内圆外方复合钢管高强混凝土短柱受压承载力计算  

Calculation of Compression Bearing Capacity of Composite-sectioned High Strength Concrete Filled Steel Tubular Short Columns

作　　者：张兆强[1] ZHANG Zhao-qiang

机构地区：[1]西南科技大学土木工程与建筑学院,绵阳621010

出　　处：《混凝土与水泥制品》2019年第2期44-47,共4页China Concrete and Cement Products

基　　金：国家自然基金资助项目(51308479);四川省科技厅应用基础项目(2018JY0443);四川省教育厅资助项目(18CZ0012);绵阳市科技攻关项目(15S-02-3)

摘　　要：采用统一强度理论对内圆外方复合钢管高强混凝土短柱的受压承载力进行了理论分析,考虑了内、外两层钢管对内层混凝土的双重约束作用以及中间主应力和偏心距的影响,分别推导得出了内圆外方复合钢管高强混凝土短柱轴心受压、偏心受压极限承载力计算公式。通过与相关文献资料试验实测数据进行对比,验证了公式的可行性和正确性,分析结果表明,内、外钢管对于其轴压极限承载力的主要贡献是对混凝土提供了约束作用,而不是自身的轴向承载贡献,研究成果可为工程实践提供参考。By using the Unified Strength Theory,the theoretical analysis on compression bearing capacity of the composite-sectioned high strength concrete filled steel tubular short columns is carried out.And the corresponding ultimate load calculation formulas are also obtained,in which the double restriction effect,the influence of intermediate principal stress and eccentricity are considered.The calculation results are compared with experimental data,and it is found that the calculation results and experimental data are more consistent,which indicates that the formulas are correct and feasible.The analysis results show that the main contribution of the inner and outer steel tubular to the ultimate bearing capacity of the axial compression members is the constraint effect on the concrete,not the axial bearing contribution of its own.The research results can provide a reference for the engineering practice.

关 键 词：统一强度理论 复合钢管高强混凝土短柱 受压承载力计算 

分 类 号：TU528.73[建筑科学—建筑技术科学]