外包钢板混凝土T形短肢剪力墙抗剪承载力分析

Shear-bearing Capacity Analysis on Concrete Filled Steel Plate of T-Shaped Short-Leg Shear Walls

为了研究外包钢板混凝土T形短肢剪力墙在水平往复荷载作用下的抗剪承载能力,设计了11个T形短肢剪力墙试件,应用ABAQUS有限元分析软件建立了分析模型,对试件施加竖向荷载和水平往复荷载,有限元分析时考虑了材料的非线性。分析了不同肢厚比、不同钢板厚度和不同轴压比等参数对试件抗剪承载力的影响,结果表明:提高钢板的厚度可有效的提高试件的承载能力和耗能能力;控制肢厚比在6左右可有效提高试件的极限荷载,继续增大之后影响不大;控制轴压比在0.3左右时可以有效提高试件极限荷载和延性,轴压比继续增大之后,试件的极限荷载和延性都在下降。根据以上对试件的分析结果,基于叠加法,提出了外包钢板混凝土T形短肢剪力墙试件的抗剪承载力计算公式,计算结果与模拟结果数据吻合较好,可为设计应用提供依据。

In order to study the shear-bearing capacity on concrete filled steel plate of T-shaped short-leg shear walls under double reciprocating load,11 T-shaped short-leg shear wall specimens are designed and analyzed by ABAQUS finite element analysis software.The model is modeled,and the vertical and horizontal reciprocating loads are applied to the specimen,and the nonlinearity of the material is taken into account in the finite element analysis. The influence of different parameters such as slenderness ratio,thickness of different steel plates and different axial compression ratio on shear capacity of specimen is analyzed. The results show that the thickness of the steel plate can improve the bearing capacity and energy dissipation capacity of the specimen effectively. The limit load of the specimen can effectively improve the ultimate load of the specimen at 6 or so. The ultimate load and ductility of the specimen can be effectively improved when the axial load ratio is increased and the ultimate load and ductility of the specimen are decreased.According to the above analysis results of the specimen,the calculation formula of the shear capacity on concrete filled steel plate of Tshaped short-leg shear wall specimen is fitted based on the superposition method. The calculated results are in good agreement with the simulated results,and provide references for design application basis.