Research On The Application Of Performance-based Fire Protection Design In High-rise Buildings

A large number of high-rise building construction,to a certain extent to solve the tension between human and land resources contradiction,but also increased the difficulty of building fire prevention design and fire fighting work.At present,China’s building fire prevention regulations and means,often only applicable to some types of buildings,can not scientifically solve the function of complex high-rise building fire design problems.Based on the numerical simulation analysis of the fire scene,this thesis studies the application of performance-based fire prevention design in high-rise buildings,which has important theoretical and practical value.The research content of the thesis is divided into five parts:（1）on the basis of the development of high-rise buildings,the characteristics of fire and disaster analysis,the thesisr discusses the research status of performance-based fire design at home and abroad,in order to clarify the research content of the thesis,determine the research framework of the thesis;（2）The content and concept of performance-based design are summarized,including the basic content and main steps of performance-based design and safety evacuation design theory,and the differences between performance-based design and standard design are elaborated;（3）The influences of evacuation,heat release rate,smoke diffusion and fire scene on performance-based fire prevention design of high-rise buildings are discussed.（4）using Pyrosim software modeling analysis,by using fire dynamics software FDS to obtain multiple computing clouds,such as the fire smoke flow,the distribution of poisonous and harmful gas in the fire,the temperature changes in the fire,etc,and then according to the results of the diffusion simulation for performance-based fire protection design of high-rise building.（5）Using the method of questionnaire survey,through the investigation and analysis of a unit high-rise residential building,clear the shortcomings of the existing fire prevention design.The research conclusions of this thesis mainly include:（1）based on the analysis and summary of the performance-based fire-protection design research status at home and abroad,the research is not enough in-depth of the performance-based fire-protection design,especially the lack of application of performance-based fire protection design in high-rise buildings,in this article,through the method of numerical simulation analysis,studies the application of performance-based fire protection design at a high level,has a good prospective.（2）Combined with the characteristics and laws of fire safety evacuation path,fire combustion process,fire smoke flow,etc,the simulation research on the fire scene of high-rise buildings can get the corridor route conducive to the safe evacuation of personnel.（3）The smoke spreading speed of stairwell is related to chimney effect.The smoke spreading speed of stairwell is faster than that of enclosed corridor.The smoke spreading rate of stairwell is very high after 400 seconds of fire,and the smoke spreading speed of stairwell can reach 1.5m/s at the fastest.