关键词: 高层建筑, 支护结构, 试验分析, 抗震性能

Abstract: In order to study the seismic performance of the deep foundation pit support and pressure bearing structure of high-rise buildings under earthquake, a seismic test analysis was conducted on such bearing structure to achieve the optimal design of the deep foundation pit support and pressure bearing structure based on the test results. Based on a high-rise deep foundation pit construction project, test specimens were made and finite element numerical simulation software was used to establish a calculation model for the deep foundation pit support pressure bearing structure. Combined with seismic shaking table in simulation of the seismic environment, ductility, stiffness, and bearing capacity indicators that could reflect the seismic effect of the structure were calculated through inputting seismic waves. Therefore, the seismic performance of the support structure was analyzed based on the test results. The experimental results indicated that the deeper the deep foundation pit, the higher the ductility of the structure and the better its seismic performance, the higher the elevation of the underground diaphragm wall of the deep foundation pit support pressure bearing structure, the greater the lateral stiffness of the foundation pit support, and the better the seismic effect. When the structural slope ratio was 0.8, the seismic performance of the structure was optimal.

Key words: high-rise buildings, supporting and pressure bearing structures, test analysis, seismic performance