A Study On The Spatial Form Of High Density Commercial Blocks In Coastal Cities From The Perspective Of Microclimate

With the rapid development of cities and society,the intensity of urban construction is gradually increasing,and high-density has become a demand for future urban development.Urban business districts are gradually showing a trend of high-density development,which has led to a series of changes in the spatial form of business districts,thereby having an important impact on the urban microclimate environment.At present,the research direction of the impact of urban spatial morphology on microclimate environment is mainly carried out at the macro scale,mesoscale,and block scale.This article discusses the impact mechanism of the spatial form and microclimate environment of high-density commercial blocks at the block scale.As an important activity place for urban residents,commercial blocks are increasingly receiving attention and attention to their outdoor thermal comfort requirements.Improving the outdoor space quality of highdensity commercial blocks in cities is of great significance for urban development and the improvement of living environment.This study takes a typical coastal city-Qingdao as a research example,and takes high-density commercial blocks from different business districts in Qingdao as the research object.It explores the relationship between spatial form elements of high-density commercial blocks and microclimate,determines the interval range of spatial form elements of different blocks,and proposes spatial form optimization and regulation strategies for improving microclimate at the block scale.By conducting research and measurement on high-density commercial blocks,the spatial form of high-density commercial blocks in Qingdao city is extracted and summarized,and typical high-density commercial blocks in Qingdao city are identified.Microclimate elements such as air temperature,air humidity,and wind speed are measured and scientifically validated based on simulation data to determine the applicability of the simulation software ENVI met.Through single factor variable numerical simulation under different operating conditions,the spatial form index range of high-density commercial blocks that is most suitable for coastal climate characteristics is found,providing design strategy reference for improving coastal high-density commercial blocks.The full text is divided into six chapters,as follows:Part I: Introduction.Mainly explain the research background,purpose,and significance of this article,clarify the research content and methods of high-density commercial blocks from the perspective of microclimate;Secondly,organize the research results on microclimate environment and high-density commercial block elements both domestically and internationally,providing a reasonable research method reference and theoretical basis for this study;Finally,based on current research literature and theoretical foundations,analyze and summarize to form a comprehensive research framework.Part II: Analysis and organization of relevant concepts and elements of block spatial form.Elaborate on relevant concepts and introduce the methods and means required in the research process of block spatial form.Finally,summarize and summarize the range of spatial form elements of high-density commercial blocks in Qingdao,and select typical high-density commercial blocks in Qingdao to provide research objects for on-site measurement and scientific verification of software.Part III: Conduct field testing and research on selected typical neighborhoods.Use instruments to collect measured data on microclimate factors such as air temperature,air humidity,and wind speed in typical high-density commercial blocks.The measurement dates are selected on typical days in winter and summer.Process and analyze the collected measured data to identify the current problems in the neighborhood,and use Rayman software to calculate the physiological equivalent temperature PET value of the measured neighborhood,and identify the indicator factors that affect thermal comfort.Part IV: Simulation research on spatial form elements and microclimate elements of high-density commercial blocks.The first step is to verify the accuracy of ENVI met simulation software.Establish a model and simulate the selected typical block in the software,and then compare the simulated data with the measured data to determine whether it is suitable for this study;Secondly,data simulation was conducted on the single factor variables of the spatial form elements of high-density commercial blocks under different operating conditions.Establish an ideal model for different operating conditions based on the district values of the high-density commercial block morphology indicators summarized above.Starting from the three block index parameters of building density,block orientation,and block aspect ratio,and analyzing and comparing the simulation results,the element intervals of high-density commercial blocks that are suitable for the coastal environmental characteristics are found.Part V: Analyze the correlation between the spatial form elements of each highdensity commercial block and the PET value of the human thermal comfort index,and determine the mathematical model formula for the winter and summer seasons.And review the entire research process,demonstrate the process of optimizing design strategies,and organize the analysis results of the previous research.At the same time,propose relatively reasonable and scientific planning suggestions for the three morphological indicators of building density,block orientation,and street aspect ratio.Part VI: Conclusion and outlook.Summarize and summarize the main conclusions drawn in this article,identify the shortcomings and shortcomings,and propose ideas and prospects for further research.