Investigation And Research On Somatosensory Comfort Of Urban Street Environment In Beijing

With the increasing quality of life,people pay more attention to the environmental quality of urban public space.The microclimate problem has been the focus of attention.Streets are essential public Spaces for urban residents.Creating healthy and comfortable microclimate environment is an important way to enhance the utilization rate of street space.At the same time,it also plays an important role in improving urban climate problems and promoting urban development.This study takes several representative urban streets in Beijing as the research object.(1)Establish the street classification standard;(2)In autumn and winter,collected and analyze the data of climate factors such as air temperature,relative humidity,wind speed and solar radiation.Summarize the impact of environmental factors on the thermal environment of the streets.(3)Investigate and analyze users'physical comfort factors.Rayman software is used to calculate and analyze the PET value of the thermal comfort index of each type of street,and evaluate the thermal sensation and thermal comfort of each type of street.(4)Based on the improvement conditions of thermal comfort,To propose strategies and suggestions for improving the existing urban street space.In this study,the streets are divided into six types:commercial streets,business streets,industrial parks streets,life-service streets,landscape streets and characteristic streets.The temperature of each type of street varies from-1?to11?in winter and from 22?to29?in autumn.The street humidity is mostly distributed in 20%-40%in winter and in 15%-30%in autumn.The wind speed is small overall.In winter,most solar radiation values are distributed in the range of 0?200W/m~2.In autumn,the values are more distributed in the two ranges of 0-200W/m~2and 800-1000W/m~2.The thermal comfort evaluation of all types of streets in winter is"uncomfortable".In autumn,the thermal comfort of the streets in the industrial park is evaluated as"uncomfortable",the streets with historical and cultural characteristics as"comfortable",and the rest of the streets are rated as"moderate".The direction,the ratio of street height to width,the continuity of interface and the greening degree can regulate the change of sunshine degree of pedestrian area in the street,and have the greatest influence on the microclimate.Street scale,greening scale and interface properties affect the psychological feelings of pedestrians to some extent.In the street optimization strategy based on the thermal comfort environment of microclimate are as follows:reasonable allocation of green planting,appropriate addition of structures and water bodies.