竖向不规则结构的抗震性能评估

摘要：本文基于模态Pushover方法和等强度延性需求谱理论，给出了竖向不规则结构评估的方法和步骤。通过模态Pushover方法，以考虑竖向不规则结构在地震作用下高振型的影响，利用等强度延性需求谱对等效单自由度体系进行计算，得到其延性和位移需求，并转化为多自由度体系的位移需求。利用上述方法对典型的竖向不规则结构算例进行了分析计算，结果表明该方法能够有效应用于竖向不规则结构的计算。

Seismic performance evaluation for a vertical irregular structure

Based on the modal pushover analysis (MPA) and the constant-strength ductility demand spectrum method, the basic solving process of a vertical irregular structure was put forward. Using the modal pushover analysis, the influence of higher modes could be taken into account. Using the constant-strength ductility demand spectrum method, the ductility and displacement demand of the equivalent single degree of freedom system were obtained, then they were trans- lated into the displacement demand of a muhi-degree of freedom system. Using these methods the examples of typical ir- regular vertical structures were analyzed, the results demonstrated that these methods could be used in the seismic per- formance calculation of a vertical irregular structure effectively.