Research On The Design Method For Constant-holistically Shadowed Outdoor Space Of Central Business District In Hot-summer Area

The climate is hot in summer.As an important place for people’s daily activities,outdoor space quality is increasingly valued.Green planning and design become an inevitable trend.Low carbon and energy-saving design in summer hot area is very important.This paper takes the outdoor “Constant-holistically shadowed” space of the central business district as the research object,through the study of the mental impact and physical experience of the office workers,pedestrians,residents and tourists in the specific central business district of the hot summer area and the shadow space on the office workers,the surrounding pedestrians,residents and tourists,combining with the actual investigation and discussion of the problems existing in the outdoor space of the central business district,analyzes the impact factors of shadow space construction Prime.Considering the particularity of the people in the CBD,to meet the needs of different people for outdoor shadow space,to improve the problems of insufficient effective shadow space,low quality,limited space range,mismatch between space and outdoor activity time period of the people.In addition,the shadow space shows space-time dynamics and finiteness in space orientation,size,shape and time length.Ecotect,Sketch Up and other software are used to simulate and analyze different building volumes,combinations and scenes.Under the influence of the mechanism of the shadow structure,the supplementary shadow measures of buildings,structures,green plants and a variety of shadow combination are taken to improve the central business district in the hot summer area In summer,due to the strong solar radiation and the poor thermal comfort of the crowd,the shadow of the external site of the central business district is optimized to improve the shadow quality and guide the road around the central business district,the green vegetation of the outdoor space of the central business district,water landscape,outdoor sketch and design optimization.My research contents mainly include the following aspects:(1)to simulate the different architectural forms and the space of "Constant-holistically shadowed",to make clear the layout and types of the space of "Constant-holistically shadowed" in summer and the space with better thermal comfort in microclimate.(2)This paper analyzes the relationship between the planning influencing factors of the outdoor "Constant-holistically shadowed" space in the central business district,discusses the spatial effect of the structures and green plants on the "Constant-holistically shadowed" space,provides reference for the construction of the "Constant-holistically shadowed" space,and puts forward corresponding design strategies.The main conclusions of this study are as follows:1.The building shape is affected by the difference of the shade line,and the spatial difference of the "Constant-holistically shadowed" space is significant.There are great uncertainties in the layout ofCBD buildings,which affect the spatial form,orientation,quality and scale of "Constant-holistically shadowed" space.Properly adjust the angle of the building structure to increase the shadow area to a certain extent and enhance the light and shadow effect in the site.The circular or nearly circular shape of the single building is beneficial to reduce the solar radiation and improve the space quality of the site.2.The spatial range of "Constant-holistically shadowed" space formed by the horizontal plant model is smaller than that of the long column plant model,and the spatial quality of "Constant-holistically shadowed" space of the horizontal plant model is higher at noon.Under the same sunshine condition and similar crown and branch height,the shadow and "Constant-holistically shadowed" space of the long column plant model is larger than that of the horizontal plant model,which is conducive to the construction of "Constant-holistically shadowed" space.3.In the hot summer area,the arrangement position of the structure is consistent with the best orientation,which can increase the cooling effect of the structure on the site.In architectural form,the tower building forms a narrow space of "Constant-holistically shadowed" space,which is suitable for areas with less shadow demand.The plane is a circular structure with a large space radiation range of "Constant-holistically shadowed" space.4.Buildings with high sunlight requirements are arranged in the sun,and buildings with high sunlight avoidance are arranged in the North shade.The layout density and shape of the buildings affect the sunshine and shadow areas.The close layout and relatively concentrated shape of the buildings are conducive to strengthening the mutual shielding relationship between the buildings and increasing the space and quality of "Constant-holistically shadowed" space.5.Pay attention to green plants,verandas,pavilions,flower racks,membrane structures and other structures to build a "Constant-holistically shadowed" space,and improve the thermal comfort of the outdoor space of the central business district with water landscape.Hot summer climate,outdoor space as an important place of people’s daily activities,space quality is increasingly valued,people’s urgent demand for shadow area,green planning and design become an inevitable trend,low-carbon energy-saving design in hot summer area is very important...