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采用三维虚拟层合单元非线性有限元分析方法,经对一个两跨四层RC框架分析算例验证后,分别对三种轴压比RC框架和剪力墙抗侧性能进行模拟分析,分析结果表明,轴压比越大侧移刚度退化速率越快;构建三个不同刚度特征值的四层框架-剪力墙结构空间模型并进行抗侧性能仿真分析,发现进入非线性阶段后,框架分担水平剪力比例随水平荷载增大而提高,且结构刚度特征值越大提幅越多,极限荷载时分担比例提至其初始值2倍以上。分析结果还表明,现行规范关于框架-剪力墙结构框架分担楼层剪力的调整规定取值偏低。
The three-dimensional virtual laminated element nonlinear finite element analysis method is used to simulate and analyze the anti-side performance of RC frame and shear wall of three kinds of axial compression ratio after validating a two-span and four-story RC frame. The results show that the bigger the axial compression ratio is, the faster the degradation rate of the lateral stiffness is. The three-dimensional frame-shear wall structure model with three different stiffness eigenvalues is constructed and the anti-lateral performance simulation is conducted. It is found that after the non-linear phase is reached, The ratio of horizontal shear increases with the increase of horizontal load, and the larger the characteristic value of structural stiffness, the more the proportion of ultimate load is increased to more than twice its initial value. The results of the analysis also show that the current regulation on the adjustment of the frame-shear wall structure to share the floor shear force is low.