椭圆钢管混凝土轴压短柱承载力分析  

Study on the axial ultimate bearing capacity of elliptical concrete filled steel tubular stub columns

作　　者：杜文超[1] 赵均海[1] 张常光[1] 殷佳[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061

出　　处：《混凝土》2016年第4期46-49,共4页Concrete

基　　金：国家自然科学基金项目(41202191);高等学校博士学科点专项科研基金(2012M562358;2014M562357);陕西省自然科学基金资助项目(2014JQ7290);长安大学中央高校基本科研业务费专项资金资助(2014G1281072;2014G1281071;2014G5280010)

摘　　要：采用统一强度理论,考虑材料拉压比和中间主应力的影响,引入考虑尺寸效应的有效约束系数,建立了椭圆钢管混凝土轴压短柱的极限承载力计算式。将计算式计算结果与文献资料数据及相关文献的计算结果进行对比,吻合良好,验证了计算式的正确性。影响因素分析表明:椭圆钢管混凝土轴压短柱的极限承载力随参数b的增加而增大,随长短轴之比m/n的增加而减小。所得结果可为椭圆钢管混凝土轴压短柱的设计、施工及推广提供一定的理论依据。On the basis of the unified strength theory, considering the impact of the ratio of tension and compression of the material and the intermediate principal stress, and with the introduction of the effective constraint factor of the size effect to analyze the restraints of steel tube to concrete, thus established the formula of ultimate bearing capacity of elliptical concrete - filled steel tubular stub columns. By comparing the results of proposed formula with that of experiments and relevant literatures, the correctness of proposed formula was proved. Some impacts of relevant parameters were also analyzed. The results show that the ultimate bearing capacity of elliptical concrete filled steel tube columns under axial compression increases with increasing of parameterand decreasing of long and short axis ratio.And the Solution may have some important practical value.

关 键 词：统一强度理论 椭圆钢管混凝土 轴压短柱 极限承载力 

分 类 号：TU528.01[建筑科学—建筑技术科学]