高轴压比钢-混凝土组合剪力墙压弯性能试验研究

Experimental study of the compression-bending behavior of composite shear walls of high axial compression ratios

通过对13片不同形式的高轴压比、大剪跨比剪力墙进行往复水平力加载试验,研究墙体两端暗柱设置型钢、墙身增设内藏钢板等形式组合剪力墙的压弯承载力、延性性能及破坏机理。试验结果表明:基本试件、两端暗柱设置型钢试件、内藏钢板试件的破坏过程相近,两端暗柱设置型钢试件和内藏钢板试件裂缝条数较多、宽度较小,内藏钢板试件的破坏情况相对较轻;两端暗柱设置型钢、增设内藏钢板,对压弯承载力、变形能力提高显著;组合剪力墙轴压比计算可以计入两端型钢和内藏钢板的作用。根据试验结果,提出钢板组合剪力墙压弯承载力计算的建议公式。

The press-bending behavior of 13 shear wall specimens with high axial compression ratios（0.285～0.4） and high aspect ratio（2.7） were studied by testing under low-frequency cyclic lateral loading.The specimens included reinforced concrete（RC） walls,steel reinforced concrete（SRC） walls,and steel plate-concrete composite（SPRC） walls.The RC walls,SRC walls,and SPRC walls exhibit similar damage patterns.Cracks of the SRC walls and SPRC walls were narrower,and damages of the SPRC walls were less severe.The embedded steel plate or profiled steel in core columns effectively improved the bearing capacity and ultimate drift ratio.Based on the test results,a strength formula and the concept of real axial compression ratio for SPRC walls were proposed.