装配式钢骨架-轻骨料复合墙板抗震性能试验研究OA

A new type of assembled steel skeleton-lightweight aggregate composite wall panel is developed.The ceramic perlite concrete is filled into the steel skeleton as thermal insulation material to form a new composite wall panel that integrates thermal insulation and load-bearing.In order to study the seismic performance of the wall panel,a low-cycle reversed loading test was carried out on three wall panel specimens and one steel skeleton specimen,and the effects of channel steel dimension,the number of reinforcing mesh layers and whether or not the steel skeleton was filled were analyzed on the failure mode,lateral bearing capacity,stiffness and energy dissipation capacity of the specimens under a certain axial compression ratio.The test results show that the wall panel has higher lateral bearing capacity,stiffness and energy dissipation capacity,and the lightweight aggregate concrete and steel skeleton exhibit good bonding performance.The failure of the wall panel specimen is manifested as surface layer spalling,wall panel cracking and yielding deformation of channel steel.The steel skeleton specimen shows the bending deformation of channel steel and the bending fracture of reinforcing mesh.The lateral bearing capacity,initial stiffness and energy dissipation capacity of the wall panel decrease with the reduction of the thickness of the channel steel and the width of the channel flange.The lateral peak bearing capacity,initial stiffness and energy dissipation performance of the specimens with two layers of reinforcing mesh are higher than those with one layer of reinforcing mesh.The lateral bearing capacity,stiffness and energy dissipation of the unfilled steel skeleton specimen are lower than those of the composite wall panel specimen.Based on the test results,a formula for calculating the shear strength of the assembled steel skeleton-lightweight aggregate composite wall panel is proposed.The calculation results are in good agreement with the test results.