Experimental study on the lateral resistance of prefabricated sandwich shear walls with low axial compression ratio
Prefabricated sandwich shear walls represent a quintessential application of integrated structural insulation technology,offering significant potential for adoption in extremely cold regions and near-zero energy buildings.This study introduces a metal insulation connector designed for tensioning between the inner and outer wall of sandwich walls.Based on this,one cast-in-place sandwich shear wall specimen and three prefabricated specimens were designed and produced.Monotonic horizontal loading and unilateral shear tests were conducted to investigate the effects of the bottom connection method,insulation layer thickness,and connector type on the lateral resistance of prefabricated sandwich shear walls at an axial compression ratio of 0.1.Additionally,the working mechanism and failure modes of the connectors were analyzed.The results indicate that sandwich shear walls using grouted sleeve connections for the bottom joint have lateral load-bearing capacities similar to cast-in-place specimens,achieving"equivalent to cast-in-place"performance.The thickness of the insulation layer and the type of connector slightly affect the stiffness contribution of the outer wall to the inner wall,thereby influencing the wall's load-bearing capacity,which is primarily provided by the inner wall.Under low axial compression ratios,prefabricated sandwich shear walls exhibit good ductility,demonstrating predominantly bending failure modes.Compared to FRP connectors,metal insulation connectors possess superior load-bearing and deformation capacities,making them suitable for connecting the inner wall and outer wall of prefabricated sandwich shear walls.
万方数据
维普
