Based on the theory in physics about the influence mode of disaster to city regional system and theory of field,the new conception of disaster field is defined.

Aiming at the characteristics of big risk,high time-effect and rapid occasion-determine in emergency command decision-making on disaster scene,Gradewise and Stepwise Decision-Making Modes were studied and put forward for a demand of short time,high efficiency and flexible determine.

The verification principle and method of fire scenario;

Research on hypothesis system of fire scenario;

Preliminary study on fire scenario s design of subway fires;

Simulates the fire scene and adopts the concept of quasi-outdoor space.

By setting different fire scenes including the most disadvantageous condition and numerically simulating the movement of fire smoke and personnel evacuation,the curves of available safe egress time(ASET) and the required safe egress time(REST) are obtained for each fire scene in th.

Analysis the characteristic of the tunnel fires, introduces a common method to the safe evacuation design of tunnel, enactments fire scene.

Analysis of bending capability of a reinforced concrete beam supported at both ends in fired field;

Design of square for disaster prevention in urban underground commercial space;