Safety Prediction Using Vehicle Safety Evaluation Model Passing on Long-Span Bridge with Fully Connected Neural Network

Abstract

The safety condition of vehicles passing on long-span bridges has attracted more and more attention in recent years. Many researchstudieshavebeendonetofindconvenienceandefficiencymeasures.Avehiclesafetyevaluationmodelpassingonalongspanbridgeispresentedinthispaperbasedonfullyconnectedneuralnetwork(FCN).Thefirststepistoinvestigatethelong-span bridgeresponseswithwindexcitationbyusingthewindtunneltestandfiniteelementmodel.Subsequently,typicalvehiclemodels are given and a vehicle-bridge system is established by considering weather conditions. Accident types of vehicles with severe weather are estimated. In particular, the input and output variables of the vehicle safety evaluation model are determined, and simultaneously training, validation, and testing data are achieved. Twenty-nine models have been compared and analyzed by using hidden layer, initial learning rate, batch size, activation function, and optimization method. It is found that the 4-15-15-4 model occupies a preferable prediction performance, and it can provide a kind of utility for traffic control and reduce the probability of vehicle accidents on the bridge.