预应力混凝土连续刚构桥腹板斜裂缝发生机理研究  

Investigation of Occurrence Mechanism of Inclined Cracks in Webs of PC Continuous Rigid-Frame Bridges

作　　者：宋随弟[1] 祝兵[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《桥梁建设》2008年第3期71-74,共4页Bridge Construction

摘　　要：根据近些年来国内大跨度连续刚构桥发生开裂及下挠等严重病害的实际状况,分别从设计、施工、运营等环节论述了连续刚构桥斜裂缝的发生机理,揭示了大跨度连续刚构桥发生斜裂缝病害的原因,并提出了相应的原则性预防措施和建议。In view of the status of the severe deteriorations, such as cracking and deflection, having occurred in the domestic long span prestressed concrete （PC） continuous rigid frame bridges in the recent years, this paper discusses the occurrence mechanism of the inclined cracks in webs of the rigid-frame bridges respectively from aspect of design, construction and operation, reveals the causes leading to the deterioration of the inclined cracks and also puts forward the corresponding preventive measures and suggestion in matters of principle.

关 键 词：连续刚构桥 预应力混凝土结构 腹板 斜裂缝 

分 类 号：U448.23[建筑科学—桥梁与隧道工程] U445.71[交通运输工程—道路与铁道工程]