Axial Compressive Test And Finite Element Analysis Of Lattice Steel Gauged Angle Wall-columns

In recent years, the development and research of light gauge steel system areincreasingly concerned, which is in accordance with the requirements of new era，forexample，energy conservation and environmental protection. However, with the lowlateral stiffness, high cost and second decoration inconveniently, the conventionallight gauge steel system’s popularization suffers obstruction in the practicalengineering. Lattice steel gauged angle-lightweight concrete composite structure isput forward, which is composed of angle steel keel and light concrete. Withadvantages of conventional light gauge steel system, the new composite structurecould solve the above mentioned problems.In order to compare with axial bearing capacity of lattice steel gaugedangle-lightweight concrete composite wall researched later, compressive test andfinite element analysis of lattice angle steel columns will be done. The columns areall3meters and conclude five kinds of thickness. Through the comparative analysis,the data about the bearing capacity, failure mode and deformation performance isobtained. Besides，the mechanical performance of angle steel keel wall frame will beanalyzed through the finite element method. The main contents of the article concludeas below:(1) The introduction and problems faced in the development about traditionallight gauge steel system, test research of thin-walled light steel members in domesticand abroad.(2) Introduction of lattice steel gauged angle-lightweight concretecomposite structure. Manufacture and characteristic of composite wall, lattice anglerigid frame and foamed concrete are mainly introduced.(3) Test method and resultsanalysis of angle steel wall columns. At begin, through the tensile experiment,material parameters are obtained, such as, yield strength, elasticity modulus,elongation and tensile strength. Then, results about ultimate bearing capacity, failuremode and deformation performance can be got according to axial compression test.(4) On the basis of considering initial imperfections, modeling method of angle steelwall columns is stated by software ABAQUS. Besides, angle keel rigid frame’s simplified method is illustrated behind.(5) Comparison to results of test and finiteelement analysis. Firstly, ultimate bearing capacity and failure mode obtained fromfinite element analysis are in accordance with test results. By the way, the failuremodes are mostly overall bending instability. Secondly, vertical bearing capacity ofrigid frame column is twice or three times more than ultimate bearing capacity ofsingle wall column. And rigid frame columns’ failure modes are much different fromwall columns’. The former is mainly local torsional deformation.(6) Conclusion ofpaper.The results of test and finite element analysis indicate that ultimate bearingcapacity of one single angle steel wall column is low. However, when used for wallframes, the columns’ vertical bearing capacity increase substantially, and deformdifficultly. The above research could provide certain reference values for laterresearch and development of lattice steel gauged angle-lightweight concretecomposite structure.