单排配筋剪力墙结构单元工作性能试验研究
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摘要
为研究双向单排配筋混凝土剪力墙和双向双排配筋混凝土剪力墙空间力学性能的差异,对1个1/2缩尺的双向单排配筋混凝土剪力墙结构单元模型进行了单向重复竖向荷载下的试验研究.模型的一侧墙体为双向双排钢筋,另一侧为双向单排配筋,对应楼板中心位置施加竖向荷载,通过传力装置向楼板均衡施加荷载.在试验的基础上,分析了试件的承载力、滞回特性、刚度、墙体平面外工作性能、破坏特征,并用屈服线分析法计算了模型的竖向承载能力.试验表明,即使在楼板严重破坏的情况下,由于剪力墙的腹板与翼缘的共同工作,楼板两侧墙体的滞回曲线和墙体平面外挠度都比较接近,两侧墙体与楼板的相互作用差异不大,两侧墙体平面外的工作性能相近.研究结果表明,经过合理设计的双向单排配筋剪力墙可以满足抗震要求.
To make comparative study on spatial mechanical properties of RC shear wall with single row of steel bars and that with double rows of steel bars,an experiment has been introduced in the article,in which low cyclic reversed unidirectional load has been applied to a model of 1/2 scale.In the model,bi-directional steel bars of double rows have been designed to one side while those of single row to another.What's more,a vertical load has been exerted in the center of the slab evenly with a set of force-transmitting structure.Based on the experiment,the load-carrying capacity,hysteretic behavior,stiffness,out-plane performance of the shear wall and failure phenomena have been discussed.Besides,vertical load-carrying capacity has been calculated with yield-line theory.It's shown that hysteretic behavior and out-plane deflection of both sides are much similar while the slab under a vertical load.And that still goes well when the slab seriously damaged under extreme load,as the result of the collaboration of the web and flange.That is to say that the binding force on the slab of both sides is almost the same,so does to the out-plane performance of the shear wall.Therefore,rational designed RC shear wall with single row of steel bars can satisfy seismic demand.
To make comparative study on spatial mechanical properties of RC shear wall with single row of steel bars and that with double rows of steel bars,an experiment has been introduced in the article,in which low cyclic reversed unidirectional load has been applied to a model of 1/2 scale.In the model,bi-directional steel bars of double rows have been designed to one side while those of single row to another.What's more,a vertical load has been exerted in the center of the slab evenly with a set of force-transmitting structure.Based on the experiment,the load-carrying capacity,hysteretic behavior,stiffness,out-plane performance of the shear wall and failure phenomena have been discussed.Besides,vertical load-carrying capacity has been calculated with yield-line theory.It's shown that hysteretic behavior and out-plane deflection of both sides are much similar while the slab under a vertical load.And that still goes well when the slab seriously damaged under extreme load,as the result of the collaboration of the web and flange.That is to say that the binding force on the slab of both sides is almost the same,so does to the out-plane performance of the shear wall.Therefore,rational designed RC shear wall with single row of steel bars can satisfy seismic demand.
引文
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