论文部分内容阅读
某铁路特大桥的主桥部分采用预应力混凝土刚构连续梁桥,本文采用光弹性模型冻结应力法对该刚构连续梁桥墩梁固节点结构进行了应力分析,给出了结构边界应力分布和主应力迹线。应用ANSYS软件对墩梁固节点实际结构进行了有限元计算。将实验与有限元分析结果进行了比较,结果表明,实验应力分析法与有限元数值法吻合较好。在有限元分析中,对墩梁固节点结构梁端加载边界的影响区进行了研究,通过合理选择梁的长度可以有效减小局部应力。模型实验和有限元计算的结果为结构的优化设计提供了重要的依据。
The main bridge of a railway bridge adopts prestressed concrete rigid frame continuous girder bridge. In this paper, the stress analysis of the rigid joints of the rigid frame continuous beam bridge pier beam is carried out by the photoelastic model freezing stress method. The stress distribution and Main stress trace. The finite element method is used to calculate the actual structure of the pier-girder joint with ANSYS software. The results of the experiment and the finite element analysis are compared. The results show that the experimental stress analysis method is in good agreement with the finite element method. In the finite element analysis, the influence zone of the beam end loading boundary of the beam-to-beam joint structure is studied, and the local stress can be effectively reduced by reasonably selecting the length of the beam. The results of model experiment and finite element calculation provide important basis for the optimal design of the structure.