Author(s): Maximilian Herbst; Nils B. Kerpen; Talia Schoonees; Torsten Schlurmann

Linked Author(s):

Keywords: Coastal structures; Stepped revetment; Scale effects; Impact pressures; Physical model test; Large scale

Abstract: Stepped revetments have shown to be effective in limiting wave overtopping and wave run-up compared to sloped revetments. However, literature on wave impact pressures and comprehensive design guidelines for these structures is scarce. Laboratory experiments support establishing design recommendations. So far, studies for wave impacts at stepped revetments were mainly performed at small scales. Results from these tests are likely to be subjected to scale effects and therefore inaccurately replicate the wave-structure interaction at full scale. This study quantifies scale effects of wave impact characteristics for design cases based on a comparison to small-scale tests (Kerpen et al., 2018). Full-scale flume experiments were studied with a slope of 1:3 and uniform step heights of 0.17 m and 0.50 m in the Large Wave Flume (GWK) in Hannover, Germany. Horizontal and vertical wave impacts were measured at 15 locations in the plunging region of the revetment for a range of wave steepnesses (2.0 ≤

DOI: https://doi.org/10.59490/coastlab.2024.761

Year: 2024