可更换耗能角钢连接的数值模拟及承载力分析OA

A replaceable energy-dissipating angle steel connection was taken as the research object,and its mechanical properties and load-transfer mechanism were analyzed using the finite element software ABAQUS.The numerical model comprehensively considered geometric nonlinearity,material nonlinearity,and contact interaction.The accuracy and rationality of the model were validated through comparison with existing experimental data.On this basis,parametric analyses were conducted to investigate the effects of angle steel section geometric parameters,free deformation length,and beam depth on the load-transfer mechanism,deformation mode,and load-bearing capacity of the connection.The results demonstrate that the finite element model accurately simulates the hysteretic behavior and deformation characteristics of the connection.The mechanical performance of the connection is governed by the geometric parameter and free deformation length of the angle steel.When the free deformation length is small,the angle steels exhibit shear-dominated behavior.As the free deformation length increases,their performance transitions to a combined flexural-shear mode and ultimately to flexure-dominated behavior.Based on numerical simulations and parametric analyses,design curves for the shear capacity of angle steels under various parametric configurations were proposed,and moment-shear interaction curves for the connection under different parameter combinations were established.These findings provide critical theoretical support and engineering guidelines for the design and practical application of angle steel connections.