钢连梁剪切屈服型混合连肢墙体系节点滞回性能有限元分析

FEM Analysis on Hysteretic Behavior of Shear-critical Steel Coupling Beam-column Connection in Hybrid Coupled Shear Wall System

在高层建筑连肢墙体系的设计中,为了提高钢筋混凝土连续梁的抗震性能,其设计和施工的难度相应增加,因此采用型钢连梁代替钢筋混凝土连梁。为了研究这种新型结构体系节点的滞回性能,采用有限元软件ABAQUS建立钢连梁剪切屈服型混合连肢墙的非线性有限元模型,对钢连梁在循环荷载作用下的滞回性能、核心区应力分布进行了分析,并且考虑了轴压比和腹板高厚比的影响。研究结果表明,该节点具有良好的抗震性能,适合在高烈度高层建筑结构中使用。

Steel coupling beams are substituted for the reinforced concrete beams to improve the seismic behavior of coupled shear wall system and overcome the difficulties of design and construction of the latter.The nonlinear finite element model of shear-critical coupling beam-wall connection in a hybrid coupled shear wall is developed by FEM software ABAQUS for numerical simulation in this article,so as to obtain the hysteresis response and the stress distribution in core region under cyclic loading by the analysis on steel coupling beams,and the main parameters are investigated to find out their influence on the hysteretic behavior of the connection,such as the axial compression ratio and the height-to-thickness ratio of web.The analytical results show that this kind of connection has high seismic performance,and is suitable for using in high-rise buildings in high-intensity earthquake areas.