Estimating Typhoon Haiyans Wind Speeds Using Windicators and Post- Storm Wind Vulnerability Analysis on the Affected Areas
On November 2013,there was widespread devastation over the Visayan Region due to the onslaught brought by Typhoon Haiyan,which was hyped as the strongest landfalling cyclone.Despite of that,a new benchmark for future disaster preparations cannot be established due to the discrepancies between various weather bulletins on how strong Haiyan really was,as well as the loss of vital meteorological data during Haiyans passage.To remedy the shortage and discrepancy of Typhoon Haiyans meteorological data,a forensic structural analysis was done on windicators through a field survey done on Leyte and Samar Island.Windicators are structural objects of interest whose structural failure will lead to estimating the magnitude of the winds that brought the failure,in this case,the strength of Typhoon Haiyan,which in turn was used to determine and re-assess the wind vulnerability of the regions affected,using also the historical wind data from Tacloban and Guiuan station,comparing with that to the current design wind speeds prescribed by the NSCP.The study determines through the analysis of four windicators,that before its landfall at Leyte Island,Typhoon Haiyan has 1-minute sustained winds of 351 kph,10-minute sustained winds of 290 kph,and through the analysis of the reamining surface data,which corresponded well into forming a model of the storm,Typhoon Haiyan,before its landfall at Guiuan,Eastern Samar,has 10-minute sustained winds of 317 kph and 1-minute sustained winds of 352 kph,with minimum central pressures of 868.5 mbar and 872.2 mbar at 4:10 am and 5:10 am respectively.Statistical analysis determined that the existence of a storm like Typhoon Haiyan,regardless whether it would make landfall has a minimum recurrence period of 500 years and the event that such storm makes landfall has a minimum recurrence period of 5600 years on the areas affected.
windicators typhoon haiyan forensic structural analysis computational fluid dynamics wind engineering geophysical fluid dynamics
Joshua AGAR Jaime HERNANDEZ
University of the Philippines Diliman,Philippines
国际会议
2017世界可持续建筑环境大会(the World Sustainable Built Environment Conference)
香港
英文
1265-1279
2017-06-05（万方平台首次上网日期，不代表论文的发表时间）