成都某不对称连体高层弹塑性分析与振动台试验

Nonlinear analysis and shaking table test for an unsymmetrical twin-tower high-rise building in Chengdu

一平面及立面均不规则的不对称连体高层建筑结构采用框架-剪力墙结构体系,通过EPDA软件进行了三维弹塑性时程分析,对揭示出的薄弱部位进行了重点加强,对关键构件进行大震下的配筋复核与设计。在完成数值计算后,又进行了1∶30缩尺的整体模型振动台试验,得到了结构的动力特性、位移反应、楼层的最大位移与平均位移之比以及在各级地震下结构的裂缝开展情况。试验结果表明:虽然结构存在刚度突变、扭转不规则及楼板大开洞这三项超限情况,但通过分析及合理设计,并采取抗震加强措施,能使结构满足预设的性能目标。

Frame-shear wall system was adopted in the structure of an unsymmetrical twintower high-rise building with irregular plane and elevation.The weak zones identified by the three-dimensional elastic-plastic time-history analysis with EPDA were strengthened,and the reinforcements of key members were rechecked and redesigned according to the results under large earthquakes.After the numerical computation,the shaking table test of a 1∶30 scaled model was carried out,the dynamic characteristics,displacements,the ratio between maximum and average displacements and the cracks under different magnitude earthquakes were obtained.The test results show that although there were 3 irregularities in the structure which were stiffness mutation,irregular plane and large opening in floor,the structure can satisfy the pre-set performance objectives through rational design and seismic measures.