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Wave Loads Assessment on Coastal Structures at Inundation Risk Using CFD Modelling

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Climate Change and Water Security

Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 178))

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Abstract

Over the past few decades, extreme phenomena have raised concern due to their severity and increasing risks to inhabitants, infrastructures, and anthropic activities. Nowadays, coastal structures overtopping, beaches erosion and destruction of infrastructures are common along the coasts around the world. It is of crucial importance to anticipate those impacts in order to efficiently contribute to their mitigation and adopt efficient defense measures. In a previous experimental work based on a large-scale physical model, the relationship between the air gap of an elevated coastal structure on top of wooden piers and the resulting horizontal and vertical wave forces were studied for different wave load conditions. These experimental results serve as calibration data for a numerical model to simulate the fluid/structure interaction, using CFD tools. Three scenarios were simulated with different heights of the air gap between the water and the structure base levels, for a given wave condition. When the numerical results are compared with the physical model results, the maximum values of the horizontal and vertical forces, obtained numerically are satisfactory, with an average relative difference of 14.4% and 25.4%, respectively. In addition, a numerical model at full scale was applied, to simulate the pressures and shear stresses that act on the piers that support the structure, considering different heights of the air gap and assessing the respective CPU simulation times. This way the operational modelling capabilities of the CFD model were assessed to determine the forecast leading time restrictions for eventual use within an early warning system.

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Acknowledgements

The authors would like to thank the EcOffShorBE, Eco Offshore Built Environment, NORTE-01-0247-FEDER-037417 project, for the support given to this study, enabling the development and application of numerical simulation tools to characterize marine structures loads.

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Authors and Affiliations

  1. Department of Civil Engineering, CTAC, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal

    Ana Gomes & José Pinho

Authors
  1. Ana Gomes
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  2. José Pinho
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Corresponding author

Correspondence to Ana Gomes .

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Editors and Affiliations

  1. Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal, India

    Sreevalsa Kolathayar

  2. Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, India

    Arpita Mondal

  3. Department of Civil and Environmental Engineering, National University of Singapore, Singapore, Singapore

    Siau Chen Chian

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Gomes, A., Pinho, J. (2022). Wave Loads Assessment on Coastal Structures at Inundation Risk Using CFD Modelling. In: Kolathayar, S., Mondal, A., Chian, S.C. (eds) Climate Change and Water Security. Lecture Notes in Civil Engineering, vol 178. Springer, Singapore. https://doi.org/10.1007/978-981-16-5501-2_17

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  • DOI: https://doi.org/10.1007/978-981-16-5501-2_17

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-16-5500-5

  • Online ISBN: 978-981-16-5501-2

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