Modeling and simulation of bridge-section buffeting response in turbulent flow
Modeling and simulation of bridge-section buffeting response in turbulent flow
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DOI：
10.1142/s0218202519410045
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发表时间：
2019-05
影响因子：
3.5
通讯作者：
T. A. Helgedagsrud;Y. Bazilevs;K. Mathisen;Jinhui Yan;Ole A. Øseth
中科院分区：
文献类型：
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作者：
T. A. Helgedagsrud;Y. Bazilevs;K. Mathisen;Jinhui Yan;Ole A. Øseth
抖振分析在大跨度桥梁抗风设计中起着重要的作用。虽然计算方法已广泛应用于桥梁截面自激力的研究，但将先进的仿真方法应用于抖振分析的工作却很少。为了解决这一缺点，我们开发了一个框架，用于桥梁部分遭受湍流的抖振模拟。对宽高比为10的矩形桥梁截面进行了仿真，计算了其气动导纳函数。模拟结果与翼型理论和实验结果吻合较好。研究发现，入流湍流对获得准确的桥段风荷载起着重要作用。所提出的方法有望在未来的结构风工程中产生实际影响。
Buffeting analysis plays an important role in the wind-resistant design of long-span bridges. While computational methods have been widely used in the study of self-excited forces on bridge sections, there is very little work on applying advanced simulation to buffeting analysis. In an effort to address this shortcoming, we developed a framework for the buffeting simulation of bridge sections subjected to turbulent flows. We carry out simulations of a rectangular bridge section with aspect ratio 10 and compute its aerodynamic admittance functions. The simulations show good agreement with airfoil theory and experimental observations. It was found that inflow turbulence plays an important role in obtaining accurate wind loads on the bridge sections. The proposed methodology is envisioned to have practical impact in wind engineering of structures in the future.