Study On The Outdoor Wind Environment Of Pedestrian Height Of Bottom Overhead Buildings In Qingdao

In recent years,exterior air quality is reducing and people's living environment is getting worse with the development of urbanization and the growth of population in Qingdao.Bad wind environment has become another factor affecting the outdoor environment in addition to building light pollution,noise pollution and waste water pollution.Outdoor wind environment can affect the human comfort,and it can also influence the fresh degree of the outdoor air.In addition,outdoor wind environment can affect the indoor wind environment,and it can also affect the indoor air conditioning in summer and winter heating.So the outdoor wind environment can affect the energy consumption of buildings.This paper studies on the outdoor wind environment of the bottom overhead buildings in Qingdao.The main research work is:(1)Basic research on the outdoor wind environment of the bottom overhead buildings in Qingdao area.In the second chapter,I investigated the current situation of climate and wind resources in Qingdao area by consulting the literature.Then,I investigated the development history and current situation of the bottom overhead buildings in Qingdao area.These provide a basis for the study of the outdoor wind environment in Qingdao.I also researched on the policies about overhead buildings and indicators,focusing on the maximum wind speed,wind speed amplification coefficient,average wind speed,wind pressure difference,air vortex,the age of the air and so on.Finally,I analyzed the advantages of bottom overhead buildings,mainly includes: enhancing ventilation,enhancing shading,riching outdoor architectural space and optimizing the quality of the environment.(2)Study on the outdoor wind environment of a single bottom overhead building in Qingdao.In the third chapter,I divide the single bottom overhead building into four types,which are complete overhead building,opening overhead building,the cantilever building and other types.Then I used CFD technology to simulate the outdoor wind environment of the common building and three kinds of bottom overhead buildings.I got the characteristics of each type of outdoor wind environment through the analysis.Then,I used CFD technology to study the influence factors of each type from the height of bottom overhead building,width of bottom overhead building,depth of bottom overhead building,height of the building and the length of the building,.In the end,I got the influence factors of the outdoor wind environment of the bottom overhead building.(3)Study on the outdoor wind environment of bottom overhead building groups.In the fourth chapter,firstly I studied the site design of building,mainly divided into building site selection,site landscape design,building distance design.I used CFD technology to analyze the changes of the wind environment of four groups of buildings when the bottom of the building is overhead.At last,I studied the layout problem,including the layout of the building and the layout of the overhead position.(4)Wind environment optimization based on the bottom overhead of the Luxin Changchun Garden in Laoshan District,Qingdao City.In the fifth chapter,I applied the results to an engineering example.Taking Luxin Changchun Garden as anexample,I put a part of the buildings to take the optimization of the bottom overhead in view of the phenomenon that ventilation is not smooth in the original plan.Eventually,I achieved the purpose of improving the outdoor wind environment.In this paper,I used CFD technology to study the outdoor wind environment of the bottom overhead buildings.I got the method about the bottom of the architectural design in Qingdao,hoping to provide a theoretical basis for the overhead construction design in the future.