Study on in-plane bending property of SHS X-joints

In order to investigate the static behavior of SHS(square hollow section) X-joints under in-plane bending, geometry model and non-linear finite element analysis were carried out using ABAQUS software. Combining with verifying experiment, the failure mode, deformation process and ultimate capacity of SHS Xjoints were investigated, the effect of joint action between axial force and bending mement on the ultimate bearing capacity was also discussed. The results showed that, under in-plane bending, tension side of chord protruded, compression side sunk, and the welds in tension side of brace failed. Node chord entered a plastic phrase and finally the sample failed due to large plastic deformation. The ultimate capacity increased remarkably as β value increasd. Under the joint action between axial force and bending mement, the ultimate bearing capacity decreased.