（1 同济大学预应力研究所， 上海 200092; 2 同济大学先进土木工程材料教育部重点实验室， 上海 200092）

［摘要］以已有试验数据为基础，分析了配高强钢筋的部分预应力混凝土梁在静力荷载作用下影响其抗弯承载力的主要因素，提出了相应的计算方法，指出在进行配高强钢筋的混凝土梁的设计计算时，应考虑界限受压区高度的变化；分析了配高强钢筋的部分预应力混凝土受弯构件的抗裂性及裂缝性能，对规范及修正公式进行了验证，为该类结构的设计提供了参考。

［关键词］预应力混凝土结构； 高强钢筋； 承载力； 裂缝

中图分类号：TU378-2文献标识码：A文章编号：1002-848X(2018)08-0052-04

Research on flexural capacity and crack property of prestressed beams reinforced with highstrength steel bars

Xiong Xueyu1,2, Hua Nan1, Wang Yiqingzi1

(1 Institute of Prestressed Structures, Tongji University, Shanghai 200092, China;  2 Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, Shanghai 200092, China)

Abstract:Based on the analysis of existing test data, the main factors affecting the flexural capacity of partially prestressed concrete beams reinforced with high-strength steel bars were analyzed and a method of calculation was proposed, and the change of the compression zone height should be taken into account when designing and calculating concrete beams reinforced with high-strength steel bars. The crack resistance and property of partially prestressed beams reinforced with high-strength steel bars was also analyzed. The related equations in code has been carefully verified and a reference for the future designing of such structures has been provided.

Keywords:prestressed concrete structure; high-strength steel bar; bearing capacity; crack

*国家自然科学基金资助项目（５１１７８３２８，５１５７８４００），住房城乡建设部研究开发项目（２０１６-Ｋ5-０２０），上海市科学技术委员会科研计划项目（１６ＤＺ１２０１６００,13231200903），上海市住房和城乡建设管理委员会科研项目（２０１６-００１-００３）。

作者简介：熊学玉，博士，教授，博士生导师， Email：xueyu@tongji.edu.cn。