双钢板混凝土剪力墙基于性能的变形指标限值研究

Study on the limit value of deformation index of double steel plate concrete shear wall based on seismic performance

为更好地评估双钢板混凝土(SCS)剪力墙的变形性能,文中提出了SCS剪力墙的破坏形态划分准则,并以构件的各材料应变极限值为标准来判别构件的性能状态,提出了SCS剪力墙性能状态划分标准。并依照现行规范设计432个SCS剪力墙进行有限元分析,以轴压比、剪跨比、暗柱配钢率、墙身配钢率和暗柱配筋率为控制参数,研究其对构件各性能状态位移角限值的影响,得到SCS剪力墙各性能状态的位移角限值。研究结果表明:发生剪切、弯曲、弯剪破坏的构件,剪跨比、轴压比对其位移角限值影响较大;发生剪切破坏的构件,墙身配钢率对其位移角限值的影响较大;发生弯剪或弯曲破坏的构件,暗柱配钢率对其位移角限值的影响较大。对数值计算结果进行回归分析,拟合得到SCS剪力墙各性能状态的位移角限值计算公式,为SCS剪力墙基于性能的抗震设计与性能评估提供参考。

In order to better evaluate the deformation performance of double steel plate concrete(SCS)shear wall,the failure mode division criterion of SCS shear wall is proposed.The performance state of the component is judged by the material strain limit value of the component.The performance state division standard of SCS shear wall is proposed.432 SCS shear walls are designed according to the current code for finite element analysis,and the axial compression ratio,shear span ratio,steel ratio of concealed column,steel ratio of wall body and reinforcement ratio of concealed column are taken as the control parameters.Its influence on the displacement angle limit of each performance state of the member is studied,and the displacement angle limits of SCS shear wall in each performance state are obtained.The results show that:the shear span ratio and axial compression ratio have a great influence on the limit value of displacement angle of members with shear,bending and bending shear failure.For shear failure members,the steel ratio of wall body has a great influence on the limit value of displacement angle.For the members with bending shear or bending failure,the steel ratio of concealed column has a great influence on the limit value of displacement angle.Through regression analysis of the numerical calculation results,the calculation formula of displacement angle limit of SCS shear wall in each performance state is fitted,which provides a reference for performance-based seismic design and performance evaluation of SCS shear wall.