密肋复合墙体压弯剪复合受力性能试验研究

Experimental study on behavior under co-action of press,bending and shear of multi-ribbed composite wall

以两榀1/2比例的两层密肋复合墙体作为研究对象,按照与12层墙体底部受力相等的原则设计加载模式,对密肋复合墙体在水平和竖向荷载及水平弯矩作用下的压弯剪复合受力性能进行了静载试验研究。了解了密肋复合墙体的破坏过程,分析了墙体的破坏模式及其特征、承载力、变形性能、延性及截面正应变分布等受力性能。试验结果表明:密肋复合墙体在压弯剪复合受力状态下的破坏模式主要为以边框柱拉压破坏为特征的弯曲型破坏;在压弯破坏极限状态时,墙体截面正应变主要集中在边框柱截面内,墙板的整体抗弯作用较小。试验研究结果可为研究密肋复合墙体压弯剪复合受力性能有限元分析模型、建立密肋复合墙体正截面承载力计算理论及设计方法提供依据。

Using two 1/2-scaled two storeys multi-ribbed composite walls as specimens, designing loading mode according to the principle that force is equal to bottom of 12-storey wall, the behaviors about co-action on press, bending and shear of the walls under vertical, horizontal load and moment were tested under static loading. Experimental studies were carried out to investigate failure process and patterns, bearing capacity, deformation performance, ductility and normal strain distribution of the walls. The results indicate that failure patterns of the walls are mainly bending-type with the feature of tension and press failure of end-columns, and normal strain of the cross is mostly concentrated on end-column, but bending resistance of the slab is little, under press-bending ultimate state. The results can provide reference for the study of finite element model of the behaviors under co-action of press, bending and shear, and help to establish the design method of the normal section bearing capacity of the walls.