【作者】 顾炜； 熊学玉； 黄鼎业；

【Author】 Gu Wei, Xiong Xueyu, Huang Dingye(Department of Building Engineering, Tongji University, Shanghai 200092, China)

【机构】 同济大学建筑工程系；

【摘要】 体外预应力是后张预应力体系的一个重要分支,多应用于桥梁和建筑结构以及结构加固补强之中。其设计与无粘结预应力即有相似之处,也有差异。以近期上海市标准《预应力混凝土结构设计规程》修订为背景,介绍体外预应力研究进展,主要包括力筋极限应力取值,二次效应的考虑等方面;同时对比分析了国内外规范对于体外预应力设计的条文。在上述工作基础上提出体外预应力结构设计条文建议。部分研究内容已被《规程》征求意见稿采纳。更多还原

【Abstract】 External prestressing is an important branch of post-tensioning system, which has been more and more used in bridge & building structures as well as structure strengthening. With the background of newly revised Design Code for Prestressed Concrete Structures ( local code for Shanghai) , the research development of external prestresing are introduced, mainly focused on ultimate tendon stress and second-order effect; and the design specifications used in both domestic and abroad are comparatively analyzed. Suggestions on the design provisions of externally prestressed structures are proposed, and some have been adopted by the solicit opinions revision on the Code.更多还原