가압 계단실의 방연풍속 형성에 대한 수치해석적 분석

Abstract

In high-rise commercial buildings, the smoke that occurs in case of a fire tends to be spread rapidly to the horizontal and vertical direction due to the structural characteristics of the buildings. In particular, since the smoke spread to evacuation stairwells and elevator shafts results in the toll of lives, Design Guidelines for Smoke Control System of Special Evacuation Stairwell and Lobby of NFSC 501A was proposed in Korea as one of fire safety standards to prevent the penetration of the smoke into the above mentioned areas. Towards this end, the vestibule pressurization method was largely used in the past, but the stairwell pressurization method is introducing in recent years. This study attempted to analyze whether air egress velocity suitable for the standards is secured, targeting the actual buildings designed with stairwell pressurization system through numerical analysis. For this, a real-size model for numerical analysis was made by measuring the floor plan, airflow, pressure and flow area of any floor in a fire, and velocity to prevent smoke backflow was analyzed.