T型剪力墙骨架曲线计算方法及试验验证

摘要

为研究T型剪力墙在腹板受压时的力－位移骨架曲线，提出将截面弯矩－曲率骨架曲线及构件的力－位移骨架曲线均简化为以开裂点、屈服点、峰值点和极限点为特征点的四折线模型；然后基于平截面假定和传统的弯曲理论，考虑边缘约束构件对峰值点、极限点的影响，建立压弯荷载作用下T型剪力墙截面弯矩－曲率关系的四个特征点值的计算公式，并据此推导出T型剪力墙构件的力与位移骨架曲线的四个特征点的计算公式。为验证公式的合理性，结合T型剪力墙拟静力试验，将试验结果与计算结果进行比较。研究结果表明：T型剪力墙构件的力与位移的四折线型骨架曲线与试验得到的骨架曲线基本一致，可为基于性能的T型剪力墙抗震分析与设计提供参考。%In order to study skeleton curve of T-shaped shear wall of which the web was in compression,moment-curvature skeleton curve of cross section and force-displacement skeleton curve of shear wall component were both simplified as four lines,which were represented by four featuring points:cracking point,yield point,peak point and ultimate point.Based on the flexure theory and plane cross section assumptions,considering the influ-ence of constraints on the values of peak point and ultimate point,a calculating theory to calculate the value of the four featuring points of moment-curvature skeleton curve of cross section was established,and then the for-mulation for the four featuring points of force-displacement skeleton curve of shear wall was put forward.In order to validate the accuracy of the theory,some experimental results were used to compare with the theoretical values.The research shows that the theoretical values are almost agreed with the experimental results.These con-clusions can provide references for performance-based seismic design of T-shaped shear wall.