华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (10): 78-83.

• 创刊五十周年纪念专辑 • 上一篇    下一篇

圆形钢套管加固混凝土柱的极限承载力

蔡健 徐进   

  1. 华南理工大学 土木工程系,广东 广州 510640
  • 收稿日期:2007-03-27 出版日期:2007-10-25 发布日期:2007-10-25
  • 通信作者: 蔡健(1959-) ,男,教授,博士生导师,主要从事钢筋泪凝土结构和钢一混凝土组合结构的研究. E-mail:cvjcai@scut. edu. cn
  • 作者简介:蔡健(1959-) ,男,教授,博士生导师,主要从事钢筋泪凝土结构和钢一混凝土组合结构的研究.
  • 基金资助:

    广东省自然科学基金资助项目(020965 )

Ultimate Strength of Reinforced Concrete Columns Strengthened by Circular Steel J acketing

Cai Jian  Xu Jin   

  1. Dept. of Civil Engineering , South China Univ. ofTech. , Guangzhou510640 , Guangdong , China
  • Received:2007-03-27 Online:2007-10-25 Published:2007-10-25
  • Contact: Cai Jian (bom in 1959), male , professor , doctoral supervisor , mainly researches on reinforced concrete structureand steel-concrete composite structure. E-mail:cvjcai@scut. edu. cn
  • About author:Cai Jian (bom in 1959), male , professor , doctoral supervisor , mainly researches on reinforced concrete structureand steel-concrete composite structure.
  • Supported by:

    Supported by Guangdong Provincial NaturalScience F oundation (020965)

摘要: 进行了33 个圆形钢套管加固钢筋混凝土柱在轴心及偏心受压下的试验,研究不同初始轴压比、加固用钢套管厚度、长细比和偏心率下被加固柱的力学性能.研究结果表明,被加固柱的力学性能得到明显的改善,被加固柱的极fR承载力随着长细比和偏心率的增加而降低,而初始轴压比对极限承载力的影响可以忽略.在试验结果的基础上,提出了圆形钢套管加固钢筋混凝土柱极限承载力计算的实用公式,极限承载力的计算结果和试验结果吻合良好.

关键词: 加固, 圆形钢套管, 钢筋混凝土柱, 极限承载力

Abstract:

This paper presents an experimental research on 33 reinforced concrete columns strengthened by circular steel jacketing subjected to axial or eccentric load , and investigates the mechanical properties of the strengthened columns with different original axial compressive ratios , steel jacketing thicknesses , slendemess ratios and eccentricity ratios. Experimental results show that (1) the mechanical properties of the reinforced concrete columns are greatly improved by the strengthening; (2) the ultimate strength of the strengthened CQlumns decreases with the increase in slendemess ratio and eccentricity ratio; and (3) the effect of the original axial compressive ratio on the ultimate strength can be ignored. Furthermore , a practical formula is proposed based on the experimental results to calculate the ultimate strength of the reinforced concrete columns strengthened by circular steel jacketing. The calculated results accord well with the experimental ones.

Key words: strengthening, circular steel jacketing, reinforced concrete column, ultimate strength