自复位钢框架-半圆形波纹钢板剪力墙滞回性能研究

为改善自复位钢板剪力墙结构中由钢板墙对框架柱的附加弯矩造成的框架柱截面尺寸增大及平钢板剪力墙过早屈曲导致的承载力下降的情况，提出一种采用侧边加劲半圆形波纹钢板剪力墙的自复位钢框架-半圆形波纹钢板剪力墙，通过对其各组成部分的力学特性进行分析得到自复位钢框架-半圆形波纹钢板剪力墙的恢复力模型及影响其可恢复性的关键点和参数。采用通用有限元软件ABAQUS建立了单层单跨自复位钢框架-半圆形波纹钢板剪力墙的分析模型，通过参数分析研究了自复位钢框架及半圆形波纹钢板剪力墙设计参数对自复位钢框架 半圆形波纹钢板剪力墙滞回性能的影响。结果表明：随着自复位钢框架的第二与第一刚度比及预应力钢绞线的初始张拉力的增大，自复位钢框架-半圆形波纹钢板剪力墙的复位性能增强，但当层间位移角大于1.5%时，耗能性能随着自复位钢框架的第二与第一刚度比及初始张拉力的增大反而降低；随着波纹钢板剪力墙的弹性初始刚度与自复位钢框架第一刚度比及侧边加劲半圆形波纹钢板剪力墙圆弧直径的增大，自复位钢框架-半圆形波纹钢板剪力墙的复位性能降低，当层间位移角大于1%时，耗能能力随着波纹钢板剪力墙的弹性初始刚度与自复位钢框架第一刚度比及圆弧直径的增大而提高。

Hysteretic performance of self-centering steel frame with semicircular corrugated steel plate shear wall with edge stiffeners

The additional bending moment of steel plate wall to frame column will decrease the bearing capacity of self-centering steel plate shear wall, which may lead to the increasing of section size of frame column and the premature buckling of steel plate shear wall. To resolve this problem, a novel self-centering steel frame with semicircular corrugated steel plate shear wall (SC-CSPSW) structure adopting semicircular corrugated steel plate shear wall with edge stiffeners (CSPSW) was proposed.The restoring force model of SC-CSPSW and the key points to determine the recoverability of SC-CSPSW were obtained by analyzing the mechanical characteristics of its components. The finite element model of SC-CSPSW which was a single-story single-span structure was established by ABAQUS. The influence of design parameters of self-centering steel frame (SC) and CSPSW on hysteretic performance of SC-CSPSW was studied through parametric analysis. The research results show that with the increase of the second and first stiffness ratio(α) of SC and the initial tension(T0) of the prestressed steel strand, the self-centering performance of SC-CSPSW increases and the energy dissipation performance decreases with the increase of α and T₀ when the inter-story displacement angle is larger than 1.5%. With the increase of the ratio(β) of the initial elastic stiffness of the CSPSW to the first stiffness of the SC and the diameter(R) of circular arc of the semi-circular corrugated steel plate shear wall with edge stiffeners, the self-centering performance of SC-CSPSW decreases, and the energy dissipation performance increases with the increase of β and R when the inter-story displacement angle is larger than 1%.