| Under the background of globalization,urban construction has developed rapidly,and urban blocks have gradually shown a trend of high density,which has promoted the change of urban form and further affected urban climate change.At the same time,in the cold climate conditions,high-density commercial districts face more environmental,climate and energy consumption problems than other areas of the city.At present,planners and architects seldom consider the impact of planning and design on the outdoor thermal environment of the block in the design stage.The outdoor thermal environment of high-density commercial district in cold region is taken as the research object.From the four aspects of ’ problem exploration-analysis and extraction-research and solution-practical application ’,the outdoor thermal environment prediction model of high-density commercial district under cold climate conditions is constructed,and the design strategy of high-density commercial district in cold region based on outdoor thermal environment improvement is proposed.Firstly,under the background of highly intensive utilization of urban resources,high density is the future development of the city.On the basis of combing past research,this paper puts forward the importance of building outdoor thermal environment prediction model of high density commercial district in cold region,and lays the foundation for later research.Secondly,this paper analyzes and discusses the definition and morphological characteristics of high-density commercial districts under severe cold climate conditions,and then puts forward reasonable morphological elements of high-density commercial districts in cold regions.Combined with the theoretical basis of outdoor thermal environment,the theoretical basis of the prediction model in this paper is CTTC model,and the evaluation indexes are UHII and UTCI.Thirdly,the outdoor thermal environment of two high-density commercial streets in Harbin was tested,and the applicability of CTTC model in high-density commercial streets in cold regions was verified.The outdoor thermal environment prediction model is constructed based on RH & GH platform.Finally,combined with the investigation results of high-density commercial streets in cold regions,the initial design model in line with the scope of this study is constructed.Multiple simulation conditions are established from the overall scale of the block,the horizontal level of the building group and the vertical level of the building group,and the constructed outdoor thermal environment prediction model is used for simulation.Through the discussion and analysis of the simulation results,the reasonable design strategy of high-density commercial district in cold region is put forward. |
