栓钉连接双钢板-混凝土组合剪力墙抗剪性能数值分析

Numerical analysis of shear resistance of concrete filled double-steel-plate composite walls with shear stud connectors

双钢板-混凝土组合剪力墙结构是一种新型高层建筑抗侧力构件,具有良好的应用价值和发展前景。根据其他学者的试验结果,结合相关文献中连接件的剪切滑移公式,拟合得出抗剪栓钉的剪力-滑移关系,并通过有限元软件ANSYS建立了双钢板-混凝土组合剪力墙的有限元模型。以分析组合剪力墙的剪切性能为目的,采用相关假定简化模型并与已有试验结果对比,验证有限元模型的合理性。采用验证过的有限元模型进一步对双钢板-混凝土组合剪力墙的抗剪性能进行非线性分析,研究抗剪栓钉间距、钢板厚度、混凝土板厚度、混凝土强度等级及组合剪力墙跨高比等主要参数的影响。数值结果表明,钢板、混凝土板厚度以及混凝土强度对双钢板-混凝土组合剪力墙的抗剪承载力的影响最显著,而栓钉间距会影响组合剪力墙的受剪破坏模式。

The concrete filled double steel plate composite wall(CFDSPCW)with shear stud connectors is a new type of construction component for high-rise buildings that resist lateral force.In this paper,the inplane shear resistance of CFDSPCWs is studied with nonlinear finite element analysis using ANSYS.To this end,some assumptions were made to simplify the numerical model.Based on the experimental results and the formula of shear-slip of stud connectors in the literature,a constitutive relationship explaining the shear-slip of shear stud connectors is proposed using curve fitting.Then,the finite element model of the experimental CFDSPCW is established and validated through experimental results.Thereafter,the study presents the effects of key parameters including the space of stud connectors,the thickness of both the steel plate and concrete core,the concrete strength,and the span-depth ratio of walls on the shear resistance of CFDSPCWs.The results indicate that the thickness of both the steel plate and the concrete core,and the strength of concrete are the most critical factors affecting the shear resistance of CFDSPCWs,and the spacing of stud connectors affects the failure mode of CFDSPCWs.