Developing planning indicators for outdoor wind environments of high-rise residential buildings

Abstract

Abstract:The construction of a building may change the microclimate in the vicinity, and planning indicators in a master plan may directly affect the outdoor physical environmental quality in residential areas. An inappropriate plan for a site may accelerate wind and intensify vortexes over places on the pedestrian levels, which leads to an adverse outdoor environment. Therefore, the design of a cluster of buildings should not focus only on the buildings but also provide a good outdoor environment around the buildings. To tackle the problem of inadequate wind environment, the relationship between the building's floor area ratio and height was identified in this study as the main planning indicator to be examined on its effects on the outdoor wind environment. A computational fluid dynamics (CFD) model was hence developed to simulate the wind conditions generated by some typical site layouts with different values for planning indicators under relevant weather conditions, which were typical of those in Hangzhou, China. The simulated wind conditions are assessed using the wind speed ratio over the whole area of the building cluster at the pedestrian level. The effects on the local wind condition due to the varying of the planning indicators are discussed whilst considering the potential construction costs. The indicators resulting in better external conditions are highlighted in the conclusion as the recommendation which could be used as a rule of thumb by architects and planners at the master planning stage. The study disproves the common belief in the practice that a lower floor area ratio means fewer buildings and therefore greater external comfort. In fact, the higher the building, the greater the outdoor comfort wind zone for pedestrians. However, the increment in comfort area is limited to buildings extending from 25 to 30 levels.

Evaluation of enterprise technology innovation capability in prefabricated construction in China

“…“PO” is another output index of enterprise technology innovation capability in PC, which is divided into four sub-indexes, including the NDP (Shi et al , 2016), DPL (Furman et al , 2000), construction area of the project ( CAP ) (Ying et al , 2016) and APRC (Zhang et al , 2017). These sub-indexes are not available in conventional construction and other fields.…”

“…Construction area of the project. The construction area of PC projects indicates the project's scale (Ying et al, 2016). The number of projects and the CAP has a positive correlation, but reflect different aspects of technology innovation capability of a construction enterprise in PC.…”

Influence of Waterside Buildings’ Layout on Wind Environment and the Relation with Design Based on a Case Study of the She Kou Residential District

“…As building height has influence on wind distribution [29] , the vertical layout on wind environment is studied.…”

An Investigation of the Correlation between Pollutant Dispersion and Wind Environment: Evaluation of Static Wind Speed

“…In recent years, there have been some important results for the research on the correlation between pollutant dispersion and wind environment, as shown in Table 1. It includes the research methods of the relationship between pollutant diffusion and wind environment [6][7][8][9][10][11][12], the influence of wind on urban pollution diffusion at various scales [13][14][15][16][17][18][19], the relationship between wind, pollutant diffusion and urban scale layout [20][21][22][23][24][25][26][27][28][29], and the establishment of new ventilation efficiency evaluation index [30]. From these studies, the following conclusions can be drawn:…”