SEISMIC PERFORMANCE-BASED TOPOLOGY OPTIMIZATION AND COLLAPSE ANALYSIS OF STEEL SHEAR WALL SYSTEMS

The use of steel shear wall systems has increased significantly in recent years as an effective solution for resisting lateral loads in buildings. This study focuses on the seismic collapse safety assessment of steel frames with optimal positions of steel shear walls obtained through various metaheuristic optimization algorithms and concepts of performance-based design methodology. Due to potential irregularities and discontinuities in the lateral load-resisting system and the limitations of code-based linear analysis, nonlinear pushover analyses with multiple lateral load patterns are employed to estimate key structural responses during the optimization process. The seismic collapse performance of the optimized frames is further evaluated using the FEMA P-۶۹۵ methodology, which involves nonlinear dynamic analysis to assess collapse capacity. The primary objective is to examine the influence of steel plate shear wall placement on the structural weight optimization of steel frames. To this end, two case studies, a ۱۰-story and a ۱۵-story steel frame equipped with steel shear walls, are presented. The results demonstrate the critical role of shear wall location in achieving optimal structural designs.

کلیدواژه ها:

Steel shear wall system ، incremental dynamic analysis ، performance-based design ، metaheuristic algorithms ، structural shape optimization