| 西部山区斜拉桥风特性观测及数值仿真 |
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| 引用本文： | 张玥,胡兆同,刘健新.西部山区斜拉桥风特性观测及数值仿真[J].长安大学学报(自然科学版),2011(5):44-49. |
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| 作者姓名： | 张玥 胡兆同 刘健新 |
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| 作者单位： | 西安科技大学建筑与土木工程学院;长安大学桥梁与隧道陕西省重点实验室; |
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| 基金项目： | 国家自然科学基金重大工程的动力灾变培育项目(90915001); 陕西省教育厅科研计划项目(11JK0894) |
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| 摘 要： | 针对山区地形地表类别不易确定、风环境复杂的问题,结合山西省禹门口黄河斜拉桥的实际工程,利用自行开发的桥梁风场特性分析系统,对桥址处一年多实测风速数据进行分析计算;并基于"数值风洞"模拟技术,采用Realizable和SST湍流模型,按有实桥结构和无实桥结构2种情况建模,模拟了7种工况下桥位及其周边的风场,得到了典型的西部山区峡谷风场的特点和规律。结果表明:受峡谷风效应影响,桥位风速增加;气流攻角在-9°～8°范围内,比平原地区大;风剖面应通过实测风速数据拟合,不能直接套用规范;湍流度和阵风因子小于一般气象强风条件下的值。
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| 关 键 词： | 桥梁工程 山区 风观测 数值模拟 风特性 风速剖面 |
Wind characteristics observation and numerical simulation of cable-stayed bridge site in Chinese western valley areas |
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| ZHANG Yue,HU Zhao-tong,LIU Jian-xin.Wind characteristics observation and numerical simulation of cable-stayed bridge site in Chinese western valley areas[J].JOurnal of Chang’an University:Natural Science Edition,2011(5):44-49. |
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| Authors: | ZHANG Yue HU Zhao-tong LIU Jian-xin |
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| Institution: | ZHANG Yue1,HU Zhao-tong2,LIU Jian-xin2(1.School of Construction and Civil Engineering,Xi'an University of Science and Technology,Xi'an 710054,Shaanxi,China,2.Key Laboratory for Bridge and Tunnel Engineering of Shaanxi Province,Chang'an University,Xi'an 710064,China) |
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| Abstract: | The land cover class in mountain terrain is difficult to be determined.So taking the Yumenkou Yellow river bridge in Shanxi province as an example,a data processing system of wind speed observation based on Borland C++ Builder is compiled to get one-year field measured data.Based on the technique of numerical wind tunnel adopts Realizable and SST turbulence modes,the model with the two situations whether there is bridge structure is developed to imitate the bridge site and the wind field under 7 working con... |
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| Keywords: | bridge engineering mountain wind observation numerical simulation wind characteristics wind-profile |
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