基于损伤-断裂力学的钢桥面铺装体系疲劳特性研究  

Research on Fatigue Characteristic of Steel Bridges Deck Pavement by the Method of Damage-fracture Mechanics

作　　者：徐勋倩[1] 黄卫[1] 吴国庆[2] 

机构地区：[1]东南大学ITS研究中心,江苏南京210096 [2]南通大学建工学院,江苏南通226007

出　　处：《公路交通科技》2006年第4期71-75,83,共6页Journal of Highway and Transportation Research and Development

基　　金：南通大学自然科学基金资助项目(03040103)

摘　　要：基于损伤-断裂力学的方法就钢桥面沥青混合料铺装体系在循环荷载作用下的力学行为和疲劳损伤特性进行理论分析。采用粘弹性损伤模型的能量转换方法对钢桥面沥青混合料层应力场、应变场及损伤场分布状况和演变规律进行研究,同时,建立了结构的疲劳寿命理论预测公式。最后,通过南京长江第二大桥钢桥面铺装体系疲劳实例分析,验证了预测公式的合理性,并与其他预测方法的结果进行了比较。Based on the method of damage-fracture mechanics, the mechanical behavior and fatigue fracture characteristic of asphalt mixture surfacing under repeated load was analyzed.Adopting the viscous-elastic method of energy conversion, the stress, strain and fracture distribution or evolvement patterns of steel hridges deck asphalt mixture surfacing composite structure were explored. At the same time, its fatigue life pre-evaluating formula was proposed.Finally, comparing with other methods, an example of the steel hridges deck pavement of Nanjing Second Yangtze River Bridge, was provided to test the rationality of the pre-evaluating formula.

关 键 词：损伤-断裂力学 钢桥面 铺装体系 疲劳特性 

分 类 号：U443.33[建筑科学—桥梁与隧道工程]