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钢结构受碰撞冲击的过程是一个复杂的非线性过程。采用Abaqus/Standard模拟H型钢压弯柱的平衡状态,再以此为初始状态在Abaqus/Explicit模块中执行横向撞击的数值模拟,通过考察系统能量转化关系和沙漏能占比验证有限元模型的合理性,研究了压弯柱受横向撞击的破坏模式并进行了动态响应的参数分析。结果表明:压弯H型钢柱受横向撞击的破坏是翼缘局部失稳引起的整体失稳破坏,是否破坏主要取决于撞击动能;撞击动能、撞击质量、撞击速度、撞击位置距固端约束的距离和轴压力的增加都会加剧H型钢柱的动态响应;存在减弱压弯柱动态响应的轴压力-弯矩荷载组合,但随着叠加弯矩值的增大,柱的变形开始加剧直至失稳破坏。
The impact of the impact of the steel structure is a complex nonlinear process. Abaqus / Standard was used to simulate the equilibrium state of the H-Beams. Then the initial state was used to perform the numerical simulation of the lateral impact in the Abaqus / Explicit module. The reasonable finite element model was verified by examining the system energy conversion relationship and hourglass energy ratio In this paper, the damage modes of the transversely impacted column under bending are studied and the parameters of the dynamic response are analyzed. The results show that the failure of H-beam columns subjected to transverse impact is the overall instability caused by the local instability of the flange. Whether the damage depends on the kinetic energy of impact depends on the kinetic energy, impact mass, impact velocity, The increase of the distance and the axial pressure will aggravate the dynamic response of the H-shaped steel column. There is a combination of the axial pressure and the bending moment load that weakens the dynamic response of the bending and bending columns. However, with the increase of the superimposed bending moment, the deformation of the column begins to aggravate until the instability damage.