随着社会的发展，我国超高层建筑数量已经步入世界前列，然而超高层建筑火灾引起的安全问题则成为困扰人们的难题，尤其是灾时被困建筑内的人员能否及时疏散，更是国内外众多学者关注的焦点之一。本文以西安绿地中心超高层建筑为背景，运用理论分析、计算机模拟和模糊评价等方法对火灾发生后人员的疏散安全性进行了研究。 本文采用先部分后整体的研究思路，对超高层建筑火灾烟气扩散和人员疏散安全性进行了系统性研究。首先以某超高层建筑具有代表性的两个区域作为研究对象，设计了四种不同工况条件下的火灾场景，使用FDS模拟软件进行模拟，得出了不同火灾场景下火灾烟气蔓延的一般规律。其次，从人的行为和物的不安全状态以及火灾特性的角度出发，结合超高层建筑的特点分析发生火灾时，影响火场中人员安全疏散的关键因素，建立了人员安全逃生行为模式图，计算出不同工况条件下人员安全疏散可用时间（ASET）和安全疏散所需时间（RSET），并对人员疏散安全性进行分析。最后，通过分析超高层建筑结构及消防系统，提出了超高层建筑火灾风险评价指标体系，基于模糊层次分析法，建立了超高层建筑火灾疏散评价模型，并采用该模型对工程实例进行了评估，结果表明该模型可适用于不同建筑结构特点的超高层建筑，并针对该超高层建筑实际情况，提出几条改进措施及建议，确保灾时该超高层建筑火灾疏散系统安全、有效。 超高层建筑火灾发生后人员疏散不及时导致伤亡事故频有发生，故有必要对超高层建筑火灾蔓延规律及影响人员安全疏散的因素进行研究。本课题的研究对保障人员生命和财产安全方面有很多指导性的意义，同时也为超高层建筑的防火设计、建筑内部应急疏散体系以及消防人员灭火救援提供重要参考价值。

With the development of the society, the number of super high-rise buildings in our country has stepped into the forefront of the times, however, its safety problems caused by the fire plagued people, especially after the fire, people's timely, efficient and safe evacuation were attracting widespread attention from many scholars at home and abroad.Taking the super high-rise building of Xi'an Green Space Center as the background, this paper maked a field survey on the characteristics of a number of super high rise buildings, and studied the evacuation safety of the personnel after the fire by using the methods of theoretical analysis, computer simulation and fuzzy evaluation. Based on research idea of The overall after the first part, this paper systematically studied the evacuation safety of super high-rise building under fire.Firstly, two representative areas of a super high-rise building were taken as the research object, and the fire scene under four different conditions was designed. The law of fire smoke spread under different scenes was obtained and the safety evacuation time (ASET) of personnel was calculated under each condition by using FDS simulation software. Secondly, from the point of human behavior, the unsafe state of objects and the characteristics of fire, the key factors that affected the safety evacuation of people in the fire field were analyzed in the light of the characteristics of the super high-rise buildings, and the pattern of the safety escape behavior was set up, and the time required for safety dispersion (RSET) was calculated. Thirdly, through the analysis of the super high-rise building structure and fire control system, the fire risk evaluation index system of super high-rise buildings was put forward. Based on the fuzzy analytic hierarchy process, a fire evacuation evaluation model for super high-rise buildings was established, and the model was used to evaluate the engineering examples. The results showed that the model could be applied to the super high-rise buildings with different architectural features. Finally, according to the law of fire generation and spread development of super high-rise buildings, combined with the relevant standards of GB50045-95 (2006) of the fire protection code for high-rise civil buildings, the method of prolonging ASET and shortening RSET was put forward to ensure the safe evacuation of the personnel after the fire. It was necessary to study the laws of fire spread and the factors affecting the safety evacuation of super high-rise buildings. The research of this subject had a lot of guiding significance for the safety of people's life and property, and also provided an important reference value for the fire protection design of super high-rise buildings, the system of emergency evacuation in the building and the fire fighting and rescuing of the firefighters.