钢箱-混凝土组合梁滑移有限元分析

Finite Element Analysis on Slip of Steel Box-Concrete Composite Beams

以栓钉作为抗剪连接件的钢箱-混凝土组合梁在受弯破坏过程中会发生界面滑移,对其力学性能产生影响。本文使用有限元软件ABAQUS对四根剪力连接度不同的钢箱-混凝土组合梁进行数值模拟来探究组合梁的受力特性及滑移分布规律。结果表明,组合梁的极限承载力随剪力连接度的减小而减小,滑移量随剪力连接度的减小而增大;滑移随荷载的增加逐渐增大,跨中基本无滑移发生,距跨中的距离越远滑移量越大。

Steel box-concrete composite beams with stud as shear connectors are subject to interfacial slippage during flexural damage,which affects their mechanical properties.In this paper,four steel box-concrete composite beams with different shear connections are numerically simulated using the finite element software ABAQUS to investigate the force characteristics and slip distribution law of the composite beams.The results show that the ultimate bearing capacity of the combined beam decreases with the decrease of the shear connection degree,and the slip increases with the decrease of the shear connection degree.The slip increases gradually with the increase of the load,and basically no slip occurs in the middle of the span,and the further the distance from the middle of the span,the greater the slip.