單面受火預(yù)制復(fù)合保溫墻體抗火性能和設(shè)計方法研究
[Abstract]:With the development of society, the concentration of urban population is higher and higher, and high-rise buildings are more and more popular. Rapid development also brings many problems. The increasing number of building fires has become an important issue affecting urban safety. Social development also brings the consumption of resources, reduce building energy consumption and achieve sustainable development. Therefore, it is necessary to pay attention to energy saving and resist the influence of man-made and natural fire. It is the trend of industry to study the wall which has the function of heat preservation and heat insulation as well as the function of firewall. The thermal insulation performance and fire resistance of four prefabricated composite insulation walls are analyzed in this paper. Firstly, the requirement of heat preservation performance of energy-saving wall in hot summer and cold winter area is studied, and it is verified that the wall has good thermal insulation performance. Secondly, the fire resistance of prefabricated composite insulation wall is studied by fire test, and the temperature field and deformation of the wall under fire are also studied. Through finite element analysis, the influence of thermal insulation material type, thickness of insulation material layer and axial compression on the fire resistance of wall is discussed. The above analysis shows that the four prefabricated composite insulation walls made in this paper can meet the thermal insulation performance requirements of energy-saving and thermal insulation wall in hot summer and cold winter area; The effects of different insulation materials on wall thermal insulation and fire resistance are different. EPS and XPS insulation materials have similar effects on wall thermal insulation and fire resistance, and rock wool insulation materials have great improvement on wall fire resistance. The thickness of different insulating material layer has great influence on the thermal insulation performance and fire resistance of the wall, and the appropriate thickness of the insulating material layer is the best to improve the thermal insulation and fire resistance of the wall. Axial compression ratio has a certain effect on the deflection of the wall, but the smaller the axial compression ratio is, the smaller the out-of-plane deflection of the wall is, the more appropriate the axial compression ratio is, the lower the out-of-plane deflection of the wall is under fire. By means of finite element software, the temperature field of prefabricated composite insulation wall under fire is compared and analyzed. It is found that the model adopted in this paper is in good agreement with the experimental results, and the error lies in not taking into account the influence of water vapor and exhaust hole on the wall. Then the wall model of different thickness insulation material layer is established. The influence of different thickness insulation layer on the fire resistance of the wall is studied, and the temperature-distance curves and formulas of three different insulating materials are obtained at different thickness of the wall. The temperature-thickness formula and curve of different wall temperature field at the same position are summarized and summarized. The method of improving the fire resistance of prefabricated composite insulation wall is put forward, and the construction measures are put forward to improve the fire resistance of the wall.
【學(xué)位授予單位】:東南大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TU761.12
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