混凝土冻融损伤可靠度分析及剩余寿命预测

本文基于宏观损伤力学理论，分析混凝土冻融损伤的可靠性，把混凝土结构冻融损伤近似看作由不同正负峰值温度差顺序作用产生的，提出了三参数Weibull损伤可靠度分析模型，并在混凝土损伤等效的基础上，推导出冻融循环作用后混凝土剩余寿命计算公式。结合混凝土冻融的定量化分析，得出了在遭受一定的冻融损伤后混凝土结构的剩余工作年限。

Analysis on reliability of concrete under freezing-thawing action and evaluation of residual life

Based on the theory of macro-damage mechanics, the damage of concrete structures under the action of freezing and thawing may be approximately regarded as the damage due to sequential cyclic action with various positive-negative peak temperature differences, since the temperature difference is always not a constant. On this basis, the reliability of damaged concrete is analyzed. The failure of concrete can be described by the Weibull distribution model. Thereby, a model with 3 parameters for analyzing the reliability of concrete is proposed and the formula for evaluating the residual life of concrete after the freezing-thawing action is deduced.