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.

在过去的20年中，每年在加拿大记录了221起严重的风事件，并且它们对关键基础设施的影响对降低受影响地区人口的安全水平有直接的影响。与高层建筑物，塔楼和电气传输线相比，大型结构（例如长跨桥）被认为对强风效应更具弹性。然而，这些结构的复杂性意味着它们暴露的结构元素（例如桥甲板，塔楼和电缆）的脆弱性更高。桥梁和整个桥结构的每个元素的空气动力稳定性验证成为长跨桥设计过程的标准标准；然而，目前，几个国际研究社区正在进行全球趋势，即开发和实施新一代的双甲板桥，具有将主要跨度尺寸扩展到2,000 m以上的杰出优势，目前是由几个国际研究社区进行的。该主题中的加拿大表示由申请人提出的四倍桥甲板原型组成，该原型由常规实验方法进行了测试，并证明具有更好的空气动力稳定性。但是，要使具有复杂甲板配置的长跨桥，必须严格阐述并执行极端风的安全标准验证，新颖和多功能测试以及动态稳定性标准。