斜筋配置对单排配筋低矮墙抗震性能影响试验

在低配筋量的单排配筋混凝土低矮剪力墙中配置斜向钢筋,可限制基底施工缝处水平剪切滑移和墙体斜裂缝开展,提高混凝土低矮剪力墙的抗震耗能能力.为探求带斜筋单排配筋混凝土低矮剪力墙的优化配筋设计方法,进行了5个不同配筋设计的剪力墙模型低周反复荷载试验,对比分析了各模型的破坏特征、滞回性能、承载与变形能力、刚度退化规律、耗能能力及钢筋应变发展规律.试验结果表明:对于单排配筋混凝土低矮剪力墙,斜筋可有效控制其剪切变形,使其抗震性能优于不带斜筋的剪力墙;合理配置斜筋,可明显提高混凝土低矮剪力墙的抗震耗能能力,获得性价比较高的抗震墙.

Experimental study on the influence of different inclined reinforcements collocation on seismic performance of low-rise concrete shear wall with single row of steel bars

The inclined reinforcements are configured in low-rise reinforced concrete shear wall with single row of steel bars and low reinforcement ratio, which can limit horizontal shear slip at the bottom construction joints and development of diagonal cracks on the wall. To investigate optimization design method of reinforcements for low-rise concrete shear wall with single row of steel bars and inclined reinforcements, the cyclic loading tests of 5 shear walls with different reinforcement design were carried out. The failure characteristic, hysteretic property, load-carrying and deformation capacity, stiffness degradation, energy dissipation and reinforcement strain were compared and analyzed. The results show that the seismic performance of shear wall with inclined reinforcements is better than the wall without inclined reinforcements, because the inclined reinforcements can control the shear deformation effectively. If inclined reinforcements are reasonably allocated, energy dissipation capacity of low-rise concrete shear wall can be significantly improved and higher performance price ratio of structural wall can be obtained.