带斜筋单排配筋L形截面剪力墙低周反复荷载试验研究

The Cyclic Loading Tests on L-shaped Shear Wall with Single Row of Steel Bars and Inclined Reinforcements

将多层住宅剪力墙中的一部分钢筋布置成斜向钢筋,可改善单排配筋剪力墙的结构性能,增强其抗剪切性能,提高其抗震能力。为研究此种配筋方式的L形截面剪力墙抗震性能,分别对单排配筋混凝土L形截面剪力墙模型和带斜筋的单排配筋混凝土L形截面剪力墙模型进行低周反复荷载试验,对比分析两者的承载力、延性、刚度、滞回特性、耗能能力及破坏特征,研究斜筋对改善单排配筋L形截面剪力墙抗震性能的效果。结果表明,合理布置斜筋可以显著提高单排配筋L形截面混凝土剪力墙的承载力、延性和耗能能力,使其能更好地满足多层住宅结构的抗震要求。

In order to improve the seismic performance of shear walls of multi-story residential structures with single row of steel bars,part of the steel bars in the shear walls can be arranged in form of inclined reinforcement.The inclined reinforcements can improve the shear behavior of the shear wall,resulting in increasing the energy dissipation capacity of the shear wall.To know the effects of this reinforcement arrangement in L-shaped RC shear walls,two cyclic loading tests were conducted.The specimens included one L-shaped shear wall with single row of steel bars,and another with single row of steel bars and inclined reinforcements.The comparative analysis of load-bearing capacity,ductility,stiffness,hysteresis property,energy dissipation and failure mode between the two specimens was made.The results show that proper configuration of inclined reinforcements can significantly improve the load-bearing capacity,ductility and energy dissipation of L-shaped shear wall with single row steel bars,making it better to meet the requirements of seismic performance of multi-story residential structures.