福州大学学报（自然科学版）2017，Vol.45Issue(4)：466-471,6.DOI:10.7631/issn.1000-2243.2017.04.0466
复杂山区水库蓄水影响下的库区桥址风特性数值模拟研究
Numerical simulation of wind characteristics over bridge site in complicated mountains under the influence of reservoir water storage
摘要
Abstract
A long-span suspension bridge over a deep-cutting gorge in complicated mountain area is regarded as an example.The numerical terrain model after reservoir water storage is built.Numerical simulation of the wind field distribution of the bridge site is carried out.According to comparative analysis of 36 cases of different wind directions,the variation of average wind velocity,wind attack angel,wind profile,and wind velocity amplification factor along bridge deck in different flow directions are discussed.The result shows that the mountain wind characteristics over the reservoir area is very complex.Transverse average wind velocities of bridge deck change a lot in different flow directions,and a big negative attack angel is found on bridge deck.Transverse wind velocities decline along the bridge deck from north shore to the south shore in typical cases.Distribution of wind profile is complex in most cases,which is far different from the general exponential law.The bridge site has a relatively obvious acceleration effect with a wind velocity amplification factor up to 1.06.The research conclusions provide a basis for wind-resistant design of long-span mountain bridges over reservoir area.关键词
水库蓄水/复杂山区/大跨度桥梁/风场特性/数值模拟Key words
reservoir water storage/complicated mountain/long-span bridge/wind characteristic/numerical simulation分类
建筑与水利引用本文复制引用
王云飞,汪斌,李永乐..复杂山区水库蓄水影响下的库区桥址风特性数值模拟研究[J].福州大学学报（自然科学版）,2017,45(4):466-471,6.基金项目
国家自然科学基金资助项目(51525804,51508480) （51525804,51508480）
四川省青年科技创新研究团队资助项目(2015TD0004) （2015TD0004）
