Finite Element Analysis Of Axial Compression Capacity Of Steel Hat Piece Column Wrapped With Foam Concrete

In recent decades, light-gauge steel system has become common practice in theuse of residential structures. There are many advantages in this structure such as light,fast construction, good seismic performance, green and environmental protection. Allof these advantages are extremely consistent with today’s architectural concept ofgreen, low-carbon and energy saving, so it has a bright prospect for development inthe field of architecture. However, due to small section and thin wall of the traditionallight-gauge steel system, the bearing capacity of the whole structure is usually low,and some of the members are easily instability and damaged, these all limit thefurther development of light-gauge steel system.To deal with these shortcomings of light-gauge steel system above, a new typeof structure: light steel-lightweight concrete composite structure was introduced inthis paper, and a model of a commonly used member of this system–steel hat piececolumn wrapped with foam concrete was also established by finite element softwareABAQUS to compare and analyze the difference of bearing capacity, damage modaland deformation of steel hat piece column before and after wrapped with foamconcrete and also discuss on the reasons of the difference in depth.Based on the previous studies, the Concrete Plastic Damage models of differentstrength grades of foamed concrete were put forward and verified by finite elementsoftware in this paper. At the same time, the control variable method was used to ana-lyze the influence of strength grades of foamed concrete and thickness of hat piece onaxial force performance of steel hat piece column wrapped with foam concrete.Obtain and compare the failure mode, ultimate bearing capacity and relationshipcurves of force-displacement of steel hat piece column before and after wrapped withfoam concrete. The final result shows that the introduction of foam concrete has asignificant help to increase the stability, axial compression capacity and stiffness ofsteel hat piece column.The results of this paper provide reference for research on steel hat piece wall,steel hat piece square column and other structural styles wrapped with foam concrete,and also provides the theoretical basis for further application of foam concrete inlight-gauge steel system.