根据GB 50010-2010《混凝土结构设计规范》的刚度计算公式,建立了混凝土梁抗弯刚度的多维非线性极限状态方程。基于随机参数统计分布,构建了梁失效模式下的抗弯刚度可靠性模型,分别应用中心点法、JC法和Monte Carlo法计算梁的可靠度。计算结果表明,所建立的可靠性模型揭示了钢筋混凝土梁在各种随机因素作用下刚度失效的规律,为钢筋混凝土梁的刚度可靠度分析提供了理论依据。 According to the stiffness calculation formula of GB50010-2010 “Code for design of concrete structure”, the multi-dimensional nonlinear state of state equation of bending stiffness of concrete beam is established. Based on the statistical distribution of random parameters, the reliability model of beam bending stiffness under beam failure mode was constructed. The reliability of beam was calculated by the method of center point, JC method and Monte Carlo method respectively. The calculation results show that the established reliability model reveals the failure of reinforced concrete beams under various random factors and provides a theoretical basis for the stiffness reliability analysis of reinforced concrete beams.