钢管混凝土框架-RC剪力墙混合结构滞回性能分析

为了研究带钢管混凝土边柱钢筋混凝土(RC)剪力墙的抗震性能，在其他研究者完成的带钢管混凝土边柱RC剪力墙和普通钢筋混凝土剪力墙滞回性能试验结果的基础上，采用开源非线性分析程序OpenSees平台中的非线性纤维模型对其进行了低周往复试验的数值模拟，通过直接在截面层次定义非线性剪切恢复力的方法来模拟纤维截面的抗剪。计算结果与实测结果总体吻合较好，研究表明：这种考虑剪切效应的纤维模型法能够较好的模拟该类组合剪力墙的抗剪承载力、捏缩效应以及刚度退化，而且运算效率较高。

Hysteresis behavior analysis of the mixed structures with concrete-filled steel tubular frame and RC shear wall

In order to study the seismic performance of the reinforced concrete (RC) shear walls with concrete-filled steel tubular (CFST) columns, the Open System for Earthquake Engineering Simulation (OpenSees), a open-source nonlinear analysis platform, was used to simulate the performance of this type of composite shear wall under low cyclic loading with nonlinear beam-column fiber model based on the other researchers’ experiments about the RC shear walls framed with CFST columns and RC shear walls, respectively. The shear force of fiber sections was simulated by defining the nonlinear shear restoring force in section level. The results obtained from the calculation are in good agreement with those from the experiment. The results show that the fiber modeling method of considering the shear effect could predict the maximum shear force, pinch effect and stiffness degradation of the composite shear walls effectively, and it can also save a lot of computing time because of its high arithmetic efficiency.