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原文传递 Engineering Analysis of a Full-Scale High-Resolution Tornado Wind Speed Record

题名：	Engineering Analysis of a Full-Scale High-Resolution Tornado Wind Speed Record
其他题名：	Alexander,C.R.,and Wurman,J.(2008)."Updated mobile radar climatology of supercell tornado structures and dynamics."Preprints,24th Conf.on Severe Local Storms,American Meteorological Society,Boston.
正文语种：	英文
作者：	Franklin T. Lombardo
关键词：	tornado；engineering；three-dimensional；record；difference；statistics；period；speed；pressure；include
摘要：	A three-dimensional (3D) sonic anemometer at a height of 2.5 m serendipitously recorded a tornado event in Arizona on October 6, 2010. The anemometer, which was in place for carbon flux experiments and sampling at 20 Hz, recorded a peak instantaneous wind speed of 83 m=s. Over a 45-s period, which included the peak wind speed, the wind speed and direction time history showed evidence of seven distinct periods of behavior. These periods corresponded to rapid changes in wind speed (i.e., acceleration) and wind direction. This period also included significant positive and negative vertical wind speeds. Although 9 s of recorded data in this period was missing due to issues with data recording, these data could be an invaluable starting point for the future of tornado-based structural design. Analyzing the record in the context of wind engineering, variables and statistics typically used in wind engineering showed marked differences from those assumed in wind load codes and standards, including large gust factors for very short averaging times and significant changes in pressure coefficients for a roof corner. These differences should be further researched and quantified.
出版年：	2018
论文唯一标识：	P-26Y2018V144N02032
英文栏目名称：	TECHNICAL PAPERS
doi：	10.1061/(ASCE)ST.1943-541X.0001942
期刊名称：	Journal of Structural Engineering
拼音刊名(出版物代码)：	P-26
卷：	144
期：	02
页码：	378-386