北碚嘉陵江大桥腹板裂缝防治

在役预应力混凝土连续箱梁桥腹板开裂对桥梁的耐久性和营运安全构成极大的威胁,分析预应力箱梁腹板裂缝的变化规律及产生原因,对预应力混凝土箱梁桥的加固和设计配筋提出建议。通过总结北碚嘉陵江大桥在役10年来箱梁腹板的裂缝分布和状态,发现腹板裂缝集中分布位置和裂缝状态,在此基础上分析各种裂缝产生的力学原因,优化预应力混凝土箱梁桥设计配筋。

Analysis and prevention of the web cracks in Beibei Jialing River Bridge

Existing prestressed concrete continuous box girder cracking poses a grave threat to the durabthty and operational safety of the bridge. In order to analyze the variation of the prestressed box girder web cracking causes, suggestions are given on the reinforcement and design of reinforcement. By summarizing the crack distribution and status of the box girder webs in Beibei Jialing River Bridge for 10 years it has found that cracks in web are centralized in some distribution location as well as the state of cracks. Then analysis is made on the mechanical reasons of the various cracks. The design is optimized on the reinforcement of prestressed concrete box girder bridge.