陈映贞1,2,许肇峰1,2,王勇平1,2,鲁昌河3
高温(火灾)作用后混凝土残余强度统计分析
陈映贞1,2,许肇峰1,2,王勇平1,2,鲁昌河3
摘 要: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。
Abstract: The main influencing factors on the residual compressive strength and tensile strength of concrete after high temperature are analyzed. The statistical analysis on the residual strength of concrete under different cooling methods after fire is carried out, the mean value and standard value of residual compressive strength and tensile strength of concrete after fire are given, and fitting method is used to get the corresponding calculation model. The calculation model takes into account the effects of different cooling methods on the residual strength, and it is more suitable for the concrete bridge after fire. It can provide reference for the detection evaluation and reinforcement design of concrete bridge after fire.
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