新型复合剪力墙轴心受压试验研究

Experimental Investigation on a New Type of Composite Shear Wall Under Axial Compression

在国内外研究成果基础上,提出一种新型复合剪力墙结构,通过5个1/2比例缩尺剪力墙试件轴心受压试验,对比分析其破坏形态和受力机理,研究复合剪力墙结构夹于两侧钢筋混凝土结构层之间的保温层对复合剪力墙轴压性能的影响。试验结果表明:复合剪力墙结构在斜拉筋拉结作用下,两侧结构层呈现出很好的协同工作能力;在轴向压力作用下,试件未出现分离鼓出现象,能够较好抵抗轴压作用。无保温层的复合剪力墙结构得益于钢筋网架的套箍作用,承重效果极佳。最后提出相应受压承载力计算公式并与实测值进行对比验证。

Based on the research results at home and abroad,a new type of composite shear wall structure is proposed.The influence of the insulation layer sandwiched between the reinforced concrete structural layers on both sides on the axial compression performance of the composite shear wall is studied by comparing and analyzing the failure form and force mechanism through the axial compression tests of five 1/2-scale model specimens of composite shear wall.The experimental results show that the two layers of the composite shear wall structure have good cooperative working ability under the action of the cable-stayed reinforcement.Under the action of axial pressure,the specimen does not appear any separation and bulge phenomenon,and can better resist the axial pressure.The composite shear wall structure without insulation has excellent load-bearing effect thanks to the hoop action of the steel grid frame.Finally,the corresponding formula for calculating the compressive bearing capacity is proposed and compared with the measured values for verification.