建筑结构学报2025，Vol.46Issue(3)：182-192,11.DOI:10.14006/j.jzjgxb.2024.0228
广州钟落潭镇龙卷风灾害调查与分析
Investigation and analysis of tornado disaster in Zhongluotan Town,Guangzhou City
摘要
Abstract
Tornadoes are characterized by their sudden occurrence and the difficulty in accurately forecasting them,and post-disaster investigations represent a primary method in structural wind engineering for assessing wind disaster intensity and structural damage characteristics.To this end,a field investigation was carried out on the April 27 tornado disaster in Zhongluotan Town,Guangzhou.Through the in-depth investigation and statistical analysis of 471 characteristic points of six routes at the disaster site,it is found that the tornado's moving path is about 8.2 km from west to east-southeast,with an average path width of about 700m and a maximum path width of about lkm.Combining GB/T 34301-2017"Technical specification for tornado damage investigation"and GB/T40243-2021"Tornado intensity scale",the EF evaluation methods were summarized,and the tornado damage phenomena of each EF level was summarized based on structural wind damage.It is judged that the tornado in Zhongluotan Town is of EF3 grade.According to the assessment of wind disaster damage to on-site building structures,the proportions of buildings with no damage,light damage,moderate damage,considerable damage,and severe damage are found to be 60.32％,7.42％,10.21％,3.71％,and 18.33％,respectively.The intensity of structural damage follows a trend of increasing first and then decreasing along the path of the tornado.Most of the affected buildings are metal roof structures,the proportions among which there is no obvious damage,slight visible damage,roof plate deformation,roof truss bending,rigid structure collapse accounts for 63.34％,6.48％,9.23％,3.49％,17.46％,respectively.The damage forms and causes of metal roof structures were analyzed,and it was suggested that strengthening measures should be taken in the key parts such as roof ridge,eaves,roof corner and overhang to cope with extreme wind disasters.According to the site markers of structural wind disaster,the gust wind speed in this extreme storm disaster event is greater than or equal to 74.59 m/s.关键词
龙卷风/灾害调研/强度等级/大跨度屋盖结构/抗风措施Key words
tornado/damage investigation/strength grade/large-span roof structure/windproof measure分类
建筑与水利引用本文复制引用
胡松雁,吴健,杨易,谢壮宁..广州钟落潭镇龙卷风灾害调查与分析[J].建筑结构学报,2025,46(3):182-192,11.基金项目
国家自然科学基金项目(52178480),广东省基础与应用基础研究基金项目(2022A1515010350),亚热带建筑与城市科学全国重点实验室资助项目(2024ZB10). （52178480）
