火灾后的损伤桥梁检测与有限元仿真分析

Inspection and Finite Element Analysis of Damaged Bridge after Fire Accident

以杭瑞高速吉怀段受火连续梁桥火灾后的检测评估工作为例,依据现有规范,对受火后桥梁的外观损伤以及混凝土强度、钢筋抗拉强度、伸缩缝缝宽等进行了专项检测,结合有限元建模分析了桥梁的剩余承载力以及受力变化,对受火后桥梁上部结构损伤状况作出科学评估,为下一步桥梁的维修加固提供可靠参考。

This paper takes the inspection and evaluation of a continuous girder bridge after fire as an example,based on the existing specifications,special inspections are carried out on the appearance damage of the bridge after the fire,as well as the concrete strength,steel tensile strength,expansion joint width,etc.The Finite Element Modeling analyzes the residual bearing capacity and stress changes of the bridge,makes a scientific assessment of the damage of the bridge superstructure after the fire,and provides a reliable reference for the next step of bridge maintenance and reinforcement.