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试验共设计了4个试件,其中1个为对比试件,另外3个为在梁端塑性铰区钢筋骨架外侧绑扎不同层数和不同网格间距的镀锌焊接钢丝网的加强试件。通过低周反复加载试验,研究在低周反复荷载作用下镀锌焊接钢丝网加强试件与对比试件的受力特性、破坏特征、滞回曲线、延性和刚度退化等抗震性能的变化。试验结果表明,梁端绑扎镀锌焊接钢丝网能够有效改善和延缓混凝土保护层的脱落,试件的延性、刚度退化程度明显好于梁端未绑扎镀锌焊接钢丝网的试件。
A total of four specimens were designed and tested, one of which was a comparative specimen. The other three specimens were galvanized welded wire mesh with different number of layers and different grid spacing on the outer side of the plastic hinge zone of the beam end reinforcement. Through the low-cycle repeated loading test, the change of anti-seismic performance such as stress characteristics, failure characteristics, hysteresis curve, ductility and stiffness degradation of galvanized welded steel wire reinforced specimens and comparative specimens under low cyclic loading was studied. The test results show that the galvanized welded steel mesh with beam ends can effectively improve and delay the shedding of concrete protective layer. The ductility and stiffness degradation of the specimens are obviously better than those of specimens with unbonded galvanized welded wire mesh at the beam ends.