the maximum inter-story displacement surpassing a specified acceptable threshold. The building is presumed to experience seismic input characterized by a non-stationary process in both amplitude and frequency, utilizing a general Kanai–Tajimi earthquake input stationary model. The adopted case study is modeled in the form of a multi-degree-of-freedom plane shear frame system. LA - English DB - MTMT ER - TY - JOUR AU - Shafaie, Vahid AU - Movahedi Rad, Majid TI - Multi-objective genetic algorithm calibration of colored self-compacting concrete using DEM: an integrated parallel approach JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 14 PY - 2024 IS - 1 SN - 2045-2322 DO - 10.1038/s41598-024-54715-4 UR - https://m2.mtmt.hu/api/publication/34636137 ID - 34636137 AB - A detailed numerical simulation of Colored Self-Compacting Concrete (CSCC) was conducted in this research. Emphasis was placed on an innovative calibration methodology tailored for ten unique CSCC mix designs. Through the incorporation of multi-objective optimization, MATLAB's Genetic Algorithm (GA) was seamlessly integrated with PFC3D, a prominent Discrete Element Modeling (DEM) software package. This integration facilitates the exchange of micro-parameter values, where MATLAB’s GA optimizes these parameters, which are then input into PFC3D to simulate the behavior of CSCC mix designs. The calibration process is fully automated through a MATLAB script, complemented by a fish script in PFC, allowing for an efficient and precise calibration mechanism that automatically terminates based on predefined criteria. Central to this approach is the Uniaxial Compressive Strength (UCS) test, which forms the foundation of the calibration process. A distinguishing aspect of this study was the incorporation of pigment effects, reflecting the cohesive behavior of cementitious components, into the micro-parameters influencing the cohesion coefficient within DEM. This innovative approach ensured significant alignment between simulations and observed macro properties, as evidenced by fitness values consistently exceeding 0.94. This investigation not only expanded the understanding of CSCC dynamics but also contributed significantly to the discourse on advanced concrete simulation methodologies, underscoring the importance of multi-objective optimization in such studies. LA - English DB - MTMT ER - TY - JOUR AU - Hosseini, SeyedSaber AU - Astaraki, Farshad AU - Imam, Seyed Mohammad Reza AU - Chalabi, Jafar AU - Movahedi Rad, Majid TI - Investigation of Shear Strength Reduction Method in Slope Stability of Reinforced Slopes by Anchor and Nail JF - BUILDINGS J2 - BUILDINGS-BASEL VL - 14 PY - 2024 IS - 2 SN - 2075-5309 DO - 10.3390/buildings14020432 UR - https://m2.mtmt.hu/api/publication/34617143 ID - 34617143 AB - Since the stability of slopes in infrastructures such as road and railroad embankments, excavations, and, in general, earthwork is important, analyzing the stability of these slopes has been one of the main focuses of geotechnical engineers. Although analyzing both reinforced and unreinforced slopes is needed, reinforced slopes require special attention as the reinforcement elements significantly affect the calculations. Hence, the current study’s aim is to find out the differences between obtained safety factors using the Limit Equilibrium Method (LEM) and Shear Strength Reduction Method (SSRM). For this purpose, first, the origin differences in terms of Safety Factor (SF) are theoretically determined according to basic formulas for the aforementioned techniques. Then, to verify the formula, several numerical modelings are carried out using in situ measured geotechnical data to better understand the differences in terms of safety factors. The results indicate that for the reinforced slope with an SF value of higher than 1, the SSRM provides a higher SF in comparison with the other techniques, and the origin of this difference is the definitions of the SF in the different methods. LA - English DB - MTMT ER - TY - JOUR AU - Habashneh, Muayad AU - Cucuzza, Raffaele AU - Domaneschi, Marco AU - Movahedi Rad, Majid TI - Advanced elasto-plastic topology optimization of steel beams under elevated temperatures JF - ADVANCES IN ENGINEERING SOFTWARE J2 - ADV ENG SOFTW VL - 190 PY - 2024 SN - 0965-9978 DO - 10.1016/j.advengsoft.2024.103596 UR - https://m2.mtmt.hu/api/publication/34579598 ID - 34579598 LA - English DB - MTMT ER - TY - JOUR AU - Habashneh, Muayad AU - Movahedi Rad, Majid TI - Plastic-limit probabilistic structural topology optimization of steel beams JF - APPLIED MATHEMATICAL MODELLING J2 - APPL MATH MODEL VL - 128 PY - 2024 SP - 347 EP - 369 PG - 23 SN - 0307-904X DO - 10.1016/j.apm.2024.01.029 UR - https://m2.mtmt.hu/api/publication/34529909 ID - 34529909 N1 - Export Date: 21 February 2024 CODEN: AMMOD Correspondence Address: Movahedi Rad, M.; Department of Structural and Geotechnical Engineering, Hungary; email: majidmr@sze.hu LA - English DB - MTMT ER - TY - JOUR AU - Habashneh, Muayad AU - Movahedi Rad, Majid TI - Optimizing structural topology design through consideration of fatigue crack propagation JF - COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING J2 - COMPUT METHOD APPL M VL - 419 PY - 2024 SN - 0045-7825 DO - 10.1016/j.cma.2023.116629 UR - https://m2.mtmt.hu/api/publication/34397436 ID - 34397436 N1 - Export Date: 22 January 2024 CODEN: CMMEC Correspondence Address: Movahedi Rad, M.; Department of Structural and Geotechnical Engineering, Hungary; email: majidmr@sze.hu LA - English DB - MTMT ER -