To improve the research on the hysteretic performance of H-shaped steel beams under pure bending loads,a pseudo static test under multi cycle hysteretic loading system was added to the H-shaped steel beams of class 2 section.The target energy consumption under this loading system is equal to the total energy consumption of the specimen at the peak load under the constant amplitude loading system.Therefore,the failure mode,cumulative damage and energy consumption laws of the specimen were analyzed,and the threshold value that does not affect hysteretic energy consumption in the original idea is verified to be lower than 0.02 rad.At the same time,the finite ele-ment comparative analysis was conducted to refine the existing models in this test.The variation process of welding residual stress of the specimen was simulated using thermoplastic method in finite element analysis,thereby the effect of residual stress was introduced to the model loading process,which significantly improves the initial stiffness of the specimen,the time of local buckling of the flange and the stiffness degradation after ultimate load.
关键词
局部屈曲/纯弯曲/H形钢梁/滞回/有限元
Key words
local buckling/pure bending/H-shaped steel beam/hysteresis/finite element
维普
万方数据