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对5个带翼缘钢筋混凝土剪力墙进行了拟静力试验,各片墙体的主要变化参数为截面形式、加载方式、腹板自由端边缘构件长度和配箍率,以及是否在腹板与翼缘交界处添加边缘构件,研究其在单轴及双轴荷载作用下的破坏机理,滞回性能,承载力和变形能力。结果表明:带翼缘混凝土剪力墙的破坏主要集中在腹板自由端边缘构件内,翼缘除有少许裂缝外保持完好,在腹板与翼缘交界处设置边缘构件对剪力墙受力性能影响不大;翼缘受拉方向的承载力更高,刚度更大,而翼缘受压方向的延性更好,刚度退化较慢,耗能能力更强;双轴加载对剪力墙腹板方向的承载力和变形能力影响不大;增强腹板自由端边缘约束可有效改善剪力墙的抗震性能。
Quasi-static tests were carried out on five reinforced concrete shear walls with flanges. The main parameters of each wall were the cross-section, the loading method, the length of the free end of the web and the stirrup ratio, The edge member was added to the boundary of the flange to study its failure mechanism, hysteretic behavior, bearing capacity and deformation capacity under uniaxial and biaxial loads. The results show that the failure of the shear wall with flanges is mainly concentrated in the free end edge of the web. The flanges remain intact except for a few cracks. The edge members on the interface between the webs and the flanges stress the shear walls The bearing capacity of the flange in the direction of tension is higher and the stiffness is greater, the ductility of the flange in the direction of compression is better, the rigidity is slower to degrade, and the energy dissipation capability is stronger; biaxial loading on the shear wall The bearing capacity and deformation capacity in the direction of the slab have little effect. The restraint of the free edge of the web can effectively improve the seismic performance of the shear wall.