型钢支撑混凝土剪力墙抗震性能试验研究

Experimental study on seismic behavior of concrete shear walls with steel support

为研究型钢类型对型钢支撑混凝土剪力墙抗震性能的影响,进行了3个1/3缩尺的型钢支撑混凝土剪力墙和1个普通钢筋混凝土剪力墙对比试件低周反复荷载下的试验研究。得到了其破坏过程和破坏模式,并且分析了不同型钢类型对剪力墙承载能力、裂缝开展、刚度、延性及耗能的影响。试验结果表明:支撑对剪力墙的承载能力、刚度、延性及耗能性能均有较大提升作用。X形槽钢、X形角钢和X形工字钢支撑剪力墙的承载力分别比对比试件提高了71.8%、59.6%和49.4%,其延性系数分别提高了38.3%、5.3%和14.5%;型钢支撑混凝土剪力墙的刚度退化速率更加缓慢,而且中后期刚度明显优于对比试件;型钢支撑混凝土剪力墙的塑性区范围较对比试件大幅增加,试验得到的滞回环也更加饱满。

In order to study the influence of steel type on seismic performance of steel reinforced concrete shear wall,low cyclic loading experiments have been carried out,including experiments on the three 1/3 scaled of steel reinforced concrete shear walls and a contrast experiment on a normal reinforced concrete shear wall. According to the failure process and failure mode,the bearing capacity,crack propagation,stiffness,ductility and energy dissipation of shear wall were influenced by different types of steel. The experimental results show that the brace has a great effect on the bearing capacity,stiffness,ductility and energy dissipation capacity of the shear wall. Using X shaped U-steel,X shaped angle steel and X shaped I-steel as a brace respectively,the ultimate bearing capacity of shear wall can be increased by 71. 8%,59. 6% and 49. 4%,the ductility coefficient by 38. 3%,5. 3% and 14. 5% than contrast specimen; The stiffness of the steel reinforced concrete shear wall with brace is obviously better than that of the contrast specimen in the middle and later stages of experiment and the stiffness degradation rate is much slower; The plastic range of the steel reinforced concrete shear wall with brace increases dramatically than contrast specimens,and the hysteresis loop is full.