PC梁桥弯曲孔道预应力损失机理研究  

Research on the Mechanism of Prestressed Loss in Curving Hole of Prestressed Concrete Structure Caused by Frictional Resistance

作　　者：张开银[1] 张闪[1] 谢冰阳[1] 范中林[2] 

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]十堰市公路管理局,十堰442000

出　　处：《武汉理工大学学报（交通科学与工程版）》2013年第4期720-724,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：预应力混凝土连续梁桥/连续刚构桥预应力损失过大,导致了桥梁结构过早的失效或破坏.文中通过预应力混凝土结构设计中弯曲孔道接触应力分布形式的理论分析和预应力摩阻损失的试验,指出了现行弯曲孔道有效预应力计算公式的弊端;同时,通过对孔道内预应力束受力模式的探讨,揭示了纵向张拉力作用下预应力束接触位置相对改变而引起预应力弯曲孔道摩阻损失增加的现象.Excessive prestressed loss in prestressed concrete continuous beam bridge and continuous rigid frame bridge cause structures to be different types of diseases.Base on theoretical analysis and experiment,this paper points out the imperfection of the effective prestress formula in curving hole at present.According to the research on the influencing factor of prestressed loss in curving hole of friction coefficient,it plays a remarkable role on the analysis about the prestressed loss in curving hole of prestressed concrete structure.

关 键 词：预应力摩阻损失 接触压力 摩擦系数 

分 类 号：TU378[建筑科学—结构工程]