【摘要】 采用三维实体退化虚拟层合单元非线性有限元分析法对一单跨3层RC框架进行仿真分析并与其试验结果对比验证之后,模拟分析了3个双跨两层不对称布置的RC框架-剪力墙结构空间模型在不同等级水平荷载作用下的全过程受力性能,得出了加载后期框架分担水平剪力比例明显增大,且框架距离剪力墙越远其分担剪力比例越大;随着荷载增大,剪力墙抗侧刚度退化速率逐步加快,框架刚度退化呈台阶式减慢;加载初期,结构"刚心"略向剪力墙位置方向偏移,加载中后期,结构"刚心"向远离剪力墙位置方向移动;结构设计强调"对称布置"和"二道防线"十分重要等研究结论。更多还原

【Abstract】 The nonlinear finite element method based on degenerated three-dimensional solid virtual laminated element theory,which validity and efficiency were proved by analysis on a single-span and three-story RC frame failure test.Based on the method,by analyzing the whole process loaded behaviour of three twospan and two-story RC frame-shear wall structure space models with asymmetric arrangements under horizontal load of different levels,some conclusions are obtained,such as,frame structures sharing ratio of horizontal shear in the late loading phase is obviously increased,and the larger the distance the frame structure away from the shear wall,the greater the frame structure sharing ratio of horizontal shear;with the increase of the horizontal load,the lateral stiffness degradation rate of the shear wall is gradually accelerated,and the lateral stiffness degradation of the frame structures is slowed down stepwise;in the early loading phase,the structure"stiffness center"slightly shift to the direction of the shear wall,and the "stiffness center"move away from the shear wall position in the middle and late loading phase;it is very important to emphasize"symmetrical arrangement"and"two lines of defense"in structural design,and so on.更多还原