Preliminary Study On High-rise Residential Layout Patterns Based On Wind Environment Optimization In Xiamen

In the trend of China’s economic growth pattern transforming into the "new normal",urban development model is shifting from large-scale,quantitative urbanization model to intensive,quality urbanization model as well.In the case of increasingly serious urban climate issues,urban construction activities under the guidance of scientific and refined design are effective ways to improve urban climate and environment.Due to the high land use efficiency of high-rise residential district,its construction capacity has been high and the area of high-rise residential districts has accounted for a considerable proportion of urban land.Therefore,suitable high-rise residential districts design is a key segment in alleviation of urban climate issues.In view of the high complexity of the outdoor wind environment,researches on outdoor wind environment design of high-rise residential districts need to be carried out.This study explored the influence mechanism of high-rise residential district layout pattern on its outdoor wind environment in Xiamen.Firstly,taking regional climatic characteristics of Xiamen City into consideration,systematic and relative assessment framework of wind environment is constructed based on existing evaluation frameworks of wind environment.In addition,the visualization of the evaluation method is improved by the introducing of radar map.Secondly,under the guidance of existing urban residential district design theory,the framework of typical layout pattern and typical layout models of high-rise residential districts are established by analyzing the status quo of residential area construction in Xiamen.Thirdly,wind environment characteristics of typical layout patterns are obtained by method of numerical simulation.Fourthly,by using relative evaluation framework to analyze numerical simulation results and considering characteristics of layout patterns,influence mechanism of the number and the distribution of house clusters,the shape of open space on the ventilation capacity and the wind comfort degree are obtained.Fifthly,based on the assessment of the regional wind resources in Xiamen,considering the influence mechanism of high-rise residential district layout pattern on its outdoor wind environment,preliminary suggestions on the layout design of high-rise residential areas in different regions are proposed to optimize the urban wind environment.Research shows that relative assessment framework of wind environment and the overall assessment process that from the whole to the details are effective tools for comparative analysis of outdoor wind environment.The residential layout model,which takes into account general design rules and configuration characteristics of regional settlements,is the essential precondition of the applying wind environmental research results.By using the method of controlling variables in experiment,specific wind environmental impact mechanism can be extracted.Finally on these foundations,optimization strategy,which fully considers the influence mechanism of layout patterns on wind environment,and which takes into account the regionalized climatic conditions,and which complies with the planning requirements from upper levels,will also be more targeted and effective.