摘要
近年来,雾霾问题逐渐成为严重困扰我国北方局部区域人们正常工作和生活的因素之一。为了解决雾霾问题和改善城市通风效果,除了减排之外,控制楼房高度、规划建设城市风道也被作为建议见诸报道,其真实效果值得研究。利用建筑结构荷载规范,分析了不同粗糙度类别下不同高度处的风速分布,将田野乡村和城市地貌上的风速进行对比,分析了城市建筑对风速降低的程度,并探讨了城市风道的作用,发现无论是降低城市建筑的高度,还是开辟城市风道,对地表附近风速的增大效果十分有限。
Haze has gradually become one of the most concerned problems in recent years,and has seriously plague the normal work and life of people in northern China.In order to solve haze problem and improve city ventilation,buildings height control and air path construction have been reported as solutions besides carbon emission reduction,while their effects are worth studying.By use of the load code for the design of building structures,wind velocity distribution in different height under different terrain roughness was analyzed.The wind velocity in country and city were compared,and the effect of city buildings on reduction degree of wind velocity was analyzed.Moreover,the effect of air path was discussed.Results show that either reducing the height of urban buildings or opening up urban air ducts,the effect on increasing wind speed near the ground is very limited.
引文
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