Abstract:

Pathfinder is used to study occupant evacuation in a high-rise building. Firstly, evacuation only by staircase or elevator was simulated, and then a study on the stair- elevator joint evacuation including top-level priority evacuation and refuge floor modes was carried out, and the two joint evacuation strategies were further optimized using different personnel diversion methods. The results show that under the top-level priority evacuation strategy, the best separation floor will decrease with the decrease of the number of people on each floor; under the toplevel priority evacuation, the empty load of the elevator can be reduced after the optimization of personnel diversion; as the refuge layer mode adopts the method of diversion of people, the proportion of people can be reasonably allocated in the middle and high floors according to the actual situation without affecting the evacuation efficiency.

Key words:  fire protection, high-rise building, Pathfinder simulation, joint evacuation