开洞大小对短肢剪力墙抗震性能影响的试验研究

通过对1个未开洞的短肢剪力墙和2个开洞直径分别为120,160 mm的短肢剪力墙的低周反复荷载试验,研究洞口大小对短肢剪力墙抗震性能的影响。试验结果表明:随着洞口尺寸的增大,试件的开裂荷载、屈服荷载、极限荷载有所下降,但延性提高,滞回环更加饱满,耗能能力增强,试件越来越接近框架特性;试件的破坏形式均为弯曲破坏,破坏时,腹板端纵筋屈服,翼缘端纵筋偶有屈服,腹板端、翼缘端箍筋均未屈服,腹板端混凝土压碎。

Experimental Study on the Effect of Opening Size on the Seismic Performance of Short-Pier Shear Wall

Based on a low-cyclic loading experiments on three specimens of short-pier shear wall, one without opening and the other two with openings of 120 and 160 mm, analyzed the effects of the size of opening on the seismic performance of short-pier shear wall. The result indicates that the cracking load, yield load and ultimate load of specimens decrease with the opening size increasing, and its ductility improves, the hysteresis loop is fuller and the energy dissipation capacity enforces. In addition, as the size of opening increases, the specimens is more close to the frame characteristics, and the failure modes of the specimens are flexural failure. When the specimen fails, the web longitudinal reinforcement yields, the flange end longitudinal reinforcement sometimes yields , the web and flange end hoops do not yield, and the web concrete crushes.