Experimental Study on Seismic Behavior of Insulation Layer Through Composite Shear Wall

In order to study the seismic behavior of insulation layer through composite shear wall, quasi-static tests of four 1/2 scaled shear wall specimens were tested under low-cyclic reversed loading, including three composite wall specimens and one solid wall contrast specimen. The failure characteristics, hysteretic performance, bearing capacity, ductility, stiffness degradation and energy dissipation capacity of the specimens are compared and analyzed, and the calculation formula of the shear bearing capacity is given. The test results indicate that the failure modes of the composite shear wall and the solid wall are all bending-shear failure. Under the action of tie bars, both sides of the composite wall has better cooperative working performance, similar hysteretic performance, bearing capacity and stiffness degradation performance with solid wall, also its deformation and ductility performance were better than that of solid wall. The U-shaped reinforcement spacing is densified to delay the cracking of the composite wall, but it has little effect on the bearing capacity. With the increase of the thickness of the intermediate insulation layer, the bearing capacity of the composite wall decreases, but the deformation and energy dissipation capacity were not affected. The cracking load of composite wall appears earlier, so the measures to prevent wall cracking should be taken in practical engineering. © 2022, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.