圆形钢套管加固混凝土柱的极限承载力(英文)  

Ultimate Strength of Reinforced Concrete Columns Strengthened by Circular Steel Jacketing

作　　者：蔡健[1] 徐进[1] 

机构地区：[1]华南理工大学土木工程系,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2007年第10期78-83,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(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,被加固柱的极限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.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, slenderness 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 columns decreases with the increase in slenderness 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.

关 键 词：加固 圆形钢套管 钢筋混凝土柱 极限承载力 

分 类 号：TU375.3[建筑科学—结构工程]