Study Of Performance-based Design For The Fire Safety Of One Building Engineering

In the recent years, many kinds of architectures are coming forth as the economy develops fast and land resource is increasingly hard up in the city. The emergence of these new-style buildings has dramatically changed the face of the city and enhanced the use of the building features, simultaneity, the new-style buildings are also becoming a great challenge to the current fire safety design specifications, and many more new questions are raised to the building fire safety. Especially, with frequent incidents of high-rise building fires in recent years, fire caused massive property damage and casualties due to the special nature of high-rise buildings, so the fire safety of tall buildings should be increasingly attracted attention in the society. The traditional design method of fire prevention is mainly designed in accordance with the current standard, known as "prescriptive" design specifications. The fire Safety Code design conducted by the "prescriptive" already has some limitations in the modern building fire protection design engineering, in order to reduce fire risks, we often use a more secure and rational new building fire safety design method, performance-based fire Design Method (Performance-based Fire Safety Design Method) analyzes the works of construction to verify the rationality and safety of fire protection design.In this paper, we use the fire experiments, computer simulation and other fire safety engineering methods and techniques to analyze and evaluate the main fire problems which exist in the atrium smoke extraction system and the roof helipad set of the high-rise building. According to the actual situation of this building, setting performance-based fire safety design of its main security objectives: under the conditions in the fire, smoke exhaust system which is set in the court of mechanical can work efficiently; fire can be controlled in setting the fire area; people inside of the building are able to evacuate safely. To verify whether the fire protection design for building fire safety can achieve the above objectives, this paper utilizes the fire safety engineering methods to analyze that one by one.The evacuation simulation software Pathfinders is used for the evacuation scenario analysis, the safe evacuation of staff time calculated in all kinds of scenarios is for judging the effectiveness of atrium smoke extraction system and providing a reference; hydraulic model is used to calculate the evacuation of staff time, personnel in the process of the evacuation is conducted by uncertainty analysis. we analyze the uncertainty of the spread of fire, use of the fire development of analytical tools to set the corresponding fire scenario and simulating motion law of flue gas, use the fire dynamics simulation software FDS (Fire Dynamics Simulator) which is commonly used in fire safety engineering to simulate the fire smoke movement which the fire scenario has been identified, and to determine whether the fire separation designed could control a fire in the set area ; in the end, do simulation analysis on the Atrium exhaust performance and determine the mechanical makeup air courtyard setting is feasible.In addition, because of the building Block A tower can not set the roof helipad and does not meet the specification requirements, so we analyze the feasibility of the building with no roof helipad and raise the appropriate alternative measures such as setting a helicopter emergency rescue space. Through comprehensive analysis and reasonable safeguards, ultimately the issues in the exhaust system and roof apron set up are been reasonably solved under the premise of using the construction features.