钢框架内填混凝土剪力墙结构有限元分析

半刚性节点钢框架内填钢筋混凝土剪力墙(SRCW)结构融合了钢框架和钢筋混凝土剪力墙两种结构的优点,是一种极具应用前景的新型抗震结构体系。目前,SRCW结构的有限元分析多局限于线弹性阶段。为了系统地研究该结构的滞回性能和传力机理,采用ANSYS软件建立非线性有限元模型的基本过程和方法,在验证有限元模型的基础上,从整体性能、传力机理、延性、耗能等方面进行分析评价。结果表明:SRCW结构具有较高的侧向承载力和强度储备;在循环荷载作用下,结构表现出良好的延性和耗能能力;钢框架承担80%～100%的倾覆弯矩,剪力墙承担80%～90%的侧向力。最后提出了抗震设计建议。

FINITE ELEMENT ANALYSIS OF STEEL FRAME-REINFORCED CONCRETE INFILL WALL STRUCTURE

The semi-rigid steel frame-reinforced concrete infill wall structure(SRCW),which combines advantages of a steel frame and a shear wall,is considered as a new type of aseismatic structure with a brilliant future.The FEM study on SRCW structure was localized on the linear elastic stage so far.In order to study seismic behavior and force distribution in the structural system of the SRCW,the basic process for non-linear FEM simulation was expatiated using the software ANSYS,and then the FEM model was validated by experimental data.Based on which the structural behavior was evaluated from four aspects: strength,stiffness,load distribution,ductility and energy dissipation.The analytical results indicate that the structure has ample lateral bearing capacity and high safety factor.The structure has good performances on ductility and energy dissipation.The steel framework undertakes 80% ～ 100% of the whole overturning moment and the infill wall takes 80% ～ 90% of overall lateral load.Finally,suggestions on aseismic design were presented.