Tsunami Scour and Forces at Onshore Structures

Conference paper


McGovern, D., Rossetto, T. and Todd, D. (2019). Tsunami Scour and Forces at Onshore Structures. Coastal Structures Conference 2019. Hannover 30 Sep 2019 - 02 Nov 2020 https://doi.org/10.18451/978-3-939230-64-9_051
AuthorsMcGovern, D., Rossetto, T. and Todd, D.
TypeConference paper
Abstract

Tsunami induced scour at onshore coastal structures can cause exposure of the foundations
and lead to failure. This paper presents experimental observations of a 147 s crest-led wave
inundation, causing scouring and loading on 0.2 m wide square and 0.4 m wide rectangular onshore
structures. At 1:50 Froude scale these equate to a 17.3 min inundation at 10 and 20 m wide structures.
Scour development is measured using GoPro cameras situated inside the Perspex structures. The
hydrostatic load is calculated from the integration of pressure readings along the front face of the
structures, and the hydrodynamic loading is estimated from the approach flow velocity, as measured
by a Vectrino II profiler. The results show that the maximum scour depth occurs during the inundation
before significant slumping decreases the end scour depth. Both the in-test and final scour depths for
the 0.4 m structure are greater, due to the larger blockage causing greater acceleration of the flow
around the structure. For both structures, the hydrostatic loading is dominant over hydrodynamic load.

Year2019
Digital Object Identifier (DOI)https://doi.org/10.18451/978-3-939230-64-9_051
Accepted author manuscript
License
File Access Level
Controlled
Publisher's version
License
File Access Level
Open
Publication dates
Print30 Sep 2019
Publication process dates
Accepted30 Sep 2019
Deposited17 Nov 2020
Web address (URL) of conference proceedingshttps://henry.baw.de/handle/20.500.11970/106481
Permalink -

https://openresearch.lsbu.ac.uk/item/8v3zv

Download files


Publisher's version
051_Coastal_Structures_2019.pdf
License: CC BY 4.0
File access level: Open

  • 7
    total views
  • 4
    total downloads
  • 3
    views this month
  • 0
    downloads this month

Export as

Related outputs

Experimental observations of tsunami induced scour at onshore structures
McGovern, D, Todd, D, Rossetto, T, Whitehouse, RJS, Monaghan, J and Gomes, E (2019). Experimental observations of tsunami induced scour at onshore structures. Coastal Engineering. 152, p. 103505. https://doi.org/10.1016/j.coastaleng.2019.103505
Pneumatic Long-Wave Generation of Tsunami-Length Waveforms and their Runup
McGovern, D, Robinson, T, Chandler, ID, Allsop, W and Rossetto, T (2018). Pneumatic Long-Wave Generation of Tsunami-Length Waveforms and their Runup. Coastal Engineering. 138, pp. 80-80. https://doi.org/10.1016/j.coastaleng.2018.04.006
Tsunami Simulators in Physical Modelling – Concept to Practical Solutions
McGovern, D (2017). Tsunami Simulators in Physical Modelling – Concept to Practical Solutions. European Geophysical Union. Vienna 23 - 27 Apr 2017 London South Bank University.
Understanding wave generation in pneumatic tsunami simulators
McGovern, D (2016). Understanding wave generation in pneumatic tsunami simulators. 6th International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science. Ottawa, Canada 10 - 13 May 2016 London South Bank University.
Experimental Study of the Runup of Tsunami Waves on a smooth Sloping Beach
McGovern, D (2016). Experimental Study of the Runup of Tsunami Waves on a smooth Sloping Beach. 6th International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science. Ottowa, Canada 10 May - 13 Jul 2016
Experiments on Tsunami Impact with a Vertical Sea Wall
McGovern, D, Robinson, T and Rossetto, T (2016). Experiments on Tsunami Impact with a Vertical Sea Wall. 1st International Conference on Natural Hazards & Infrastructure. Chania, Greece 28 - 30 Jun 2016
Response of small sea ice floes in regular waves: A comparison of numerical and experimental results
Bai, W, Zhang, T and McGovern, D (2016). Response of small sea ice floes in regular waves: A comparison of numerical and experimental results. Ocean Engineering. 129, pp. 495-506. https://doi.org/10.1016/j.oceaneng.2016.10.045
Experimental study on kinematics of sea ice floes in regular waves
McGovern, D and Bai, W (2014). Experimental study on kinematics of sea ice floes in regular waves. Cold Regions Science and Technology. 103, pp. 15-30. https://doi.org/10.1016/j.coldregions.2014.03.004
Time Development of Scour around a Cylinder in Simulated Tidal Currents
McGovern, D, Ilic, S, Folkard, AM, McLelland, SJ and Murphy, BJ (2014). Time Development of Scour around a Cylinder in Simulated Tidal Currents. Journal of Hydraulic Engineering. 140 (6), pp. 04014014-04014014. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000857
Experimental study of wave-driven impact of sea ice floes on a circular cylinder
McGovern, D and Bai, W (2014). Experimental study of wave-driven impact of sea ice floes on a circular cylinder. Cold Regions Science and Technology. 108, pp. 36-48. https://doi.org/10.1016/j.coldregions.2014.08.008