圆实复式钢管混凝土柱轴压承载力研究  

Investigation on Bearing Capacity of Solid Multibarrel Tube-confined Concrete Columns(CHS Inner and CHS Outer) under Axial Compressive Load

作　　者：张兆强[1] 赵均海[2] 姚勇[1] 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010 [2]长安大学建筑工程学院,陕西西安710061

出　　处：《西南科技大学学报》2008年第1期8-13,共6页Journal of Southwest University of Science and Technology

基　　金：教育部博士点基金资助项目(20040710001);陕西省自然科学基金项目(2005E204)

摘　　要：运用统一强度理论,考虑内、外钢管对内层混凝土的双重约束作用以及钢管因环向受拉导致纵向应力降低的影响,得出了圆实复式钢管混凝土柱轴压极限承载力的计算公式,给出了较为合理的受力和破坏机理的理论解释,并分析了中间主应力等因素对极限承载力的影响规律,极限承载力随着参数b值的增大而增大。所得结果与文献试验结果进行对比,吻合较好,验证了运用统一强度理论进行实复式钢管混凝土柱轴压力学性能分析的可行性和正确性。The ultimate load calculation formula for the solid muhibarrel tube-confined concrete columns （CHS inner and CHS outer） was derived based on the Unified Strength Theory（UST） in this paper. The double restriction effect and the decrease of longitudinal stress because of the hoop tensile tension were considered in the formula. The influence of intermediate principal stress on the ultimate load was studied and the failure mechanism of the column under axial compression load was discussed. The ultimate load increased with the coefiqcient b. The results of the proposed formula are found in good agreement with experiment results.

关 键 词：统一强度理论 复式钢管混凝土 轴心受压承载力 

分 类 号：TU398[建筑科学—结构工程]