Experimental and numerical study on flexural behavior of lightweight concrete composite wallboard
In order to study the flexural behavior of lightweight concrete composite wallboard,a composite wallboard with unburned core-shell lightweight aggregate concrete as inner wythe was proposed,and the experimental research was conducted.The experimental results were verified through numerical simulation software,and the thickness of insulation layer,the spacing of truss bars,the side length of steel grid and the diameter of truss bars were selected for parametric analysis.The improved equivalent section moment of inertia method was used to compare and analyze the test and simulation results.The results show that the cracking load of composite wallboard is 10.18 kN·m,which is typical flexural failure and can meet the practical application.When the composite wallboard is designed with the cracking load,the thickness of insulation layer is used as the main control parameter.When the thickness is increased,it makes the neutral axis of section shift and the effective section height increase,so that the cracking load can be improved.When the composite wallboard is designed with ultimate load,the ultimate bearing capacity of the composite wallboard can be improved by increasing the thickness of insulation layer,the number of truss web bars,the diameter of truss bars and reducing the size of steel mesh.The cracking load calculated by the theoretical formula is in good agreement with the experimental and simulated values,and the relative error with the test value is 10.69％,and the maximum relative error with the simulated value is 9.26％.
万方数据
维普
