钢桥面板横隔板面内变形疲劳试验模型优化与裂纹扩展特性分析

Optimization of In-plane Deformation Fatigue Test Model and Analysis of Crack Propagation Characteristics of Diaphragm of Steel Bridge Deck

横隔板与U肋交叉细节是正交异性钢桥面板疲劳损伤最为严重的构造细节,对该细节进行有限元数值模拟和试验研究是十分必要的。采用ANSYS有限元软件,将传统横隔板与U肋交叉细节疲劳节段试验模型进行优化,得到了符合该细节实际受力模式的简化疲劳试验模型。在此基础上,对横隔板与U肋交叉细节疲劳裂纹进行了有限元数值模拟。

The cross details of diaphragms and u ribs are the most serious structural details of orthotropic steel bridge deck fatigue damage,so it is necessary to carry out finite element numerical simulation and Experimental Research on the details.In this paper,ANSYS finite element software is used to optimize the fatigue test model of traditional diaphragm and U-rib cross details,and a simplified fatigue test model is obtained,which is in line with the actual stress mode of the details.On this basis,the finite element numerical simulation of fatigue crack in the cross details of diaphragm and U-rib is carried out.