不同配筋形式混凝土剪力墙受剪性能试验研究

通过13片高宽比为1.5、轴压比为0.5的不同形式混凝土墙抗震性能试验研究,对比了不同形式剪力墙受剪破坏形态、极限承载力及延性性能。试验表明:截面两端设置型钢、钢管或核芯柱的混凝土墙及墙内设置型钢或钢筋暗斜撑的混凝土墙,可不同程度地提高剪力墙受剪承载力及延性;增加墙体分布筋配筋率也可提高剪力墙受剪承载力,但配筋率过高时,其延性很差。提出了两端设置型钢及墙内设置暗斜撑的混凝土剪力墙受剪承载力设计计算公式,计算结果与试验比较吻合。还提出了剪力墙受剪截面控制条件的建议公式。

Experimental study on shear behavior of concrete wall with different types of reinforcement

By quasi-static test of 13 wall specimens,the shear properties are studied for the shear failure mode,bearing capacity and hysteretic behavior of different types of shear walls.The height to width ratio for the specimens is 1.5,and the axial compression ratio is 0.5.The test results show that embedded steel shapes or core columns at two ends and the concealed bracing in shear wall can improve the bearing capacity and ductility of shear wall.Increasing of reinforcement can also increase the bearing capacity,but ultra high reinforcement may cause poor ductility.The recommended formula is quite consistent with experimental data.The shear force limitation for concrete wall section is also suggested.