| 深切峡谷桥址区风场空间分布特性的数值模拟研究 |
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| 引用本文： | 李永乐,蔡宪棠,唐康,廖海黎. 深切峡谷桥址区风场空间分布特性的数值模拟研究[J]. 土木工程学报, 2011, 0(2): 116-122 |
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| 作者姓名： | 李永乐 蔡宪棠 唐康 廖海黎 |
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| 作者单位： | 西南交通大学; |
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| 基金项目： | 国家自然科学基(90915006); 教育部新世纪优秀人才支持计划(NCET-06-0802); 四川省杰出青年学科带头人计划(2009-15-406) |
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| 摘 要： | 以大跨度山区悬索桥为工程背景,针对深切峡谷桥址区复杂的地形地貌,应用CFD商业软件FLUENT进行区域地形风场数值模拟分析,通过多工况的计算分析,揭示了复杂地形地貌桥址区空间风场的分布特征,对比分析桥址区风速沿竖向和沿主梁方向的变化特点,确定不同攻角情况下桥面风速及其与梯度风速的比值关系,并根据风洞试验及风致响应分析的需要,提出以包络线表示的风速-风攻角对应关系。研究表明,深切峡谷桥址区风场特性复杂,具有明显的三维特征,与跨海及跨江大桥桥址区的风场特性存在明显差异。研究结论为桥梁设计风速确定及进一步的抗风设计提供依据。
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| 关 键 词： | 大跨度桥梁 复杂地形 桥址区 风场特性 计算流体动力学 |
Study of spatial distribution feature of wind fields over bridge site with a deep-cutting gorge using numerical simulation |
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| Li Yongle Cai Xiantang Tang Kang Liao Haili. Study of spatial distribution feature of wind fields over bridge site with a deep-cutting gorge using numerical simulation[J]. China Civil Engineering Journal, 2011, 0(2): 116-122 |
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| Authors: | Li Yongle Cai Xiantang Tang Kang Liao Haili |
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| Affiliation: | Li Yongle Cai Xiantang Tang Kang Liao Haili(Southwest Jiaotong University,Chengdu 610031,China) |
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| Abstract: | A long-span suspension bridge over a deep-cutting gorge in mountain area is employed as a typical example.Numerical simulation of the wind field distribution of the bridge site with complex terrain is carried out by employing CFD commercial software FLUENT.According to the calculation analyses of different cases,the spatial distribution feature of the wind field over the bridge site with complex terrain is explored,and the variations of wind velocities along the vertical direction and along the bridge deck ... |
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| Keywords: | long-span bridge complex terrain bridge site wind characteristic calculated fluid dynamics(CFD) |
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