现浇预应力混凝土箱梁后浇段施工缝开裂分析

Analysis on post pouring bond construction joint cracking of cast-in-situ prestressed concrete box girder

通过建立计算模型进行计算分析,与现实中存在的桥梁状况进行对比,分析探讨现浇预应力梁的一种施工方案———预留后浇段施工方法设计和施工的现浇预应力箱梁施工缝处开裂成因,研究其对结构安全性的影响,以指导实践。

Through comparing calculation model to existing bridge,the paper explores a kind of construction scheme of cast-in-situ prestressed beam-preserving post-pouring construction design method and cast-in-situ prestressed box girder construction joint cracking causes,and studies its impact upon structural security,with a view to guide practice.