Smoke Control In The Case Of Performance Based Design For An Underground Commercial Street

Underground commercial building plays an important role, with the exploiting and using of underground spaces. The fire load of underground commercial building is very large and controlling fire is difficult. Underground building with its closed, exits lacked, the people density being large, the flow direction of smoke and the spread direction of fire are consistent in the evacuation routes. Fires in the underground building are much danger than over ground building. The hazards of smoke are especially strict in underground building, so smoke control in the underground building has becoming the focus.The importance of fire hazard and smoke control are presented in the thesis; design for fire protection of underground Commercial Street in our country is introduced. The present research of smoke movement and smoke control at home and broad is summed up. The numerical simulation of smoke control is also discussed in this thesis. This thesis discusses the Performance-based Fire Protection Design, the basic knowledge of smoke control and theoretic basis on smoke simulation. This thesis analyses smoke movement and smoke control in two fire protection district including a night club and a street district in an underground commercial street in Chongqing, with its areas of the fire protection and smoke district exceed the code, using CFD software PHOENICS and FDS program which is implored by NIST.Analysis result of simulation shows: underground commercial streets and atrium can use natural filling. In the actual engineering, mechanical smoke exhaust system is used by the local fire department added. The night club uses a set of mechanical smoke exhaust system, and the quantity of supply air can't be less than 50 percent of the exhaust.Performance-based analysis and the experiment method can be used to make fire protection design for building which can't measure up the Prescriptive Fire Protection Design Code. The research in this paper gives some ideas and reference for the fire protection design of building like this.