局部张拉预应力筋加固混凝土超静定梁的内力计算  

Inner force on strengthening concrete statically indeterminate beams prestressed with localized tendons

作　　者：王新玲[1] 曹双寅[1] 

机构地区：[1]东南大学土木工程学院,南京210096

出　　处：《东南大学学报（自然科学版）》2004年第1期89-91,共3页Journal of Southeast University：Natural Science Edition

摘　　要：针对局部张拉预应力筋加固混凝土超静定梁内力 ,采用结构力学方法进行了计算分析 .首先讨论了不等跨连续梁在不同部位张拉预应力筋时的内力计算 ,得出了加固结构不同截面时超静定梁内支座产生的主、次弯矩及综合弯矩的计算表达式 .在此基础上 ,分析了等跨连续梁的内力计算 ,根据叠加原理 ,即可得到超静定梁多个截面同时加固时的总弯矩 .论文还分析了预应力筋位置对加固连续梁内力的影响 .The use of localized tendons to prestress statically indeterminate beams is examined. The two spans continuous beams should be calculated to determine the prestressing moments produced by localized tendons. Based on the analysis, the moments formulas should be computed, which will lead to strengthening the RC continuous beams of the three spans prestressed with localized tendons. By means of the principle of superposition, total moments can be obtained when many sections should be strengthened. The effects of the continuous beams' moments produced location of prestressing are analyzed. The results should be used to design concrete continuous beams of two and three spans prestressed with localized tendons.

关 键 词：局部张拉 体外预应力 加固 混凝土超静定粱 

分 类 号：TU378.2[建筑科学—结构工程]