型钢混凝土边框组合剪力墙抗震性能有限元分析

Numerical Simulation of Seismic Performance of Steel Reinforced Concrete Shear Walls

利用有限元软件Open SEES建立型钢混凝土边框内藏钢板组合剪力墙模型,研究了边框柱型钢、塑性铰区墙肢嵌入钢板以及过渡层的设置对剪力墙的耗能、骨架曲线、层间位移以及有害层间位移角等抗震性能的影响.分析结果表明,型钢柱的加入在增加耗能、减小层间位移及有害层间位移角等方面的作用显著;增加墙身钢板能减小后期的层间位移及有害层间位移角,但仅在底部加强部位设置钢板则会导致刚度突变,从而影响组合剪力墙的抗震性能,建议同时设置过渡层.

A model of reinforced concrete shear wall embedded with steel plate was established with FEM software OpenSEES to study how its seismic performance in hysteric curves（ energy consumption）, skeleton curves, story drift, and destructive story drift was influenced by frame steel, steel plated plastic hinge and transition layer. The result shows that inclusion of steel bars significantly improves the energy consumption, reduces the story drift and destructive story drift. Increased steel plate can reduce the story drift and the destructive story drift, but steel plated wall bottom alone may cause stiffness mutation and in turn harm the seismic performance, and so it is suggested that a transition layer be set up as well.