Detection, evaluation and reparation of fire damaged simple-supported beam bridge

This paper introduces the testing of a fire-damaged simple-supported beam bridge. Through the methods such as melting points of materials and component surface color judgment, the temperature field of the damaged bridge is obtained. Referring to the standard temperature-rise curve of ISO, the temperature field of the bridge is analyzed by the finite difference method and finite element software ANSYS. According to this analysis, the structure component size and the mechanical properties of materials are evaluated, and then bearing capacity and durability of the bridge are assessed comprehensively. On the basis of this work, reinforcing solutions for different components are designed. New material (waterborne epoxy) and new technology (suspended formwork extrusion process) are used during the construction. The detection and experimental analysis of the reinforced bridge show that the reinforcement achieved good effects. These ideas can provide beneficial references for bridge fire-resistant design and processing of similar diseased bridges.