Abstract: Based on the stochastic dynamics and damage cumulation analysis, this paper anslyses the dynamic responses of highway bridge under driving vehicles action, its repeating stresses and strains make the structure fatigue damage cumulation. From the fatigue resistance and stress spectrum of bridge structure, the dynamic fatigue reliability of highway bridge is studied.

摘要： 综合随机动力学和疲劳累积损伤理论对桥梁结构受行驶车辆动荷载作用所产生的重复动应力和动应变, 及其使桥梁结构形成的疲劳累积损伤进行了论述, 并从结构疲劳抗力和动荷载效应两方面系统地分析了公路桥梁动力疲劳可靠性.

关键词: 桥梁结构, 随机变量, 累积损伤, 疲劳可靠性