预应力砼超静定结构次弯矩的简捷计算  

Simple and Direct Method of Calculation of Secondary Moment in Statically Indeterminate Prestressed Concrete Structures

作　　者：杨建明[1] 吕志涛[1] 

机构地区：[1]东南大学

出　　处：《建筑结构学报》1989年第3期23-31,共9页Journal of Building Structures

摘　　要：本文提出了计算超静定砼结构中后张预应力引起的次弯矩的简捷方法。本文方法与等效荷载法不同,它是直接从各构件的主弯矩计算次弯矩的方法。本文方法还能准确计算预应力因摩擦损失、锚具回缩损失等引起的沿预应力筋变化时的次弯矩,从而提高了工程设计精度。In this paper, a simple and direct method of calculating secondary moments in statically indeterminate structures caused by post-ten-sioned prestress is presented. It is different from the equivalent load method, since the secondary moments can be computed directly from the primary moments by the present method. The secondary moments which are caused by post-tensioning and are varying along the tendons due to prestressing losses through friction in ducts and slip in anchorages can also be accurately calculated, resulting in improvement of precision of the method of design.

关 键 词：预应力砼 超静定结构 次弯矩 等效荷载法 结构力学 

分 类 号：TU322[建筑科学—结构工程] TU378