Abstract
In order to provide reasonable advice for the maintenance and reinforcement of Bridges after fire, it is necessary to assess the damage of Bridges after fire. In this paper, the damage area of a fire-damaged concrete highway bridge is divided according to the concrete apparent detection, and the damage degree of different parts is determined. Carbonization depth and springback detection were used to determine the area and depth affected by fire. Based on the analysis of the surface fire temperature of components in different areas and the internal temperature of concrete, the degradation of the mechanical properties of concrete and steel bars is further deduced, and the damage assessment of the bridge performance is finally carried out.
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