An experimental study for estimating tsunami wave forces acting on building with seaward and landward macroroughness

Moon, Wei Chek; Chiew, Lerk Qing; Cheong, Kah Win; Tee, Yi Cong; Chun, Jan Bong; Lau, Tze Liang

doi:10.1016/j.oceaneng.2019.106116

Cited by 17 publications

(3 citation statements)

References 16 publications

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“…10(a and b) and 11(a and b)]. Similar results have been found for maximum force reduction (Simamora et al 2007;Nakamura et al 2010;Ardianti et al 2015;Yang et al 2018;Sogut et al 2019;Moon et al 2019;Moris et al 2021), maximum pressure reduction (Tomiczek et al 2016), and observed damage reduction (Tomiczek et al 2017;Hatzikyriakou et al 2016;Dall'Osso et al 2010, 2016Izquierdo et al 2018;Reese et al 2011) in building arrays. Our results present, for the first time, to our knowledge, the decay of the applied debris loading in a building array for a coastal inundation event, showing that there is a compounded sheltering effect in the building array, owing to (1) a lower CR; (2) a lower number of multiple collisions q; and (3) lower I 0,x and I (2nd) 0,x as the row number increases.…”

Section: Collision Magnitude and Its Distribution Within The Building...supporting

confidence: 79%

“…These arrangements, also referred to as structural arrays, will affect the flow conditions, influencing inundation levels and flow velocities, and consequently affecting waterborne debris loading. Evidence of flow disturbance through the presence of structural arrangements has been found in fieldwork (Reese et al 2007;Leone et al 2011;Hatzikyriakou et al 2016), laboratory tests (Simamora et al 2007;Rueben et al 2011;Park et al 2013;Goseberg 2013;Thomas et al 2015;Nouri et al 2010;Tomiczek et al 2016;Moon et al 2019;Moris et al 2021), and numerical experiments (Nakamura et al 2010;Ardianti et al 2015;Yang et al 2018;Sogut et al 2019;Moris et al 2021).…”

Section: Debris Loading On Building Arraysmentioning

confidence: 96%

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Wave–Current Impulsive Debris Loading on a Coastal Building Array

Moris

Burke

Kennedy

et al. 2023

J. Waterway, Port, Coastal, Ocean Eng.

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Waterborne debris impacts during inundation events are a widely observed threat to structures in coastal communities. This study investigates the probability of impact and magnitude of wave-current (N = 1,170) and current-only (N = 156) debris events on exposed and sheltered buildings within a 10 × 10 building array, using laboratory measurements of structural loading response, flow hydrodynamics, and video recordings of flow transport and impact. A methodology based on a structural system with a single degree of freedom is implemented to estimate the applied debris impulse from collisions and to investigate the dynamic impact of waterborne debris on structures. Results show that the debris collision probability varies greatly, between 42% for unsheltered rows and 2% for nine rows of sheltering. Given a collision, the normalized debris impulse in sheltered buildings is at maximum 0.8 times the impulse for unsheltered conditions, and this reduction increases as the number of sheltering rows increases. Using empirical exceedance probabilities of the applied debris impulse, a framework is developed to estimate the maximum structural loading response within a building array, along with a comparison with data and existing standards. The effect of the impact duration on the relation between the applied debris impulse and the maximum structural response is also discussed.

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Section: Collision Magnitude and Its Distribution Within The Building...supporting

confidence: 79%

Section: Debris Loading On Building Arraysmentioning

confidence: 96%

Wave–Current Impulsive Debris Loading on a Coastal Building Array

Moris

Burke

Kennedy

et al. 2023

J. Waterway, Port, Coastal, Ocean Eng.

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“…The comparison showed that generally the design codes' total force estimations over and under-estimated the test results for nonbreaking and breaking waves, respectively. Moon et al (2019) experimentally investigated the seaward (front) and leeward (rear) face pressures on macro-roughness elements caused by nonovertopping and overtopping wave flows. The physical testing outcomes indicated that the seaward macro-roughness significantly influenced the front and back face pressures.…”

Section: Introductionmentioning

confidence: 99%

Influence of Orientation and Arrangement of Structures on Tsunami Impact Forces: Numerical Investigation with Smoothed Particle Hydrodynamics

Pringgana

Cunningham

Rogers

2021

J. Waterway, Port, Coastal, Ocean Eng.

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This paper explores the influence of onshore structures' orientations and arrangements during tsunami impact using the numerical method of smoothed particle hydrodynamics (SPH). Observations from previous tsunami events often reveal variation in the damage and survivability of impacted similar structures. Such variation can be due to shielding effects and other interactions that occur when the tsunami wave is incident upon an urbanised location. The SPH model used in this work was first validated against previous experimental results and was then used to explore the resulting hydrodynamic behaviour to a level of detail hitherto unobtainable from physical experiments. Groups of three and five structures were modelled with varying spatial separation and orientation to the incoming tsunami bore, characterised by the wake clearance angle (A) and the rotation angle (R), respectively. The results reveal significant reductions in total force on a structure can be made via strategic spatial positioning and orientation. Such reductions may mean the difference between superficial damage and wholesale structural collapse and allow the development of more resilient structures in tsunami-prone regions.

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