In this paper, a set of experiments on the breaking wave impact on the vertical wall attached with recurve parapets is being carried out. This paper discusses the experimental setup and test cases released for the comparative study in the ISOPE 2022. The paper discusses the comprehensive details of the experimental setup, details of model, instrumentation and Data Acquisition (DAQ) and wave characteristics of small-scale and large-scale experiments. Different test cases with varying wave height and wave periods are investigated to put forth the effect of the curvature of recurved parapets and the results are reported in this paper.
As global warming worsens, existing vertical walls struggle to withstand the effect of overtopping, increasing the risk on the leeward side. One alternative solution followed by coastal engineers is to attach a recurve on top of the existing vertical wall or build a monolithic recurve wall. Recurved parapets are an overhang structure facing the seaward side attached to the new/existing vertical seawall to overcome higher wave heights during extreme events and the rise in sea level. The efficiency of this part is that it takes up-rushing seawater or higher steepness waves to curl around the structures and deflects back into the seaward side instead of overtopping. It is required to develop tools for assessing the reliability and survivability of these structures in the presence of extreme loads, such as those applied by breaking waves.
The critical parameters for the design of coastal structures are wave impact pressure and force. The current research looks at how parapets affect the vertical wall's hydrodynamic characteristics and wave loading patterns. The study involves the determination of the performance of vertical walls attached with different recurved parapets.
The study of the impact pressure is a vast topic carried out by more than hundreds of researchers. Impact pressure is a short-range impulsive pressure act when a wave hits on the structure. Impact pressures are ten times higher than non-impact forces, and their impact duration is less than 1/100th of the characteristic wave period (Zhou et al., 1991). Impact pressures are highly stochastic and difficult to understand and interpret (Cuomo et al., 2010a). Localised impact occurs over a small portion of the entire system, causing major changes in position (Chan, 1994).
