带约束拉杆矩形钢管混凝土轴压承载力分析  

Analysis on axial strength of R-CFT stub column with unidirectional binding bars

作　　者：陈曦[1] 周德源[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《沈阳工业大学学报》2008年第5期595-598,共4页Journal of Shenyang University of Technology

摘　　要：为了获得带单向约束拉杆矩形钢管混凝土短柱轴压承载力实用计算公式,进行了试验和分析.根据带拉杆构件的核心混凝土约束应力分布特点,结合现有的试验结果,提出将矩形截面以约束拉杆为界线划分为几个子区域,并将拉杆视为等效钢板的方法,采用已有的钢管混凝土统一理论计算公式计算每个子区域的轴压承载力,得出带单向约束拉杆的矩形钢管混凝土构件轴压承载力计算公式,修正后的公式中考虑了约束拉杆的影响,拓宽了统一理论计算公式的适用性.采用该公式计算的带约束拉杆的矩形钢管混凝土构件轴压承载力与已有的试验结果吻合良好.In order to obtain the practical formula for axial strength of rectangular concrete filled steel tubular （R-CFT） stub column with unidirectional binding bars, a series of tests and analysis were carried out. According to the distribution of confinement stress of core concrete and combining with the existed experimental results, a method which divides the rectangular core concrete into several sub-regions with the binding bars as their borders and takes the binding bars as equivalent steel plates was proposed. The axial strength of each sub-region was calculated by the formula of unification theory. In the revised formula for the prediction of axial strength of R-CFT column, the influence of the binding bars was considered. Thus, the applicability of the unification theory formula gets broadened. The axial strengths of the R-CFT stub column with binding bars predicted by the proposed formula well agree with the experimental results.

关 键 词：矩形钢管混凝土 轴压承载力 约束拉杆 钢管约束效应系数 单向拉杆约束系数 

分 类 号：TU398[建筑科学—结构工程] TV335[水利工程—水工结构工程]