CAJ | 학술논문

针对钢管混凝土短柱轴心受压过程中钢管与核心混凝土在极限承载阶段时的多向应力状态，引入钢管纵向容许应力折减系数与混凝土抗压强度提高系数，对钢管混凝土的应力状态、轴压承载力计算进行理论分析，给出各系数的计算方法，并将计算值与试验值进行对比。结果表明：该方法计算值与试验值较为吻合；钢管纵向容许应力折减系数的引入有助于加深对钢与混凝土二者之间相互作用的认识，在工程常用范围内可为钢管混凝土结构节点设计提供参考。
침대강관혼응토단주축심수압과정중강관여핵심혼응토재겁한승재계단시적다향응력상태，인입강관종향용허응력절감계수여혼응토항압강도제고계수，대강관혼응토적응력상태、축압승재력계산진행이론분석，급출각계수적계산방법，병장계산치여시험치진행대비。결과표명：해방법계산치여시험치교위문합；강관종향용허응력절감계수적인입유조우가심대강여혼응토이자지간상호작용적인식，재공정상용범위내가위강관혼응토결구절점설계제공삼고。
According to multiaxial stress state of steel tube and concrete under ultimate state in concrete‐filled steel tubular (CFST )stub columns under axial load ,longitudinal allowable stress reduction factor of steel tube and compressive strength improvement factor of concrete were defined to analyze the stress state and calculate the axial bearing capacity ,and the calculation methods of the factors were proposed .Comparison between the calculation values of the method and test values was carried out . The results show that the calculation results are in good agreement with the test results . The proposed longitudinal allowable stress reduction factor contributes to understanding interaction mechanism and can provide references for joint design of CFST structure in scope of engineering .