预应力次弯矩的设计研究  

Studies on Design of Prestressing Secondary Moment

作　　者：薛伟辰[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《同济大学学报（自然科学版）》2001年第6期631-635,共5页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金资助项目 (5 0 0 0 80 12 );教育部高等学校骨干教师资助项目

摘　　要：针对我国现行唯一的预应力结构专业设计规程———《无粘结预应力混凝土结构技术规程》(JGJ/T 92 -93)中有关预应力次弯矩条款的局限性 ,对预应力混凝土超静定结构两类极限状态设计中如何考虑预应力次弯矩的问题进行了较为深入的研究 .并基于作者首先提出的“积极、有效地利用预应力次弯矩”的设计思想 ,对预应力束的优化布置方案、预应力束的截面偏心距e和拐点系数α的合理取值、提高预应力束的有效预应力Npe等问题 。In order to overcome the drawback in design regulations about prestressing secondary moment in 《Technical Codes of Unbonded Prestressed Concrete Structures》(JGJ/T 92-93),the only special design code at present time in China,the problem about how to correctly consider the prestressing secondary moment in design of two categories of limit states of prestressed concrete indeterminate structures are studied in detail.On principle of efficiently utilizing the prestressing secondary moment(first put forward by the author),problems about optimum arrangement of tendons,rational value of sectional eccentricity e and inflection point coefficient α of tendons,how to raise the efficient prestressing force N pe of tendons are also studied on the basis of results of theoretical analysis,and the corresponding design suggestions are put forward in this paper.

关 键 词：预应力次弯矩 超静定结构 设计 预应力束 预应力混凝土 有效预应力 预应力次内力 

分 类 号：TU378[建筑科学—结构工程]