The Limit Bearing Capacity For Gap K-Joints Of Steel Lipped Channels Trusses

A finite element method for limit bearing capacity of gap K-Joints of steel gapped channels trusses, with materiel and geometrical nonlinearity, is presented. The model treats the K-Joints as a shell structure consisting of triangular plane stress elements and triangular plane bend elements. The whole course of bearing force in K-Joints of R.H.S. trusses is analysed, including: plastic distributed on the chord, deformation in K-Joints of R.H.S. trusses. On the basis of comparison of theoretical prediction with Ansys results, the effect of the second moment is presented through regression analysis. The basis of the calculation and design of gap K-Joints of R.H.S. trusses is provided.