室内悬浮颗粒物分布及输运特性的实验研究

采用大型有限元分析软件ANSYS，对深圳福田大型地下车站主体结构标准段的钢管混凝土柱顶 横纵梁、柱脚 底纵梁以及柱 地下1层梁等节点在梁端及柱端的弯矩、剪力和轴力等荷载作用下的力学性能进行模拟和分析.从钢管混凝土梁柱节点的受力状态出发，分析在梁端及柱端的弯矩、轴力和剪力等荷载作用下节点模型各组成构件（包括柱钢管、梁、加强环梁、承台、抗拔桩等部位）的主应力及切应力分布情况、变形情况和各个截面的内力分布情况等，与各个构件所对应的设计强度值进行对比分析，根据分析结果提出更合理的节点结构设计与加固方案.

Experimental study on distribution and transport of indoor aerosol particles

The transport and distribution of aerosol particles from outdoor environment to indoor environment were experimentally studied. A scaled two dimensional experimental setup was built to simulate the indoor and outdoor environment, the time dependent concentration of the particles from outdoor with a diameter distribution of 0.3 10.0 μm was measured inside the chamber to illustrate the influence of the particle diameter on the distribution and dispersion of the particles. The results show that the difference of the particle concentration is observed for different ventilation situations, because the flow field configuration effectively influences the particle dispersion at certain position in indoor environment. The particle diameter also influences the concentration distribution and the dispersion of the particles. The larger the particles, the lower the dispersion efficiency is. When the inflow air velocity is high, the difference of the particle concentration distribution among the particles with different diameters is very little. When there is no inflow gas at the inlets, the difference reaches the highest level.