Emergency evacuation in subway station based on Combined Social Force Model

With increasing occurrence of large-scale and half-closed traffic hubs like subway stations, more and more attention has been paid to emergency evacuation inside them. Based on Social Force Model, add a gas dispersion model into simulation environment. A Combined Social Force Model was built which is suitable to a real situation where there is a sudden toxic gas event. The improved evacuation model optimizes primary Social Force Model by taking into account the cohesion among passengers and the nervousness factor in emergency. The model integrates Gaussian Puff Model and can reflect the process of evacuation accurately. At last a corresponding simulation experiment was conducted and emphasizes the importance of gas positions and detecting emergency in time to efficient evacuation.