利用钢板剪力墙耗能的自复位结构有限元模拟

为了解利用钢板剪力墙耗能的自复位结构体系的抗震性能,采用ANSYS软件对结构在低周往复荷载作用下的抗震性能进行了模拟,并与试验数据进行对比,分析了滞回曲线、残余变形、内填薄钢板的应力等指标。此后设计PTA系列模型,研究钢绞线截面面积对结构的影响。结果表明,有限元模拟与试验结果基本吻合,模拟试件到达倒塌位移时的残余变形与试验结果相差0.03%;内填板先于框架进入塑性,起到足够的耗能作用;当结构到达倒塌位移时,梁柱还未失效,梁柱节点处有很微小的面积进入塑性;钢绞线截面面积的增大,对结构的延性和复位能力的增强是有利的。

The finite element simulation of self-centering structure by using the energy dissipation of steel plate shear walls

In order to understand the seismic performance of the self-ceentering structure by using the energy dissipation of the steel plate shear walls, the seismic performance of the structure was simulated under the low cycle reciprocating loading by ANSYS, and the test data was compared. The hysteresis curve, residual drifts and the stress of the infill plate were analyzed. Then the PTA series model was designed to study the impact of the strand＇s area on the structure. The results indicate that the finite element model data basically agrees with the result of the experiment. The simulation specimen of the residual drift after the 2% drift cycle is 0.03% larger than the experiment. The infill plate enters into the plastic before the boundary elements, which has enough capacity of energy dissipation. After the 2% drift cycle, the boundary elements are still working, and some very small ar- eas of beam-to-column connections begin to be plastic. The increase in the area of PT strands will be advantageous for the ductility of the structure and the enhancement of the reeentering.