常州金融中心结构为B级高度的高层单塔结构,位于7度抗震区。结构体系采用框架核心筒,并在外框设置巨型钢支撑加强结构的抗侧力性能。为了充分把握结构在罕遇地震作用下的性能,采用专用弹塑性分析软件PERFORM-3D对结构进行非线性时程分析,并应用有限元软件ABAQUS进行了补充验算。分析结果表明:连梁率先进入非线性状态,消耗较多地震能量;结构主要抗侧力只发生轻微损伤;最大位移角小于1/100,结构具有良好的抗震性能和安全储备,满足"大震不倒"抗震性能要求。
Changzhou Financial Center is a single tower high structure with B grade height,located in 7 degree anti-seismic zone. Frame-core tube is applied in the structure,adding huge steel brace to strengthen the lateral force resisting system. In order to understand the structural performance,Perform-3D software is used to do nonlinear time-history analysis for this structure,and the contrast and checking computations are made by using the nonlinear finite element software ABAQUS. The result shows that coupling beams step into nonlinear state,consuming more seismic energy. Main lateral resisting members are only damaged slightly. The results also show that the maximum layer displacement angle is less than 1/100. The structure has good seismic performance and safety margin,meeting the requirements of no collapsing in the severe earthquake.