臺北市建成地區之建築已朝向高層化發展，導致都市風廊行經路徑常因此受到改變甚至阻礙，通風效率也相對受到影響。若要改善風環境，需從提升都市物理環境著手，而都市更新為改善建成區物理環境最直接的方式之一，並透過容積獎勵做為落實制度的誘因。然而，容積獎勵的核發，雖然可以促進都市更新，同時亦導致樓地板面積增加，進而推升建築物高度，加劇高樓層化現象，對於風環境造成預期之衝擊。為進一步了解衝擊的面向與程度，本研究選定臺北市更新地區分布相對集中之臺北市大同區「捷運中山雙連站周邊更新地區」做為研究範圍。
本研究依據「臺北市土地使用分區管制規則」所訂定的建蔽率及容積率作為建築量體設計，並設計六種開發強度的建築量體方案，包括基準容積和容積獎勵值10% 至50% 不等時，所呈現建築高度比的變化。這六組方案的風環境特性和行人舒適性將透過計算流體力學（Computational Fluid Dynamics，CFD）模擬和評估，模擬項目包括研究範圍平均風速和解析範圍通用熱氣候指數（Universal Thermal Climate Index，UTCI）。
研究結果顯示，容積獎勵核發比例於不超過基準容積一點五倍之情況。風環境模擬方案發現，行人風場的風速隨著容積獎勵額度增加而略微增加，但平均風速未達行人風場之最低風速要求。熱環境模擬方案發現，對於行人的熱舒適改善效果並不顯著。對此，建築物的排列和高度分佈不均勻仍是影響風流流徑和風速快慢的主要因素。
The buildings in Taipei City's urban areas have been developing towards high-rise construction, which has led to changes and even obstructions in the urban wind corridor paths, thereby affecting ventilation efficiency. To improve the wind environment, it is necessary to focus on enhancing the urban physical environment, and urban renewal is one of the most direct ways to improve the physical environment of existing areas, using floor area ratio bonus as an implementation mechanism. However, while the issuance of floor area ratio bonus can promote urban renewal, it also leads to increased floor areas and subsequently higher building heights, exacerbating the phenomenon of high-rise construction and causing expected impacts on the wind environment. In order to further understand the aspects and extent of these impacts, this study selected the "Metro Zhongshan Shuanglian Station Surrounding Renewal Area" in Taipei City's Datong District, which has the second largest total area of renewal areas and a relatively concentrated distribution, as the research area.
This study is based on the "Taipei City Zoning" which define the floor area ratio and building coverage ratio as design parameters for building volumes. Six different building volume schemes were designed, including the baseline volume and volume incentives ranging from 10% to 50%, showing variations in building height ratios. The wind environment characteristics and pedestrian comfort of these six schemes will be evaluated through Computational Fluid Dynamics （CFD） simulations. The simulation parameters include average wind speed in the study area and Universal Thermal Climate Index （UTCI） in the analysis area.
The research findings indicate that within a limit of 1.5 times the baseline volume, the pedestrian wind speeds slightly increase with the increase in volume incentive levels. However, the average wind speeds do not meet the minimum requirement for pedestrian wind conditions, and thus the improvement in pedestrian thermal comfort is not significant. The uneven arrangement and distribution of buildings remain the primary factors influencing the airflow patterns and wind speed.
