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分析了混凝土高温后残余抗压和抗拉强度的影响因素,对不同冷却方式下混凝土残余强度进行统计分析,给出了混凝土高温后残余抗压和抗拉强度均值和标准值,并拟合得到相应的计算分析模型。该计算模型充分考虑了不同冷却方式对残余强度的影响,更符合桥梁火灾后混凝土的实际状况,可为火灾后混凝土桥梁的检测评估和加固设计提供参考。
The influencing factors of residual compressive strength and tensile strength of concrete after high temperature were analyzed. The residual strength of concrete under different cooling modes was statistically analyzed. The mean and standard values of residual compressive strength and tensile strength of concrete after high temperature were obtained. The corresponding calculation and analysis model. The calculation model fully considers the influence of different cooling modes on the residual strength, and is more in line with the actual condition of the concrete after the bridge fire. It can provide a reference for the testing, assessment and reinforcement design of concrete bridges after fire.