钢管混凝土短柱轴心受压承载力与钢管作用研究  

Study on compressive strength and steel tube functions of centrally loaded short concrete filled-steel tube columns

作　　者：江枣[1] 钱稼茹[1] 

机构地区：[1]x清华大学结构工程与振动教育部重点实验室,北京100084

出　　处：《建筑结构》2010年第8期94-98,共5页Building Structure

基　　金：国家自然科学基金重大研究计划重点项目(90815025);北京市科技计划重点项目(D09050600370000);北京市教委科技计划重点项目(KE200910005008)

摘　　要：为研究钢管混凝土短柱轴心受压承载力与钢管的作用,通过理论分析,建立了钢管约束承载力提高系数λ与套箍指标、钢管纵向应力和环向应力的关系。通过对124根轴心受压钢管混凝土短柱试验结果的分析,建立了λ与套箍指标和钢管屈服强度的关系式,提出了引入λ的钢管混凝土短柱轴心受压承载力计算公式。公式反映了钢管的直接承载作用和约束作用的大小,计算结果与试验结果符合良好。To study the compressive strength and steel tube functions of centrally loaded short concrete filled-steel tube columns,the relationship between the strength enhancement factor λ due to steel tube confinement,the longitudinal stress and ring stress of steel tube was established by theoretical analysis.By analysis of the test results of 124 short concrete filled-steel tube columns subjected to centric axial compressive loads,the relationship between λ and the confinement index and yield strength of steel tube is established and a formula for calculating the centric compressive strength of short concrete filled-steel tube columns is proposed.The factor λ is introduced in the formula and the function of steel tube is reflected.The calculating results have good agreement with the test results.

关 键 词：钢管混凝土短柱 轴心受压承载力 钢管作用 钢管约束承载力提高系数 

分 类 号：TU352.1[建筑科学—结构工程]