Modelling and simulating the extreme wind effect on structures

模拟和模拟极端风对结构的影响

基本信息

批准号：
RGPIN-2016-06776
负责人：
Dragomirescu, Elena
金额：
$ 1.97万
依托单位：
University of Ottawa
依托单位国家：
加拿大
项目类别：
Discovery Grants Program - Individual
财政年份：
2017
资助国家：
加拿大
起止时间：
2017-01-01 至 2018-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636438
关键词：
Modelling simulating extreme wind effect

项目摘要

Over the past 20 years, more than 221 severe wind events were recorded yearly in Canada, and their effects on critical infrastructure have direct consequences on decreasing safety levels for populations in affected areas. Massive structures, such as long-span bridges, are considered more resilient to strong wind effects than high-rise buildings, towers, and electrical transmission lines; however the complexity of these structures implies higher vulnerability of their exposed structural elements such as bridge decks, towers and cables. The aerodynamic stability verification of each element of bridges, and of the entire bridge structure, became a standard criteria for the long-span bridges design process; however a global tendency of developing and implementing a new generation of twin and triple deck bridges, which have the outstanding advantage of extending the main spans dimensions to more than 2,000 m, is currently undertaken by several international research communities. The Canadian representation in this topic consists in the quadruple bridge deck prototype, proposed by the applicant, which was tested by conventional experimental methods, and proved to have better aerodynamic stability. However, for long-span bridges with complex deck configurations, to pass extreme winds safety criteria verification, novel and versatile tests and dynamic stability criteria must be diligently elaborated and carried out.

过去 20 年来，加拿大每年记录超过 221 起强风事件，其对关键基础设施的影响直接导致受影响地区居民的安全水平下降。人们认为，大跨度桥梁等大型结构比高层建筑、塔楼和输电线路更能抵御强风影响；然而，这些结构的复杂性意味着其暴露的结构元件（例如桥面、塔架和电缆）更容易受到攻击。桥梁每个元件以及整个桥梁结构的空气动力稳定性验证成为大跨桥梁设计过程的标准准则；然而，目前一些国际研究团体正在开发和实施新一代双层和三层桥的全球趋势，其具有将主跨尺寸扩展到2,000 m以上的突出优势。加拿大在本课题中的代表性是申请人提出的四桥面原型，通过常规实验方法进行测试，证明具有较好的气动稳定性。然而，对于桥面结构复杂的大跨度桥梁，要通过极端风安全标准验证，必须认真制定和执行新颖且多功能的测试和动态稳定标准。