竖张法双折线体外预应力加固RC梁挠度计算  

Deflection Calculation of Double Broken Line External Prestressing Reinforcement RC Beam with Vertical Tensioning Method

作　　者：颜燕祥 刘进军[1] 李峻峰[1] 王天稳[1] 

机构地区：[1]湖北工程学院土木工程学院,孝感432000

出　　处：《混凝土与水泥制品》2017年第8期63-68,共6页China Concrete and Cement Products

摘　　要：采用体外预应力竖向张拉双折线布筋方法,对2根矩形对比梁,三组不同预应力筋配筋率、不同工况的9根矩形钢筋混凝土简支梁进行了加固试验研究。在考虑二次效应、体外预应力筋有效应力和加固工况的影响下,对加固梁的短期刚度进行了验证分析计算,得到了加固梁短期刚度计算公式的适用范围,并计算得到了试验梁的短期挠度值。The external prestressing with double broken line and vertical tensioning method is used to test the deflection behavior of eleven rectangle reinforced concrete beams （two contrastive beams and nine externally reinforced beams with different prestressed reinforcement ratio and reinforced conditions）. The short-term stiffness of flexural member is analyzed and verification considering the secondary effect, the prestressed reinforcement ratio and the reinforcement conditions. The application range of the formula for short-term stiffness and the deflection of reinforced beams are given.

关 键 词：体外预应力 双折线 加固 挠度 

分 类 号：TU378.1[建筑科学—结构工程]