体外预应力结构预应力筋在外力作用下的应力分析  

Use of Nonlinear Finite Element in the Analysis of Tendons in the Externally Prestressed Structure

作　　者：巢斯[1] 易发安[1] 孙海[1] 

机构地区：[1]同济大学,上海200092

出　　处：《结构工程师》2000年第1期29-33,共5页Structural Engineers

摘　　要：本文通过对六根梁的试验分析了体外预应力筋在整个加载过程中的应力变化。考虑到体外预应力结构的特殊性 ,特别是预应力筋的位置以及预应力筋分析的复杂性 ,笔者同时将预应力筋在转向块处的摩擦模型[5 ] 及非线性有限元方法应用于体外预应力梁的预应力筋分析中 。With experiment the authors analyse the changes of the tendons of externally prestressed beams throughout the loaded process. In consideration of the peculiarity of externally prestressd structure, expecially the location of tendons in externally prestressed structure and the complexity in the analsis of prestressed tendons, here the authors bring out a mode of prestressed tendons near the deviators, and the authors testify that with mode and in connection with nonlinear finite element method we can solve this problem and other problems that have some connection with it. At the same time through analysing the stress of externally tendons we got some result that is useful for designers..

关 键 词：体外预应力筋 摩擦 转向块 预应力结构 应力分析 

分 类 号：TU378.1[建筑科学—结构工程]