Tornado wind hazard mapping and equivalent tornado design wind profile over Canada
发布时间:2024-03-18 浏览次数:
洪汉平教授,哈尔滨工业大学(深圳)土木与环境工程学院。洪教授在墨西哥国立自治大学获得工学学士、硕士以及博士学位。哈尔滨工业大学(深圳)土木与环境工程学院教授,西安大略大学(UWO)土木与环境工程系教授(1996-2023),荣休教授(2023-),兼职教授(Adjunct professor 2023-)。在1996年加入UWO前,洪教授在石油和天然气领域工作6年,研究腐蚀下石油和天然气管道的维修优化策略。洪教授的研究重点包括概率分析在土木工程的应用、可靠性和风险评估、台风地震灾害建模和设计规范校准等领域,在基于可靠性和经济高效性的结构设计规范开发和基础设施改造方面做出突出贡献。同时还参与多个结构设计规范和标准委员会。其中包括加拿大国家建筑规范(结构设计常务委员会)和加拿大公路桥梁设计规范。洪教授是加拿大土木工程学会院士、墨西哥工程院外籍院士和加拿大工程院院士。
Tornadoes cause property damage and fatalities. A systematic assessment of tornado wind velocity hazard is presented in the present study for Canada based on reported historical tornado catalogue. For the assessment, the Poisson model, zero-inflated Poisson model, and negative binomial model, as well as the adaptive Gaussian kernel smoothing technique, are used to model tornado occurrence. The modeling takes into account the tornado reporting bias due to population density and uses the cloud-to-ground lightning flash density and the thunderstorm days as the explanatory variables. Statistical analysis results indicate that the negative binomial model is preferable.
The tornado wind velocity hazard maps for Canada, in terms of wind velocity at 10 m height above the ground surface and return period T, VT(10), are developed based on an available probabilistic tornado wind field model. Also, a simple equivalent tornado design wind profile is developed based on the return period value of tornado wind speed at different heights. The developed tornado design wind profile only depends on VT(10), which greatly facilitates its potential use for structural design subjected to tornado wind load and its possible implementation in structural design code and standards.