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我国现行GB 50010-2002《混凝土结构设计规范》集中荷载与均布荷载作用下的钢筋混凝土梁斜截面受剪承载力计算公式中,关于剪跨比的不同考虑给设计人员带来诸多不便,且2种计算公式的配箍率差异较大.针对以上问题,本文分析了影响钢筋混凝土梁斜截面受剪承载力的主要因素,对已搜集到的国内外钢筋混凝土梁斜截面受剪承载力的试验资料,运用数理统计的方法,优选主要参数,同时参考国内外混凝土结构设计规范的相关规定,提出了钢筋混凝土梁斜截面受剪承载力的统一计算公式,并利用结构可靠度分析中的一次二阶矩法计算了建议公式的可靠指标.可靠度分析结果表明,建议公式的可靠指标满足GB 50068-2001《建筑结构可靠度设计统一标准》的要求,可供规范修订时参考.
China’s current GB 50010-2002 “Code for the design of concrete structures” concentrated load and uniform load under the load-bearing capacity of the reinforced concrete beam oblique shear formula, the different considerations on the shear-span ratio to the designer to bring a lot of inconvenience, and The two kinds of formulas have large differences in the stirrup ratio.According to the above problems, the paper analyzes the main factors affecting the shear strength of the reinforced concrete beam oblique section, and analyzes the shear strength of the inclined section of the reinforced concrete beam Test data, using mathematical statistics method, the preferred main parameters, at the same time with reference to the relevant provisions of the design rules of concrete structures at home and abroad, proposed a uniform formula for calculating the shear strength of reinforced concrete beam oblique section, and the use of structural reliability analysis of a The second order moment method is used to calculate the reliability index of the proposed formula.The reliability analysis shows that the reliability index of the proposed formula meets the requirements of GB 50068-2001 Unified Design Standard for Reliability of Building Structures and can be referenced for the revision of the code.