二次受力下碳纤维加固混凝土柱抗剪承载力分析
发布时间：2019-04-13 10:31
【摘要】：采用碳纤维加固抗剪承载力不足的钢筋混凝土柱,由于有轴向力的存在,即存在二次受力问题。根据桁架-拱模型理论对碳纤维加固后的受力进行了分析,综合考虑截面尺寸、配箍率、碳纤维布的折算配箍率、混凝土的软化效应、拱作用等因素,推导出不同剪跨比情况下钢筋混凝土柱在二次受力情况下的抗剪承载力计算公式。通过理论公式计算以往的实验数据,并将理论计算结果、规范计算结果与试验结果进行对比分析。
[Abstract]:The reinforcement of reinforced concrete columns with insufficient shear capacity by using carbon fiber is due to the existence of axial force, that is, the secondary stress problem exists. According to the theory of truss-arch model, the stress after strengthening with carbon fiber is analyzed. The factors such as cross-section size, stirrups ratio, conversion ratio of carbon fiber sheet, softening effect of concrete, arch action and so on, are considered comprehensively. The formulas for calculating the shear capacity of reinforced concrete columns under secondary loading are derived under different shear-span ratios. The theoretical formula is used to calculate the previous experimental data, and the theoretical calculation results, the normative calculation results and the test results are compared and analyzed.
【作者单位】： 河南理工大学土木工程学院;
【分类号】：TU37
[Abstract]:The reinforcement of reinforced concrete columns with insufficient shear capacity by using carbon fiber is due to the existence of axial force, that is, the secondary stress problem exists. According to the theory of truss-arch model, the stress after strengthening with carbon fiber is analyzed. The factors such as cross-section size, stirrups ratio, conversion ratio of carbon fiber sheet, softening effect of concrete, arch action and so on, are considered comprehensively. The formulas for calculating the shear capacity of reinforced concrete columns under secondary loading are derived under different shear-span ratios. The theoretical formula is used to calculate the previous experimental data, and the theoretical calculation results, the normative calculation results and the test results are compared and analyzed.
【作者单位】： 河南理工大学土木工程学院;
【分类号】：TU37
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