高烈度区大型商业结构抗震性能研究

Seismic performance research of large commercial structure in high seismic region

大型商业建筑使用功能多、平面布置与造型较为复杂,其结构一般具有凹凸不规则、楼板不连续、抗侧力构件不连续等不利因素。罕遇地震作用下,结构塑性发展导致其内力重分布,高烈度区结构尤甚,弹性分析无法反映其结构性能,需进行动力弹塑性时程分析来进一步判断结构的抗震性能。本文旨在通过大震动力弹塑性时程分析结果,判定结构薄弱部位,采取有效加强措施,供高烈度区商业框架-剪力墙结构设计参考。

Large commercial buildings have many functions, complex layout and architectural modelling, and there are some adverse factors such as irregular concave-convex, discontinuous floor slabs and discontinuous side-force resistant components for building structure. Under infrequent seismic actions, the redistribution of internal forces is led by the development of structural plasticity, especially for structures in high-intensity regions. The structural performance cannot be reflected by the elastic analysis, and dynamic elastic-plastic time history analysis is needed to further determine the seismic performance of structures. The purpose of this paper is to determine the weak parts of the structure and take effective strengthening measures through the results of dynamic elastic-plastic time history analysis of severe earthquakes, so as to provide a reference for the design of commercial frame-shear wall structures in high-intensity areas.