论文部分内容阅读
针对带加劲肋十字型钢管节点采用有限元方法和足尺试验研究其承载力,比较两种方法的计算结果,探讨有限元中钢管节点屈曲的模拟方法,分析加劲肋贯穿对承载力的影响,最后将试验和计算结果与规范进行比较。研究表明:加带加劲肋十字型钢管节点支管轴压的最终破坏形态为环板的面外失稳;有限元中初始缺陷的最大幅值取主管管径的1/1000进行钢管节点屈曲分析是合理的;加劲肋贯穿主管的工艺可以一定程度上提高节点的刚度和承载力。
In this paper, the finite element method and the full-scale test are used to study the bearing capacity of the cross-section steel pipe joints with stiffeners. The calculation results of the two methods are compared. The simulation method of the buckling of the steel pipe joints in the finite element method is discussed and the influence of stiffener penetration on the bearing capacity is analyzed. Finally, the test and calculation results are compared with the norms. The results show that the ultimate failure mode of the axial compression of the cross-section steel pipe joints with stiffeners is the out-of-plane buckling of the ring plate. The maximum amplitude of the initial defects in the finite element is about 1/1000 of the pipe diameter of the main pipe. Reasonable; stiffener through the competent process can to some extent improve the node stiffness and bearing capacity.