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根据我国《混凝土结构设计规范》(GB50010—2002)和《混凝土结构加固设计规范》(GB50367—2006)中假定的混凝土应力-应变关系和极限应变值,推导了粘贴钢板能被充分利用的界限条件;得到了粘钢加固钢筋混凝土轴心受压柱的承载能力计算公式,并由此建立了粘钢加固钢筋混凝土柱的极限状态方程,通过一次二阶矩法计算了由使用功能改变引起的粘钢加固柱的可靠度指标,计算结果表明按此极限状态方程设计的粘钢加固混凝土柱的可靠度满足《建筑结构可靠度设计统一标准》(GB50068—2001)的要求。
According to the stress-strain relationship and the ultimate strain of concrete assumed in “Code for Design of Concrete Structure” (GB50010-2002) and “Code for Design of Concrete Structure Reinforcement” (GB50367-2006), the limit conditions The formula for calculating the bearing capacity of reinforced concrete columns with bonded steel bars was obtained and the limit state equation of reinforced concrete columns with bonded steel was established. The viscosity of reinforced concrete columns with bonded steel bars was calculated by first order second moment method. The reliability index of steel reinforced columns shows that the reliability of the steel-bonded reinforced concrete columns designed according to this limit state equation satisfies the requirements of “Unified Design Standard for Reliability of Building Structures” (GB50068-2001).