正交异性钢桥面疲劳分析方法研究综述

Overview of Fatigue Analysis Method for Orthotropic Steel Deck

正交异性钢桥面构造细节复杂且构件间大量采用焊缝连接,在反复交变车辆载荷的作用下存在突出的疲劳开裂风险,而疲劳试验通常被认为是研究正交异性钢桥面疲劳性能的最直观有效手段。但疲劳试验周期长、成本高,直接应用于工程实践的局限性较大。为此,大量研究者基于数值模拟提出了名义应力法、结构热点应力法、局部应力法和断裂力学法等疲劳性能评价方法。这几种评价方法的原理和应用场景各不相同,并各有优缺点及其适用条件。

The structural details of orthotropic steel deck are complex and the welding joints are widely used among the members.There is the great risk of fatigue cracking under the repeating vehicle loads.The fatigue tests are often considered as the most intuitive and effective means to study the fatigue properties of orthotropic steel deck.However,the limitation of fatigue test is great in the direct application into the engineering practice because of its long period and high cost.Therefore,based on the numerical simulation,the fatigue property evaluation methods of nominal stress method,structural hotspot stress method,local stress method and fracture mechanics method are proposed by many researchers.The principles and application scenarios of these evaluation methods are different.And each has its advantages,disadvantages and application conditions.