Numerical Study and Evaluation of Fire Damage on Sloped Steel Bridges and Analysis of the Protective Effect of Sprinkler Systems on Bridge Columns

This paper proposed a numerical simulation analysis of the problems in a bridge after a fire, and the problems were discussed to provide safety for the bridgework domain. The article used fire dynamic simulation (FDS) software for analysis. The investigation on the scene of a bridge fire and the detection of bridge damage caused by fire were described to discuss the effect on concrete and steel girder components. The effect of fire temperature and smoke at the scene of a fire were estimated to provide criteria for bridge fire prevention and enhancing bridge safety. This paper proposed using a sprinkler system to protect bridges against fire hazards and found out the reasonable flow rate to implement protection with minimum water quantity. For the characteristics of concrete fire damage, a fire-damaged reinforced concrete bridge inspection and evaluation method was introduced using an engineering example, and a bridge fire handling scheme was proposed. The method and idea could provide beneficial references for handling similar inclined bridge fires. A risk management evaluation method was planned and a numerical simulation model of a bridge fire was built, so as to provide criteria for improving bridge management safety.