应用SAP2000程序进行剪力墙非线性时程分析

为研究用于结构地震反应分析与抗震设计的剪力墙单元非线性性能的动力分析模型,对SAP2000程序中的Link单元进行了矩阵分析与力学参数研究。推导了SAP2000中Link单元的刚度矩阵,明确了各弹簧属性的物理意义,给出了弹簧线性等效刚度、相对转动中心高度和力位移关系的确定方法。对3个不同截面形状的剪力墙试件采用Link单元进行简谐动力荷载作用下的非线性时程分析的计算结果与清华大学土木工程系对这3片墙的拟静力试验得到的水平力位移滞回曲线的骨架线符合良好。这说明用Link单元可以较好地模拟剪力墙的动力非线性行为。

Nonlinear time-history analysis of isolated shear walls using SAP2000

Shear walls are important lateral load-resisting elements but the nonlinear dynamic behavior of shear walls is difficult to simulate appropriately. This paper presents a matrix analysis and parameter study of shear walls using the Link element in SAP2000. A parameter defining method was developed for the Link element nonlinear time-history analysis to determine the location of the shear spring, the linear effective stiffness and the force-displacement relationship for all springs in the Link element. The nonlinear time-history responses of 3 isolated shear wall specimens agreed well with available experimental results. Therefore, the Link element can accurately model the nonlinear properties of isolated shear walls.