（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HRB500级钢筋部分预应力混凝土梁在静力荷载作用下的刚度和变形的特点，提出了相应的计算方法。明确了HRB500级钢筋用于预应力混凝土结构中的刚度计算方法。探讨了配HRB500级钢筋部分预应力混凝土梁的延性特点及影响延性的因素。为配高强钢筋的预应力混凝土结构设计和刚度变形计算提供了一定的参考。

［关键词］预应力混凝土结构； 高强钢筋； 刚度

中图分类号：TU378-2文献标识码：A文章编号：1002-848X(2018)08-0056-04

Stiffness analysis of partially prestressed concrete flexural members equipped with HRB500 highstrength reinforcementXiong Xueyu1,2, Wang Yiqingzi1, Hua Nan1

(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 existing experimental data, stiffness and deformation characteristics of partially prestressed concrete beams equipped with HRB500 high-strength reinforcement under static loading were analyzed and corresponding calculation method was put forward. Stiffness calculation method of prestressed concrete structure equipped with HRB500 high-strength reinforcement was clarified. The characteristics and influence factor of ductility of partially prestressed concrete beams equipped with HRB500 high-strength reinforcement were discussed. Some references for the distribution of high strength steel prestressed concrete structure design and stiffness calculation were provided.

Keywords:prestressed concrete structure; high strength steel bar; stiffness

*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。