剪力墙结构的非线性地震反应分析

本文在多垂直杆单元的基础上,提出了一种能反映剪力墙剪切刚度随正应力变化的简化模型,并对刚度矩阵进行了修正,这一模型与实际结构受力更加符合。结合二弹簧杆单元模型及翼缘展开法,分析了带翼缘墙体的开洞剪力墙的非线性地震反应。最后,提供了一个算例,并与试验结果比较,表明该模型具有较好的计算精度。

NONLINEAR SEISMIC RESPONSE TO SHEAR WALL STRUCTURES

The nonlinear seismic response to the shear wall structures is studied and a simplified model is proposed in the paper. It is based on the multi-vertical-line-element; it can reflect that the shearing stiffness of the walls is varied with the normal stress. The stiffness matrix is modified; it is more close to the structural behavior. Combined with two-spring element model and unfolding flanges method, the nonlinear seismic response of a shear wall with openings and flanges is analyzed. At last, an example is included; it is compared with that of the test. The results are shown that the proposed model has a relatively well accuracy.