In recent years, urban construction more and more high, high-rise building fire is also emerge in endlessly, and intensified. The update of the hardware of the fire is miss floor height increases, the speed of the high-rise building after the fire, the existing fire equipment is difficult to accurately on the fire extinguishing, causing the fire spread further relief difficulty increasing, casualties and property loss is also on the rise, high-rise building fire prevention and control has become a social problem.

1, the fire safety analysis factors

Various factors affecting the safety of large building fire, on the safety analysis not only by professional personnel's subjective judgment, but need to using the hierarchical analysis method analysis principle, solve the structure of large construction specialization, diversification and complication of equipment use of complicated problems in fire safety design. By professional personnel's subjective judgment into mathematical form of expression, mathematical quantitative processing, decision analysis provides quantitative standards, improving the effectiveness and reliability of the decision. But no matter how in the assessment of large buildings for fire safety factors still need to follow the operability, independence, and leading the three principles. According to the existing norms and standards, and large public buildings fire characteristics both at home and abroad, the influencing factors of large public buildings on fire control safety by building their own situation, building fire control facilities and fire three aspects daily management, so the large public buildings fire security assessment factors can be divided into: the classification of the building itself, building materials, refractory grade requirements, overall layout, three-dimensional layout and plane layout, fire smoke partitions of building structure, safety evacuation passageway and fire hydrant system, automatic sprinkler system, smoke control and extraction systems, automatic alarm system, fire elevator, fire emergency lighting and evacuation indicating signs, fire unit management system, staff skills, staff attitude, people's consciousness of fire safety, fire control facilities maintenance level and so on a series of factors.

2, the fire safety analysis methods

The evaluation of large construction is a collection analysis of various factors of multi-level comprehensive evaluation. There are a lot of common fire safety assessment method, classification is very complex, according to the different structure forms can be divided into experience system analysis method, logic analysis, system analysis, computer simulation of fire analysis, human error analysis, etc. Represented by technology of computer simulation analysis, for example, it is by means of computer simulating the fire model, analyze the process of the occurrence and development of fire, through establishing reasonable model, quantitative comparison can definitely different fire scheme of fire risk. By comparison, according to the different characteristics of each building choose the most suitable fire control scheme.

According to the results and can be divided into quantitative and qualitative analysis method. Qualitative fire safety assessment method is a way to appear more early, mainly safety checklist and fault tree analysis method. Qualitative analysis is of development than a rapid analysis method in recent years, mainly include deterministic analysis, comparative analysis and probability risk analysis. The former is mainly based on past experience, intuitive judgment ability and management situation of qualitative analysis, the analysis of security evaluation results are some qualitative indexes, such as whether a certain measures reached a safe index. Qualitative characteristics of safety evaluation method is easy to understand, easy to master, simple evaluation process. The qualitative fire safety assessment method at home and abroad enterprises are widely used in the fire safety management. Qualitative fire safety assessment methods often rely on the experience, the evaluation process is simple, has great limitations. And fire safety evaluation results by attending the evaluation personnel's experience and the experience is different, the same building safety evaluation has considerable differences, unable to form a professional and authoritative rules, different people different degree of recognition. Safety evaluation results can not give a specific quantitative type of risk, so the safety evaluation result lack of comparability between different types of objects.

Quantitative methods to evaluate the fire safety are based on a large number of experimental results and for a wide range of indicators of accident data statistical analysis, rule, or mathematical model, produce a kind of the result of the fire safety assessment is a certain amount of indicators, such as the probability of accident, accident loss, accident harm scope, the risk of accidents, cause of accident and so on.

Beijing branch into the dragon control system co., LTD is specialized in high-tech product development, production and sales and service of high-tech enterprises, is China's security product industry association, deputy director of the unit, vice President of China association of fire units, China fire protection association director unit, passed the ISO9001 quality management system certification unit, a number of national and local relevant technical specifications and product standard of the ginseng units.

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