Double Vertical Web Member Vierendeel Truss Rhs Tt Node By The Power Of Performance Analysis And Research

Square hollow steel section have the advantages of beauty,lightness and lower usage of steel amount. As structural compents,square hollow steel sections have favourable properties for resisting compression,bending and torsion. The structures made of square hollow steel section by using the directly welded joints without any reinforcement are fabricated easily and economically,so which have gota wild application in China now. The key problem in the designing of this structure is the static behavior of the directly welded joints. Because the stress distribution around the joint is complicated,little information was available. In China,the reaserch about the directly welded joints has been developed for a short time,and mature designing specification can be observed,which leads to restrict its applications to extent.An inelastic nonlinear finite element analysis of uniplanar TT-joint made of square hollow steel section has been completed with the finite element program named ANSYS in this paper. The full loading - displacement path had been traced,and the ultimate strength of the TT-joints has been determined. Based on a series of numerical analysis of unipanar TT-joints of various geometric parameters,the effect of the various geometric on ultimated strength has been investigated. The method of the reinfore joints had been offered. In order to make the analysis results more precise ,a lot of factors including grid dimension ,boundary , condition and material properties were considered in the analysis.