Mechanical Property Analysis Of Circular Steel Tubular X-Joints

Tubular X-joint are at the nodes,the competent straight,the two branch pipes are cut into the nodes which are in the shape of the intersecting lines and are directly welded with the supervisors,also called simple joints,unstiffened joints or Directly welded joints.One of the difficulties in the design of steel tube structure is the design of the joints,due to the complexity of the geometry and material properties,the stress concentration is serious,and the influence factors are various.At present,many of the circular steel tubular X-Joints research at home and abroad,this paper on the basis of previous studies on the mechanical properties of the circular steel tubular X-Joints,simulated three-dimensional finite element numerical analysis,the main research contents are as follows:(1)In the previous test,based on the research,using finite element analysis technology,Respectively established the circular steel tubular X-Joints under axial compression? out of plane bending? in-plane bending three-dimensional nonlinear finite element numerical analysis model,the calculated results are in good agreement with the experimental results,which verifies the correctness of the model.(2)Using the above model,three dimensional nonlinear finite element numerical simulation analysis is carried out for the axial compression,in-plane bending and out of plane bending of circular steel tubular X-Joints.Discuss the outside diameter ratio,Diameter thickness ratio,Wall thickness ratio,The main branch angle and other factors,the influence of axial compression,in-plane bending and out of plane bending on the performance of circular steel tubular X-Joints.According to the analysis results,the design and construction process is put forward.