结构工程师2025，Vol.41Issue(6)：41-51,11.DOI:10.15935/j.cnki.jggcs.202506.0005
中外规范圆钢管混凝土短柱轴压承载力公式计算精度分析
Calculation Accuracy Analysis of Axial Compressive Bearing Capacity Formulas for Concrete-Filled Circular Steel Tube Short Columns in Chinese and Foreign Codes
摘要
Abstract
Concrete-filled circular steel tubes(CFCSTs)are widely used in high-rise and long-span structures for their superior bearing capacity,ductility,and construction efficiency.However,the axial compressive capacity calculation provisions for CFCST short columns differ between Chinese and foreign codes.Therefore,it is essential to evaluate the calculation accuracy of the axial compressive bearing capacity formulas for CFCST short columns in various national codes.To this end,the two research methods("hoop theory"and"unified theory")were reviewed,and the differences in axial compression capacity using the two theories were compared.The calculation provisions of the axial compressive capacity for CFCST short columns in Chinese and foreign codes were introduced in detail,and the similarities and differences in the formulas were briefly analyzed.Based on a large amount of concrete material test data and 378 CFCST short column axial compression test results,conversion relationships for various concrete material indexes were established to unify the axial compression test results,and the calculation accuracy of each code formula was further analyzed.The results show that the axial compressive bearing capacity ratios using"hoop theory"and"unified theory"increase and then decrease as the confinement index increases,and the ratios are related to the core concrete compressive strength confinement improvement factor.The calculation accuracy of the"hoop theory"and"unified theory"formulas in"Technical code for concrete-filled steel tubular structures"(GB 50936-2014)is comparable,and the calculated values are closer to the average values,with the lowest safety margin.The calculation accuracy of"Recommendations for design and construction of concrete filled steel tubular structures"(AIJ—2008)is second,and the calculation accuracy of"Design of composite steel and concrete structures-Part 1.1:General rules and rules for buildings"(EN 1994-1-1:2004)is lower than that of AIJ—2008,but higher than that of"Specification for structural steel buildings"(AISC 360‒22).关键词
圆钢管混凝土/短柱/轴压承载力/中外规范/计算精度Key words
concrete-filled circular steel tube(CFCST)/short columns/axial compressive bearing capacity/Chinese and foreign codes/calculation accuracy分类
建筑与水利引用本文复制引用
王雷,李超,李翔宇..中外规范圆钢管混凝土短柱轴压承载力公式计算精度分析[J].结构工程师,2025,41(6):41-51,11.基金项目
工程建设标准化基础研究(2023年)项目 （2023年）
