预应力摩擦损失的试验研究  

Experimental study on friction loss of prestress

作　　者：李忠献[1] 吴沛峰[1] 陈培奇[2] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津城市建设学院土木工程系,天津300384

出　　处：《天津城市建设学院学报》2003年第1期28-31,共4页Journal of Tianjin Institute of Urban Construction

摘　　要：通过对某立交桥现浇后张预应力混凝土箱梁预应力钢束的摩擦损失试验 ,测试并理论计算了预应力的摩擦损失 ,推导了该桥预应力钢束与金属波纹管之间的摩擦系数和管道偏差系数 ,指出现行《公桥规》以及当前设计工作中有关预应力摩擦损失计算的不足 。The friction loss of prestress is tested and theoretically calculated by the experimental study on the prestressing friction loss of prestressed wires of the post tensioned prestressed concrete box girder of an overpass casted in situs.The friction factor between the prestressed wires and the metallic corrugated pipes and the bias factor of pipleline are determinated. The deficency in the calculation of friction loss of prestress in the current highway code and designing work is indicated and a rational suggestion is proposed.

关 键 词：预应力混凝土 摩擦损失 波纹管 摩擦系数 偏差系数 

分 类 号：TU378.103[建筑科学—结构工程]