Impact Pressure and Forces on a Vertical Wall with Different Types of Parapet
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 147, Issue 3
Abstract
This paper will discuss the variations in wave loads on a vertical seawall structure due to the addition of parapets. A 1:8 model scale experiments on a wall with parapets will be carried out. The models will be tested for monochromatic waves that have different breaking characteristics that are identified based on the amount of air entrapped during breaking. These include slightly-breaking waves (SBW), breaking waves with small air trap (BWSAT), and breaking waves with large air trap (BWLAT). The relative reduction in impact pressure will be used to quantify parapet performance. This paper revealed that with the addition of a parapet, wave force increases compared to a vertical wall (VW) until incident wave height [(Hi < 0.125 m)]. However, with further increases in wave height (H), the wave force reduces for large (LP) and medium parapets (MP) compared with a small parapet (SP). The exit angle of the parapet plays a vital role to decrease the wave loads for higher H; the extent of the decrease is dictated by the movement of deflected water. Based on the tested parapets and wave characteristics, an LP (45°) attracted less load on the overall structure compared with other parapet types for higher Hi (Hi > 0.125 m).
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors would like to express the gratitude to DST-SERB for their extramural funding for performing experiments and research. The authors would like to thank the two anonymous reviewers for their critical comments and suggestions.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 147 • Issue 3 • May 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: May 12, 2020
Accepted: Dec 15, 2020
Published online: Mar 8, 2021
Published in print: May 1, 2021
Discussion open until: Aug 8, 2021
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