|
|
|
| Numerical simulation of three-dimensional hurricane wind field around a long-span bridge |
| HAN Wan-shui1 LIU Huan-ju1 WU Jun1 XIAO Qiang2 YAN Li3 |
1.Highway College, Chang’an University, Xi’an 710064, China;
2. Jiangxi Provincial Transportation Design Research Institute Co., Ltd. , Nanchang 330002, , China;
3. Shyijiazhuang City 3rd Ring Road Management Division, Shijiazhuang 050051, China |
|
|
|
|
Abstract Due to hurricane disasters’ frequently occurring and long-span bridges’ features of high-pylon, light weight and weak damping, performing the safety assessment of long-span bridges under the action of hurricanes is necessary. Reasonable simulation of hurricane three-dimensional wind field is the chief problem to be faced. Firstly, adopting cubic spline functions, the time-varying average wind speed of hurricane was simulated. The harmonic synthesis method was adopted to update time-varying average wind velocity and then to realize the simulation of fluctuating parts of hurricane wind speed. Considering the correlation among nodes’ wind velocities in space, the three-dimensional wind field simulation method for hurricanes was established. Secondly, based on the evolutionary spectrum theory, the non-uniformly modulated evolutionary power spectrum briefly called the evolutionary spectrum was derived, the verification method for hurricane wind field simulation was established. Through comparing the evolutionary spectrum and the simulated spectrum for hurricane, the hurricane wind field simulation results were verified. Finally, a case study of a long-span cable stayed bridge in coastal area was selected. The methods of hurricane wind field simulation and validation were used in the case study. The results showed that using the harmonic synthesis method to update the time- varying mean wind velocity and considering the correlation among nodes’ wind velocities in space, the simulation of hurricane three-dimensional wind field can be realized.
|
|
Received: 19 August 2016
Published: 15 December 2017
|
|
|
|
[1]. Li X L, Xiao Y Q, Kareem A, et al. Modeling typhoon wind power spectra near sea surface based on measurements in the south China sea[J].Journal of Wind Engineering and Industrial Aerodynamics,2012,(104-106):565-576.
[2]. 李春祥,刘晨哲,申建红,等. 土木工程下击暴流风速数值模拟的研究[J].振动与冲击,2010,29(12):49-54.
Li Chun-xiang, Liu Chen-zhe, Shen Jian-hong, et al. Numerical simulations of downburst wind speeds in civil engineering[J]. Journal of Vibration and Shock, 2010,29(12):49-54.
[3]. 张文福,谢丹,刘迎春,等. 下击暴流空间相关性风场模拟[J].振动与冲击,2013,32(10):12-16.
Zhang Wen-fu, Xie Dan, Liu Ying-chun, et al. Simulation of downburst wind field with spatial correlation[J]. Journal of Vibration and Shock, 2013,32(10):12-16.
[4]. 李锦华,吴春鹏,陈水生. 下击暴流非平稳脉动风速数值模拟[J].振动与冲击,2014,33(14):54-60.
Li Jin-hua, Wu Chun-peng, Chen Shui-sheng. Simulation of non-stationary fluctuating wind velocity in downburst[J]. Journal of Vibration and Shock, 2014,33(14):54-60.
[5]. Huang G Q, Zheng H T, Xu Y L, et al. Spectrum models for nonstationary extreme winds[J]. Journal of Structural Engineering, 2015Chen J, Xu Y L. On modeling of typhoon-induced non-stationary wind speed for tall buildings[J].The structural Design of Tall and Special Buildings,2004(13):145-163.
[6]. 李锦华, 李春祥, 申建红. 非平稳脉动风速的数值模拟[J]. 振动与冲击,2009,28(1):18-23.
Li Jin-hua, Li Chun-xiang, Shen Jian-hong. Simulation of non-stationary fluctuating wind velocity[J]. Journal of Vibration and Shock, 2009,28(1):18-23.
[7]. Zhang W. Bridge fatigue damage assessment under vehicle and non-stationary hurricane wind[C]. The 12th Americas Conference on Wind Engineering, Washington, USA, 2013.
[8]. Hu L, Xu Y L. Extreme value of typhoon-introduced non-stationary buffeting response of long-span bridges[J]. Probabilistic Engineering Mechanics,2014(36):19-27.
[9]. 王旭, 黄鹏, 顾明. 台风“梅花”近地风剖面变化[J]. 同济大学学报(自然科学版),2013,41(8):1165-1171.
Wang Xu, Huang Peng, Gu Ming. Variation of wind profiles near ground during typhoon “Muifa”[J]. Journal of TongJi University (Natural Science), 2013,41(8):1165-1171.
[10]. 徐家良, 穆海振. 台风影响下上海近海风场特性的数值模拟分析[J]. 热带气象学报,2009,25(3):281-286.
Xu Jia-liang, Mu Hai-zhen. Numerical simulation and analysis of offshore wind field features in shanghai under the influence of typhoon[J].Journal of tropical meteorollgy,2009,25(3):281-286.
[11]. 李利孝, 肖仪清, 宋丽莉, 等. 基于风观测塔和风廓线雷达实测的强台风黑格比风剖面研究[J]. 工程力学,2012,29(9):284-293.
Li Li-xiao, Xiao Yi-qing, Song Li-li, et al. Study on wind profile of typhoon hagupit using wind observed tower and wind profile radar measurements[J]. Engineering Mechanics,2012,29(9):284-293.
[12]. Chen J, Xu Y L. On modeling of typhoon-induced non-stationary wind speed for tall buildings[J].The structural Design of Tall and Special Buildings,2004(13):145-163
[13]. Huang G Q, Zheng H T, Xu Y L, et al. Spectrum models for nonstationary extreme winds[J]. Journal of Structural Engineering, 2015.
[14]. 李永乐. 风-车-桥系统非线性空间耦合振动研究[D].成都：西南交通大学，2003.
Li Yong-le. Nonlinear three-dimensional coupling vibration of wind-vehicle-bridge system[D].Chengdu: Southwest Jiaotong University,2003.
[15]. Cao S Y, Tamura Y K, Kikuchi N S, et al. Wind characteristic of a strong typhoon[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2009(97):11-21.
[16]. Davenport A G. Gust loading factors[J].Journal of the Structural Division,1967,93(3):11-34
[17]. Shinozuka M, Jan C M. Digital simulation of random processes and its applications[J]. Journal of Sound and Vibration,1972,25(1):111-128.
[18]. Deodatis G. Simulation of Ergodic Multivariate Stochastic Processes[J]. Journal of Engineering Mechanics,1996,122(8):778-787.
|
|
|
|
