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超高层建筑的发展推动着中庭结构的变革,超瘦高中庭应运而生。本文分析了现今中庭空间的几何特点,以烟气羽流上升过程中由轴对称羽流发展为四周受限羽流特征为判定依据,以理想羽流模型为基础,通过羽流半径的计算,确定超瘦高中庭的临界形状系数ξ=0.11;通过FDS仿真模拟建立中庭模型,对比不同形状系数的模拟与计算结果,分析了超瘦高中庭火灾烟气蔓延的速度、温度与扩散形式,确定超瘦高中庭形状系数范围是ξ<0.11,使超瘦高中庭作为一种独立的建筑形式被研究成为可能。
The development of high-rise buildings promotes the transformation of the atrium structure, ultra-thin high court came into being. In this paper, the geometric characteristics of atrium space are analyzed in this paper. Based on the ideal plume model and the calculation of the plume radius, The critical shape coefficient ξ = 0.11 of ultra-thin high atrium was determined. The atrium model was established by FDS simulation and compared with the simulation and calculation results of different shape coefficients. The velocity, temperature and diffusion pattern of smoke spread in atrium were analyzed. The shape factor range for the ultra-thin high atrium is ξ <0.11, making it possible to study the ultra-thin atrium as a separate architectural form.