Study On The Law Of Smoke Spread And Personnel Evacuation In The Fire Of Super High-Rise Building Under Construction

With the development of the construction industry and the continuous improvement of the construction technology of super high-rise buildings,more and more super high-rise buildings have emerged,but the following construction fire hazards and risks have also increased.As the super high-rise buildings have more floors,large size,complex functions,more materials and lines in the construction site,once the fire is ignited,it will cause unpredictable impact.In order to effectively control the influence of the fire of the super high-rise building under construction,this paper takes the fire of the super high-rise building under construction as the research object,uses the FDS software to carry on the dynamic simulation simulation and the personnel evacuation research,establishes the corresponding fire management measures,which has the important value to guide the fire department to carry out the fire fighting and rescue work.Based on this,this paper mainly does the following work:First of all,according to the process of fire,the characteristics of smoke and the analysis of the characteristics of fire,the theoretical basis of smoke spread in the fire of super high-rise building under construction is determined.Secondly,the numerical simulation of the fire spread on the building facade is carried out.According to the simulation results,the smoke spread law of the building facade fire and the change of the temperature of the building exterior wall and the air velocity at the fire source spread are obtained.Third,the influence of the form of building patio on the fire is analyzed.The open degree of the patio is an important factor affecting the spread of the building fire.According to the simulation results,the influence of the open degree of the patio on the smoke spread law,temperature,air flow direction,the height of the neutral plane and the distribution of air pressure is analyzed.Fourth,the building interior decoration fire simulation analysis.According to the simulation results,the curves of temperature,visibility and CO concentration of fire smoke are drawn,and the results show that the visibility of smoke has the greatest impact on fire,and the CO concentration is the smallest.Fifthly,simulate the evacuation of people in the building.Combined with the simulation results of smoke spread on evacuation and the judgment criteria of safe evacuation,the safety of evacuation in this fire scene is judged,and the corresponding fire management measures are proposed.