The invention discloses a regional
traffic network dynamic
risk assessment method under sudden earthquake influence, which belongs to the technical field of
earthquake disaster assessment and comprises the steps of collecting data and preprocessing, constructing a
traffic network model, constructing an earthquake
vulnerability model and constructing a risk
dynamic assessment system. According to the method, seismic parameters, social economy, a regional
traffic network and real-time detection data after an earthquake are comprehensively considered when the earthquake occurs, the risk of the regional traffic network under the earthquake can be evaluated more comprehensively, a Monte Carlo
simulation method is applied, an earthquake
vulnerability model is combined, a damage scene of the earthquake to the traffic network is simulated, and the risk of the regional traffic network under the earthquake can be evaluated more comprehensively. Evaluating the damage probability and the function loss of the traffic facilities; calculating the
connectivity of the traffic
network model, and dynamically calculating the performance change of the traffic network after the earthquake based on the
connectivity index and weight of the traffic network; and evaluating the
toughness of the traffic network according to a
network performance recovery curve under the
recovery strategy, so that the performance change of the traffic network in the earthquake can be dynamically reflected in real time.