预应力混凝土箱梁静载弯曲试验开裂原因分析

Cause Analysis of Cracking in Static-load Bending Test on Prestressed Concrete Box Girder

通过分析铁路预应力混凝土箱梁静载开裂原因,指出造成箱梁开裂的主要原因是混凝土质量缺陷、预应力失控和混凝土保护层厚度不足。针对这些原因提出预防措施。

By analyzing the reason of static-load cracking in prestressed concrete box girder in railway,the article points out the main reasons of box girder cracking are quality defect of concrete,uncontrollable prestress and insufficient thickness of concrete protective cover. It proposes the preventive measures in view of these reasons.