Analysis of the seismic performance of mixed-structure buildings

This study fills a major gap in seismic design by analyzing the optimal location of walls the ideal wall/floor ratio and their relationship to building height through non-linear static and dynamic analyses. It adopts a performance-based approach to improving the seismic resistance of structures. The results show that increasing the web ratio improves stiffness and reduces inter-storey displacements. For example a ratio of 1.0% is recommended for a 7-storey building compared with 1.5% for a 14-storey building. However exceeding these thresholds becomes uneconomical. The study also revealed that concentrating voiles in the center of the structure particularly in complete configurations (U L Box) enhances performance whereas partial voiles can cause deterioration of elements such as short beams. These findings underline the relevance of non-linear analyses in seismic design optimization.