Elastoplastic Bending Buckling of Q420 Eccentric Compression Members with Double-angle Combined Cross-section
YU Dengke,LI Zhengliang,YANG Longyu and YU zhou
DOI:10.3969/j.issn.1674-4764.2012.05.003
Received ,Revised , Accepted , Available online July 01, 2015
Volume ,2012,Pages 12-16
- Abstract
The experiments were carried out to investigate the behavior and failure modes of Q420 double-angle combined cross-section members whose specification were L160×12, L160×14, L160×16. The results show that all the members fail with an elastoplastic bending buckling. Based on the improvement of the inverse calculation segment length method and some relevant procedures, the related curves of axial force and moment with different specifications, different slenderness ratios and residual stresses were calculated. The calculation method of in-plane stability and column curves were proposed. The nonlinear power function model is appropriate for such members' moment-rotation relations under equal bending moments.