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首页> 外文期刊>Journal of aerospace engineering >Numerical Simulation of Wind Fields at the Bridge Site in Mountain-Gorge Terrain Considering an Updated Curved Boundary Transition Section
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Numerical Simulation of Wind Fields at the Bridge Site in Mountain-Gorge Terrain Considering an Updated Curved Boundary Transition Section

机译：考虑弯曲边界过渡截面的​​山峡地形桥梁工地风场数值模拟

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摘要

To investigate the characteristics of wind fields at the bridge site in mountain-gorge terrains more accurately and rationally, an updated curved boundary transition section (BTS) was proposed in this study. The flow transition efficiency considering the updated curved BTS was first investigated and compared with those in previous studies. Then a mountain-gorge terrain model in which a long-span bridge straddles was configured as a typical numerical example by establishing two different BTSs in the computational domain for comparison purpose. Furthermore, the effects of different BTSs on the characteristics of wind fields at the bridge site with two different ranges of terrain region were comparably investigated. The results show that the updated curved BTS is very user-friendly with a straightforward expression and has a better flow transition efficiency than those reported previously. The wind speeds at the bridge site with the updated curved BTS outperform those with the ramp BTS. An appropriate shape of BTS can probably be more important than the size factor of the terrain region in terms of predicating the characteristics of wind fields at the bridge site in such mountain-gorge terrains. It is hoped that this updated curved BTS can serve as basics for analyzing the wind fields at the bridge site in mountain-gorge terrains, which will be of benefit to investigate the structure performance under wind loads not only in the design stage but also in the service stage. (c) 2018 American Society of Civil Engineers.
机译：为了更准确，更合理地研究山区峡谷地形中桥梁工地的风场特性，提出了一种更新的弯曲边界过渡段（BTS）。首先研究了考虑更新弯曲BTS的流动过渡效率，并将其与以前的研究进行了比较。然后，通过在计算域中建立两个不同的BTS进行比较，将其中一个大跨度跨桥的山峡谷地形模型配置为典型的数值示例。此外，比较了两种不同的BTS对桥面风场特性的影响，该桥面具有两个不同的地形区域范围。结果表明，更新的弧形防弹少年团非常人性化，表达直观，比以前报道的具有更好的流动转换效率。更新的弯曲BTS在桥梁工地的风速优于坡道BTS。就预测此类山区峡谷地形中桥梁站点的风场特性而言，合适的BTS形状可能比地形区域的大小因素更为重要。希望此更新的弯曲BTS可以作为分析山区峡谷地形中桥梁工地风场的基础，这将有益于研究风荷载下的结构性能，不仅在设计阶段，而且在设计阶段也是如此。服务阶段。 （c）2018年美国土木工程师学会。

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