Affected by the Super Typhoon“Mangkhut,”a total of five base towers of a transmission line in the mountainous area of China collapsed.In this paper,a mathematical model is established based on the Shuttle Radar Topo...Affected by the Super Typhoon“Mangkhut,”a total of five base towers of a transmission line in the mountainous area of China collapsed.In this paper,a mathematical model is established based on the Shuttle Radar Topography Mission(SRTM)data near the accident tower.The measured wind speed in the plain area under the mountain is used as the calculation boundary condition.The wind speed at the top of the mountain is calculated by using a numerical simulation method.The design wind speed and calculated wind speed at the tower site are compared,and the influence of wind speed on tower position in this wind disaster accident is analyzed.展开更多
Rapid damage prediction for wind disasters is significant in emergency response and disaster mitigation,although it faces many challenges.In this study,a 1-km grid of wind speeds was simulated by the Holland model usi...Rapid damage prediction for wind disasters is significant in emergency response and disaster mitigation,although it faces many challenges.In this study,a 1-km grid of wind speeds was simulated by the Holland model using the 6-h interval records of maximum wind speed(MWS) for tropical cyclones(TC) from 1949 to 2020 in South China.The MWS during a TC transit was used to build damage rate curves for affected population and direct economic losses.The results show that the Holland model can efficiently simulate the grid-level MWS,which is comparable to the ground observations with R2 of0.71 to 0.93 and mean absolute errors(MAEs) of 3.3 to 7.5 m/s.The estimated damage rates were in good agreement with the reported values with R^(2)=0.69-0.87 for affected population and R^(2)=0.65-0.84 for GDP loss.The coastal areas and the Guangdong-Hong Kong-Macao Greater Bay Area have the greatest risk of wind disasters,mainly due to the region’s high density of population and developed economy.Our proposed method is suitable for rapid damage prediction and supporting emergency response and risk assessment at the community level for TCs in the coastal areas of China.展开更多
基金CRSRI Open Research Program(Project No.CKWV2014202/KY).
文摘Affected by the Super Typhoon“Mangkhut,”a total of five base towers of a transmission line in the mountainous area of China collapsed.In this paper,a mathematical model is established based on the Shuttle Radar Topography Mission(SRTM)data near the accident tower.The measured wind speed in the plain area under the mountain is used as the calculation boundary condition.The wind speed at the top of the mountain is calculated by using a numerical simulation method.The design wind speed and calculated wind speed at the tower site are compared,and the influence of wind speed on tower position in this wind disaster accident is analyzed.
基金financially supported by the National Key R&D Program of China (2021YFC3001000)National Natural Science Foundation of China (41871085)the Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) (311021004)。
文摘Rapid damage prediction for wind disasters is significant in emergency response and disaster mitigation,although it faces many challenges.In this study,a 1-km grid of wind speeds was simulated by the Holland model using the 6-h interval records of maximum wind speed(MWS) for tropical cyclones(TC) from 1949 to 2020 in South China.The MWS during a TC transit was used to build damage rate curves for affected population and direct economic losses.The results show that the Holland model can efficiently simulate the grid-level MWS,which is comparable to the ground observations with R2 of0.71 to 0.93 and mean absolute errors(MAEs) of 3.3 to 7.5 m/s.The estimated damage rates were in good agreement with the reported values with R^(2)=0.69-0.87 for affected population and R^(2)=0.65-0.84 for GDP loss.The coastal areas and the Guangdong-Hong Kong-Macao Greater Bay Area have the greatest risk of wind disasters,mainly due to the region’s high density of population and developed economy.Our proposed method is suitable for rapid damage prediction and supporting emergency response and risk assessment at the community level for TCs in the coastal areas of China.
