建筑结构

2010, v.40;No.320(08) 94-98

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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

江枣;钱稼茹;
Jiang Zao,Qian Jiaru(Key Laboratory for Structure Safety and Durability of Education Ministry,Tsinghua University,Beijing 100084,China)

摘要(Abstract):

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(KeyWords): 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
short concrete filled-steel tube column;centric axial compressive strength;steel tube function;strength enhancement factor;steel tube confinement

Abstract:

Keywords:

基金项目(Foundation): 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)

作者(Author): 江枣;钱稼茹;
Jiang Zao,Qian Jiaru(Key Laboratory for Structure Safety and Durability of Education Ministry,Tsinghua University,Beijing 100084,China)

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DOI: 10.19701/j.jzjg.2010.08.021

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