Effect of building overtopping on induced loads during extreme hydrodynamic events

Wüthrich, Davide (Laboratory of Hydraulic COnstructions (LCH), EPFL, Lausanne, Switzerland) ; Pfister, Michael (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Nistor, Ioan (Department of Civil engineering, University of Ottawa, Ottawa, Canada) ; Schleiss, Anton J. (Laboratory of Hydraulic Constructions (LCH), EPFL, Lausanne, Switzerland)

Tsunamis, impulse-waves and dam-break waves have affected humanity in recent decades and the construction of vertical shelters can provide safety to people. However, for non-critical infrastructures, typically residential houses of lower height, overtopping is accepted during such events. This study experimentally quantifies the effect of building overtopping, i.e. water flowing over the roof, on the resulting loading process. Both surges and bores were investigated and the impact against buildings with two different heights was assessed. Detailed measurements of forces and moments allowed key differences to be captured between the scenarios with and without overtopping. Results showed that overtopping induced higher downstream water depths, leading to lower horizontal forces and a reduced resistance coefficient. Furthermore, cantilever arm, moment and impulse values were constantly lower in case of overtopping. Finally, this study presents an innovative methodology to assess the main loading features of buildings subject to overtopping, supporting engineers to design safer resilient structures.


Keywords:
Article Type:
scientifique
Faculty:
Ingénierie et Architecture
School:
HEIA-FR
Institute:
iTEC - Institut des technologies de l'environnement construit
Date:
2019-03
Pagination:
17 p.
Published in:
Journal of Hydraulic Research
DOI:
ISSN:
0022-1686
Appears in Collection:

Note: The status of this file is: restricted


 Record created 2019-10-08, last modified 2019-10-08

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