Research On Approaches For The Fire Safety Of Large Commercial

As the whole society economy and science and technology swift and violent development,our country has become a global economic power,and in many industries and fields have also made a certain progress.In addition,various forms of new commercial buildings are constantly being created,compared with the past of commercial buildings,the size of the new building is bigger,and various functions.However along with the progress and development,various social problems begin to emerge,the fire is one of them.Because modern commercial buildings have more functions,and the characteristics of the large scale,to make the fire prevention and safe evacuation design is more difficult,the current our country existing related design has gradually began to can't meet the requirement in the new era and the environment,and performance-based fire protection design method can well solve the problem.This paper summarizes the current research status of the performance-based fire-protection design around the world,the general steps of the performance-based fire protection design is expounded.A large commercial building fire system design in shenyang as an example,illustrates how to differentiate fire partition,smoke partitions,computational evacuation channel width.This engineering construction and control principle of the smoke control system and smoke control measures are summarized,gives the burden of the exhaust smoke partitions equipment choice model.Using the fire dynamics simulation software FDS,fireproof partition to the metro engineering examples,the third floor building fire simulation model of numerical simulation,analyzes the five kinds of mechanical ventilation conditions near the fire source and the evacuation passageway of the temperature field and concentration field.Analysis under the simulated condition of 60 m3/(h.m2)amount of smoke,can achieve better control effect of fire smoke.And smoke near escape stair mouth appropriate chooses 90 m3/(h.m2),the amount of smoke,can better control the rise of temperature of the area is conducive to escape.In 60 m3/(h.m2)exhaust quantity conditions,further smokview software analysis smoke hanging wall of flue gas velocity and the influence of the temperature field in space.Can get mall smoke hanging wall in the corridor of the upstream section of smoke storage pool formation,thus improve the efficiency of smoke.On the other hand,can reduce the flue gas to the spread of smoke hanging wall downstream.Temperature significantly higher than other areas of the region at the same time,enhancing the working efficiency of the sense of temperature probe and discharged in time the further delay spread of the flue gas of high temperature flue gas velocity.Finally the difficult for large shopping mall building fire protection design are analyzed,and the business environment in fire prevention design strategy and concrete measures are put forward,at the same time,summarized the application of new technology of fire control and management,to provide some reference for project practices.