环境因素与疲劳荷载耦合作用下预应力混凝土结构性能研究现状与展望

Review and prospect of prestressed concrete structural performance under environment and fatigue loads coupling effects

预应力混凝土结构广泛地应用于桥梁工程中。随着车辆通行量的日益增加、环境的逐渐恶化,预应力混凝土桥梁服役性能日渐劣化。对环境因素与荷载(尤其疲劳荷载)作用下预应力混凝土桥梁结构服役性能的研究成为热点。从材料、结构构件、研究方法等方面介绍了环境与荷载共同作用下预应力混凝土桥梁结构服役性能以及研究方法、寿命预测方法的研究现状以及存在的问题。在此基础上,探讨了环境与荷载耦合作用下预应力混凝土桥梁结构服役性能研究的发展方向。

The prestressed concrete structures are widely used in bridge engineering. With the gradual deterioration of the environment and the increasing of traffic volume,the prestressed concrete bridge service performance is gradually deteriorated. The research on serv-ice performance of the prestressed concrete bridge under the coupling effect of environmental factors and load（ especially the fatigue load）has become a hot area of research. The research status and present problems of service property and life prediction of prestressed concrete bridge structures under load and environment coupling effects were discussed from the aspects of material characteristics,struc-tural performance and test method. On this basis the development of research on of service property of prestressed concrete bridge struc-tures under load and environment coupling effects was debated.