Research On The Form Design Of Commercial District Building Group In The Severe Cold Region Based On Outdoor Thermal Comfort

With the rapid development of urbanization,the heat island effect,local weather city health problems appeared,such as how to build a comfortable urban public space has become the problem of the concern of scholars at present,the commercial block of outdoor thermal environment design to improve the quality of urban space and promote regional economic development is of great significance.At the same time,with the development of computational design concept and parametric modeling technology,performance simulation is gradually involved in the decision making of architectural group form design.This article from the perspective of commercial block groups form design,to improve the outdoor thermal comfort level for design goal,by the year’s season of outdo or physical environment test results and a lot of subjective questionnaire survey data and mathematical analysis,the end of the clear different seasonal fluctuation trend of outdoor environment,the residents’ perception of outdoor environment situation and the degree of preference of meteorological parameters,combined with the research methods to correct the scientific index,and exploration of several quantitative conclusion,to provide accurate data and conclusion for formulating the design strategy of commercial block in cold region.In this paper,the basic concept,development trend,design bottleneck and other aspects of the cold commercial block were firstly expounded.Combined with the theoretical basis of outdoor thermal environment,the reasonab le quantitative index of the composition and geometric form of the cold commercial block was proposed.In the field of integrated analysis of outdoor thermal environ ment and the theoretical basis of evaluation index,the universal thermal climate index UTC I was proposed as the quantitative index in this paper.Research of Harbin commercial block each season for outdoor physical environment test and subjective questionnaire survey,a large number of cold for the outdoor thermal environment and residents’ subjective demand analysis,qualitative and quantitative to cold to commercial blocks to evaluate outdoor thermal comfort level,to scientific correction of UTCI original scale,at the same time explore residents outdoor solar radiation and wind the coupling effect of thermal sensation,provide a reference for the cold outdoor thermal environment design.Finally,based on the information investigation and analysis result s of commercial blocks in the cold region,an example of a commercial block conforming to the research scope of this paper was selected and an abstract model was constructed through Rhinoceros and Grasshopper parameterized modeling platform.A parametric geometric model was constructed from the three levels of overall layout scale,building group layout and street space scale.Through parametric heat simulation software,the control variable experiment is carried out,and combined with the obtained quantitative conclusions of outdoor thermal comfort in cold areas,the simulation results are screened and discussed reasonably,so as to put forward a reasonable design strategy of building group form.