带翼缘钢筋混凝土剪力墙抗震性能试验研究

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。

Experimental research on seismic behavior of reinforced concrete shear walls with flange

Quasi-static tests of five reinforced concrete shear walls with flange were carried out under cyclic loading. Considering different section forms, loading histories, range and stirrup ratio of boundary element at the free end of web and whether to add boundary element at the web-flange junction, failure mechanism, hysteretic behavior, bearing capacity and deformation capacity were investigated under uniaxial and biaxial loads. The results indicate that the damage to the shear walls with flange is mainly concentrated in the boundary element of the free end of web, while the flange remains intact expect for a few cracks. Hence setting boundary element at the web-flange junction has little effect on the mechanical behavior of the shear walls. The strength and stiffness are higher when the flange is in tension, whereas the ductility and energy dissipation capacity are better and the stiffness degradation is slower when the flange is in compression. The influence of the biaxial load on the bearing capacity and deformation capacity in the web direction is minor. Enhancing the boundary restraints of the web boundary can effectively improve the seismic behavior of the shear walls.