Numerical prediction of solitary wave forces on a typical coastal bridge deck with girders
Numerical prediction of solitary wave forces on a typical coastal bridge deck with girders
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DOI：
10.1080/15732479.2016.1158195
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发表时间：
2017-02
影响因子：
3.7
通讯作者：
Guoji Xu;C. Cai;L. Deng
中科院分区：
文献类型：
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作者：
Guoji Xu;C. Cai;L. Deng
摘要在这项研究中，一个典型的沿海桥梁桥面梁上的孤波力预测的数值方法，以获得一种替代的方式来评估孤波力的沿海桥梁桥面具有足够的精度。首先，采用基于孤立波理论的波浪模型描述海啸的入射波，并采用剪切应力输运k-ω模型作为雷诺平均Navier-Stokes模型方程的湍流封闭。然后，数值波浪剖面和预测的波浪力进行了比较，分别与解析解和报告的实验室测量。这些验证确保了以下参数研究的结果可靠。最后，数值结果和那些通过经验方法获得的比较进行，以检查这些经验程序对这个特定的情况下的适当性。此外，提出了一个扩展的公式与关键参数的定义进行讨论。这种方法可以扩展到不同的甲板横截面的情况下，而不是在本研究中使用的典型的一个被认为是不同的波参数的情况下。希望扩展后的公式能为实际工程师提供直观而可取的结果。
Abstract In this study, a numerical method for predicting solitary wave forces on a typical coastal bridge deck with girders is utilised in order to obtain an alternative way to assess solitary wave forces on coastal bridge decks with sufficient accuracy. Firstly, a wave model based on the solitary wave theory representing the incident wave of tsunamis is applied through a computational fluid dynamics computer program, where the shear stress transport k-ω model is adopted as the turbulent closure for the Reynolds Averaged Navier–Stokes model equations. Then, the numerical wave profiles and the predicted wave forces are compared with the analytical solutions and the reported laboratory measurements, respectively. These verifications assure the results in the following parametric study reliable. Finally, comparisons between the numerical results and those acquired through the empirical methods are conducted in order to examine the appropriateness of these empirical procedures regarding this specific case. Furthermore, an expanded formula is proposed with the definitions of the key parameters being discussed thereafter. This method can be expanded to cases where different deck cross sections rather than the typical one used in the present study are considered and to scenarios where different wave parameters are involved. It is hoped that the expanded formula could provide straightforward but advisable results for practicing engineers.