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臺灣都會地區風速剖面之探討

ANALYSIS OF WIND SPEED PROFILE OF TAIWAN METROPOLITAN AREA

摘要


臺灣位處西太平洋熱帶氣旋盛行區,每年有不下3個颱風侵襲臺灣,對人們生活與生命財產造成威脅。隨著經濟高速發展,人口逐漸集中都市,使得都會地區建築物高度向上發展。臺灣現行風力設計規範所訂定的風速剖面,梯度高度最高只到500公尺且假設在梯度高度以上風速保持均勻等速;然而,真實的自然風場風速並非如此,與設計規範假設不同。本研究主要利用2015~2017之8個颱風資料和之前的研究數據,藉由中央氣象局所釋放探空氣球所得之風速數據,取時段大於10(m/s)之風速資料,探討臺灣地區颱風期間之風速剖面,相信研究成果將有助於未來臺灣風力規範修訂之參考。

並列摘要


The current wind design specifications of Taiwan are based on the gradient height up to 500 meters, above the gradient height, assuming the gradient wind speed to maintain a uniform velocity, however, the wind speed of real natural wind field is not maintained constant after reaching the gradient height, and it may occurs shrink phenomenon or external expansion phenomenon. It is different from design specifications. This study is about using the wind speed higher than 10(m/s) of typhoons periods. Using the wind speed data of the Central Weather Bureau cast by radiosonde, this research includes the data of Banciao station and Hualien station for eight typhoons from 2015 to 2017. The research results will be helpful for structure design and to provide more references for revising the wind design specifications of Taiwan in the future.

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