天津站交通枢纽-桩-土地震反应分析

Seismic Response Analysis of Tianjin Transportation Junction-Pile-Soil System

为摸清大型复杂工程结构的地震反应规律及抗震性能,针对天津站交通枢纽工程,选取包括地上和地下结构的标段,应用大型通用有限元分析软件ANSYS,将桩土区域等效连续化成桩土合一的复合材料,建立了结构-桩-土相互作用的天津站交通枢纽工程的三维有限元模型,并采用非线性动力时程分析方法进行计算.结果表明,天津波作用下交通枢纽地震反应最大,并且各层加速度反应沿地下结构长度方向分布均匀,位移反应小于规范限值,说明天津站交通枢纽工程整体性好,具有良好的抗震性能.

In order to understand the rules of the seismic response and seismic performance of the large complex structure,a three-dimensional structure-pile-soil finite element model of Tianjin transportation junction which include ground and underground structures was established by using the ANSYS software.In the model,an equivalent composite material was used to replace the pile-soil area.The nonlinear time history analysis was adopted to calculate the finite element model.The result shows that the maximum seismic responses of the structure occur under Tianjin wave,and the acceleration responses are evenly distributed,and that the displacement responses are less than the limitation.So the Tianjin transportation junction has favorable integrity and seismic performance.