火灾后混凝土桥梁检测评估分析

Analysis on detection and evaluation of concrete bridge after fire

介绍火灾后混凝土桥梁检测评估体系,包括火场踏勘、结构损伤详细调查、详细检测以及检测结果的综合性评估等多个阶段。重点说明该体系中各阶段的检测方法,包括经典升温曲线火灾温度推定分析法、火灾现场物质形态调查推定法、混凝土表观损伤推定分析法、芯样抗压强度推定分析法等。工程实例应用结果表明:该体系对火灾后混凝土桥梁温度分布、损伤范围、深度等多个方面进行了分析,内容详实,且各方面相互论证,具有较高的可靠性。

The detection and evaluation system of concrete bridge after fire was introduced,which include fire scene investigation,detailed structural damage investigation,specialized detection and comprehensive evaluation.The detecting methods of each stage of the system were focused on,including fire temperature presumption by classic temperature rise curve,fire scene material investigation and presumption,concrete apparent damage presumption,and core sample compressive strength presumption.The application on the engineering showed that,the temperature distribution,damage range,depth and other aspects of the concrete bridge after fire were analyzed in details,and each aspect were compared with each other,and the system was highly reliabile.