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在钢框架结构中,梁柱节点是最为复杂且最为重要的部分。利用有限元软件ANSYS建立了3组不同梁高差的钢管柱框架节点模型,对同时加设上下传力件的钢管柱框架节点进行受力性能分析,并与仅加设上传力件的节点和传统常规节点进行对比,通过对荷载-位移曲线、von Mises应力分布等方面的分析,讨论加设传力件对改进钢框架节点工作性能的作用。结果表明,仅加设上传力件对节点域受力性能改善并不明显,当同时加设上下传力件后,节点部位刚度、屈服承载力和极限承载力显著提高,并能保证节点部位良好的塑性变形能力,避免节点先发生破坏,有效实现柱外传力。
Beam-column joints are the most complex and important part of a steel frame structure. Three finite element models of steel pipe column and frame with different beam height differences were established by using finite element software ANSYS. The mechanical behavior of the steel pipe and frame column joint with up-and-down force components was analyzed. Traditional conventional nodes are compared. Through the analysis of load-displacement curve and von Mises stress distribution, the effect of adding transmission members on improving the working performance of steel frame joints is discussed. The results show that it is not obvious that only the uploading force component can improve the mechanical performance of the joint domain. When the up-and-down force components are added simultaneously, the stiffness, yield strength and ultimate bearing capacity of the joint are significantly improved, and the node location is good Of the plastic deformation capacity, to avoid damage to the node first, the effective realization of force transmission outside the column.