体外预应力混凝土简支梁的应力分析  

Mechanics Analysis of Externally Presstressed Simple beams

作　　者：周品芳[1] 张仲先[1] 

机构地区：[1]华中科技大学土木工程与力学学院,武汉430074

出　　处：《特种结构》2005年第1期21-24,共4页Special Structures

摘　　要：本文通过一组体外预应力简支梁的试验 ,研究了梁整体变形和体外预应力筋变形的关系 ,分析了因体外预应力偏心距引起的二次影响和转向块及预应力筋的数量及布置方式对体外预应力简支梁性能影响 ,推导出了正截面极限承载力计算公式 ,得出了一些有益的结论 ,为进一步深入研究体外预应力混凝土结构提供了实践与理论分析的依据。Along with experiment,the changes of the tendons of externally prestressed simple beams throughout the loaded process are analysed,the second-order effects in different stages are observed and several factors which may influence the behaviors of externally prestressed concrete simple beams,such as reinforcement ratio,deviators and span-to-depth ratio are also analysed,simple formula of calculating the ultimate flexural strength is presented Finally,through analyzing the stress of externally tendons some useful results,which also may be helpful for those who research on this,are got in the paper.

关 键 词：体外预应力混凝土简支梁 简支梁 正截面极限承载力 预应力筋 体外预应力混凝土结构 转向块 变形 应力分析 布置方式 偏心距 

分 类 号：TU378[建筑科学—结构工程]