Abstract

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Title:: Experiment on Seismic Performance of Non-template Insulation Shear Wall Under Varied Axial Compression Ratios

Author(s):: WU Fang-bo; QIU Wei-cheng; OUYANG Jing; LI Jun; ZHOU Xu-hong; College of Civil Engineering, Hunan University

Keywords:: non-template insulation shear wall; seismic performance; axial compression ratio; failure mechanism; cooperative performance

Abstract:: In order to study the effect of varied axial compression ratios on the seismic performance and the cooperative performance of the non-template insulation shear wall, pseudo-static tests were carried out on 3 pieces of insulation shear wall with axial compression ratios of 0, 0.1 and 0.2. The development and distribution of cracks in the prefabricated concrete template on both sides of the wall were observed and recorded, and the test data such as displacement ductility coefficients, hysteresis curves and skeleton curves of the specimens were obtained. Based on the analysis of the curves and destruction modes, the failure mechanism of the non-template insulation shear wall under low cyclic loading was obtained. The results show that the failure process can be divided into three phases: uncracked, with cracks in the work and fail. The cracks in all 3 specimens develop and distribute uniformly during tests, which shows good cooperative performance, and the concrete of corner all crush substantially when the wall is broken. With the increase of the axial compression ratio, the cracking load of prefabricated concrete template increases gradually, and the position of the horizontal crack is gradually shifted downwards, the ultimate bearing capacity and stiffness increase while the ductility decreases. The study provides necessary scientific basis for further investigation on the failure mode and seismic performance of non-template insulation shear wall.