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本文通过12根偏压型钢钢筋混凝土(SRC)柱的试验,对型钢钢筋混凝土柱正截面发生破坏的形态、特征以及承载力等内容进行了研究。作为试验结果的补充和验证,本文采用有限条带法,对型钢钢筋混凝土柱正截面受力行为进行了全过程模拟试验分析。在此基础上,运用结构分析理论,对型钢钢筋混凝土柱正截面承载力破坏的力学模型、承载力确定原则和截面内力特征进行了分析,提出了建议的型钢钢筋混凝土柱正截面承载力简化计算公式。以相对偏心距e_0/h,长细比l_0/h为参数,对型钢钢筋混凝土柱的二阶效应进行了讨论,结合试验结果分析,提出了考虑柱二阶变形的正截面简化承载力计算公式。计算结果表明,理论分析与试验结果符合良好。
In this paper, through the test of 12 biased steel reinforced concrete (SRC) columns, the shape, characteristics and bearing capacity of the normal section of steel reinforced concrete column were studied. As a supplement and verification of the test results, the finite-strip method was used in this paper to conduct a full-scale simulation test of the normal section force behavior of steel reinforced concrete columns. On this basis, using structural analysis theory, the mechanical model of the failure of the normal section bearing capacity of steel reinforced concrete columns, the principle of determining the bearing capacity and the internal force characteristics of the section were analyzed, and the simplified calculation of the normal section bearing capacity of the reinforced concrete columns was proposed. formula. Taking the relative eccentricity e_0/h and the slenderness ratio l_0/h as parameters, the second-order effects of steel reinforced concrete columns are discussed. Combined with the analysis of experimental results, a formula for calculating the simplified bearing capacity of normal sections considering column second-order deformation is proposed. . The calculation results show that the theoretical analysis and test results are in good agreement.