高延性混凝土单面加固构造柱约束砖砌体墙抗震性能试验研究

为研究高延性混凝土(HDC) 单面加固构造柱约束砖墙的抗震性能，对4片HDC加固砖墙和4片作为对比试件的未加固砖墙进行了低周反复荷载试验，分析了单面HDC面层加固构造柱约束砖墙的破坏形态、滞回性能及刚度退化等特性。试验结果表明：单面HDC面层可对墙体形成有效约束，显著提高墙体的承载力和侧向刚度，延缓墙体开裂和刚度退化；加固试件具有较高的残余承载力，破坏主要集中于HDC面层；构造柱约束砖墙的砌筑砂浆强度对HDC面层加固后的砖墙抗剪承载力的提高无显著影响。为给HDC单面加固构造柱约束砖墙的设计提供参考，基于试验结果，提出了受剪承载力计算式，公式的计算值接近且低于试验值。

Experimental studies on seismic behavior of confined masonry walls strengthened with single HDC layer

In order to investigate the seismic behavior of confined masonry walls strengthened with single high ductile concrete (HDC) layer, 4 confined masonry walls strengthened with single HDC layer and 4 confined masonry walls without being strengthened for comparison purpose were tested under the low-cycle repeated loading. The failure pattern, hysteretic characteristics and stiffness degradation of confined masonry walls strengthened with single HDC layer were studied. Test results show that the single HDC layer can provide effective constraint for the wall, significantly improve the lateral strength and the stiffness of the wall and delay the occurrence of cracks and degradation of stiffness; The strengthened specimens were characterized with high residual bearing capacities with damages mainly concentrated on the HDC layer; After being strengthened with single HDC layer, the contributions of the strength of the masonry mortar to the improvement of shear capacity of the confined masonry wall was not obvious. Based on test results, a formula of determining the shear capacity was proposed as  design reference for confined masonry walls strengthened with single HDC layer. The predicted shear capacity according to the formula was close to but lower than the measured value.