Journal
OCEAN ENGINEERING
Volume 248, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2022.110739
Keywords
Coastal bridge; Box-girder superstructure; Wave forces; Analytical method
Funding
- National Natural Science Foundation of China [52008065, 41472262]
- National natural science foundation of China-China railway corporation high-speed railway basic research joint fund project [U1834207]
- Postdoctoral Research Foundation of China [2020M683229]
- General Project of Chongqing Natural Science Foundation [cstc2021jcyj-msxmX1082]
- Chongqing Municipal Education Commission Science and Technology Research Project [KJQN202000706]
- Venture and Innovation Support Program for Chongqing Overseas Returnees [cx2020104]
- Key Project of National Key Research and Development Project [2016YFC0802206-3]
- Program for Innovation Team Building at Institutions of Higher Education in Chongqing [CXQT19021]
- High-Level Technical Personnel Training Project of Transportation Industry
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This paper proposed an analytical method to estimate random wave forces on the box-girder superstructure and validated its accuracy. The study found that structural parameters significantly affect the horizontal wave forces on the submerged box-girder superstructure, and a larger ratio of wavelength to width results in smaller horizontal wave forces.
The hydrodynamic performance of the box-girder superstructure under extreme random wave conditions in the actual ocean environment is the focus of coastal bridge designers and researchers. This paper proposed an analytical method to estimate random wave forces on the box-girder superstructure based on the potential flow theory and the correction parameters. The accuracy of the proposed analytical method is validated by the classical problem about the wave force on the rectangular structure, empirical methods proposed by previous researchers, and the hydrodynamic experiment conducted by authors on the wave force of the box-girder superstructure within the application range of the proposed method. With the validated analytical method, a parametric study is carried out to explore the influence of the peak frequency of the incident wave spectra and the structural configuration on the hydrodynamic performance of the submerged box-girder superstructure. Results show that the structural parameter, including the relative deck thickness, girder width, and girder height of the box-girder superstructure affects the horizontal wave force more significantly than the vertical wave force. A larger ratio of wavelength to the width of the box-girder superstructure results in smaller horizontal wave forces when the dimensionless wave number is smaller than 1.0. It is of great significance to consider the effect of actual ocean waves on coastal bridge superstructures using random waves.
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