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为了研究型钢高强混凝土短肢剪力墙节点的抗裂能力,以配钢形式、轴压比和梁结构类型为变化参数设计了4个型钢高强混凝土短肢剪力墙节点试件和1个高强混凝土短肢剪力墙节点试件进行低周反复荷载试验,观察试件的受力破坏全过程,并获取其开裂荷载。结果表明:节点破坏先后经历初裂、通裂、极限和破坏4个阶段,开裂荷载约为极限荷载的30%～40%,配钢形式对节点抗裂承载力的影响较明显,增大轴压比对节点抗裂承载力有所提高。在试验基础上提出节点抗裂承载力计算公式,计算值与试验值吻合较好。
In order to study the crack resistance of high-strength concrete short-leg shear wall joints, four steel-reinforced concrete short-leg shear wall joints specimens were designed by changing steel form, axial compression ratio and beam structure type, Concrete short-limbed shear wall joint specimens were subjected to low-cycle repeated loading test to observe the whole process of the specimen under stress and damage, and to obtain its cracking load. The results show that the failure of the joint has experienced four stages of primary cracking, cracking, limiting and destroying successively. The cracking load is about 30% ~ 40% of the ultimate load. The steel form has obvious influence on the cracking resistance of the joint, Pressure ratio of the node crack resistance has increased. Based on the test, the calculation formula of joint cracking resistance is proposed. The calculated value is in good agreement with the experimental value.