Study And Design Of Enclosed Residential Streets Based On Thermal-Acoustic Environment In Severe Cold Area

As the basic building block of the city,the physical environment of street closely affects the comfort of pedestrians in the street and the environmental quality of neighborhood.As the winter in severe cold area is long and the outdoor environment is harsh,the outdoor activities of urban residents are rather inconvenient,so severe cold area have more urgent needs for the improvement of street environment.The purpose of this paper is to study the thermal-acoustic environment of typical residential streets in winter,compare and analyze the thermal-acoustic environment of residential streets which have different spatial patterns,and sum up the most suitable form of residential street adapted to the cold winter in severe cold cities.Firstly,this paper expounds the research status of street thermal environment and acoustic environment at home and abroad,and points out the limitation of existing researches.By summarizing the status quo of residential streets in severe cold cities,it points out the enclosed residential area is the most common form of residential area.Afterwards,this paper combines former research results with the main characteristics of street space in the enclosed residential area through a large number of field research,and finally selects street orientations,street aspect ratio and the continuity of facades as influence factors of street space form affecting thermal-acoustic environment,and determines their spatial scale.Field measurements,micro-climate simulation software ENVI-met and acoustic simulation software Odeon have been carried out in the study of enclosed residential streets,in order to discuss thermal-acoustic environment in streets which have different orientations,street aspect ratio and continuity of facades.The results show that street orientations,aspect ratio and continuity of facades have significant effects on the thermal-acoustic environment.Considering the quality of thermal-acoustic environmental in streets,better street orientation should be in the range of northwest 30 ° to northeast 30 °;ranging from 0.8 to 1.3,the lower the aspect ratio of streets is,the better the thermal-acoustic environmental is;at the same time,the change of facade continuity,namely whether there are notches and forms of notches,has a greater impact on street thermal-acoustic environment.Finally,this paper proposes related design strategy of streets and building spaces based on the thermo-acoustic environment by synthesizing the thermal-acoustic environment in streets with different spatial patterns.