Study On Hysteresis Performance Of ALC Wallboard Embedded In Steel Structure Residence

The frame structure system with embedded infill walls is one of the most common types of housing construction systems.Autoclaved Aerated Lightweight Concrete(ALC)panels are listed as "recommended products for national residential construction" because of their light weight,high industrialization,fast construction speed and beautiful appearance.In the steel structure house,ALC wallboard can play its superiority as the infill envelope structure,which is in line with the sustainable development policy and meets the requirement of building energy saving.However,as a brittle panel,ALC wall panels are prone to cracking under reciprocal loading,leading to the degradation of the overall structural hysteresis performance.To study the hysteresis performance of steel frames with embedded ALC wallboard,the following work was accomplished in this paper by applying cyclic loads to hinged steel frames with embedded ALC wallboard using both experimental and finite element analysis methods.(1)The test specimens were designed with 1-bay U-shape card connection and 3-bay tube card connection for the hysteresis performance test,and the load-displacement hysteresis curve,skeleton curve,strength,stiffness degradation and energy dissipation were compared.The test results show that the overall strength,stiffness and energy dissipation capacity of the wall panel under the tube card connection are better than the U-shaped card connection.The hysteresis curve "pinching and shrinking" effect is obvious after the opening of the doorway;the opening of the doorway has weakened the hysteresis performance such as the bearing capacity,stiffness and energy dissipation capacity of the whole specimen.At the same time,the hysteresis performance of the hinged steel frame of the embedded ALC wallboard arranged against the edge of the doorway is better than that of the centered doorway,and the location of the doorway needs to be reasonably arranged under the condition of necessary opening.(2)ABAQUS finite element software was used to establish the finite element analysis model of the embedded ALC wallboard articulated steel frame connected by the tube clamp method,and the results of the test and finite element analysis were compared,including the hysteresis curve,skeleton curve,stiffness degradation curve and single turn energy dissipation curve of the specimen,and the errors of the initial stiffness,ultimate strength and total energy dissipation capacity were 8.90%,2.67% and 0.60%,respectively,and the finite element The calculated results are basically consistent with the experimental results.(3)Based on the reliable results of the FEM method,a parametric analysis of the embedded ALC wallboard was conducted to investigate the effects of five groups of parameters,including ALC panel strength grade,ALC panel thickness,inter-panel friction coefficient,number of joints and reinforcement rate of the built-in reinforcement mesh,to compare the hysteresis curve,skeleton curve,stiffness curve and hysteresis loop single-turn energy dissipation curve of each model,and finally to draw conclusions related to the improvement of the hysteresis performance of the embedded ALC wallboard.