ASSESSMENT OF STORM DAMAGED BREAKWATER AND REINFORCED CROSS-SECTION

Date

2025-8-18

Author

Gökdağ, Ayşenur

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This study consists of two main parts for the examination of the stability of rubble mound breakwaters under extreme wave conditions. The first part aims to generate irregular wave time series to reproduce the storm event on 18-19 January 2018 that caused the failure of a breakwater along a port located on the southwestern coast of the Black Sea of Türkiye. A continuous time series generation method was utilized in which storm evolution was presented more uniformly. According to the Monte Carlo simulation, this method improved the capture of extreme wave heights ((Hmax)mean) by approximately 4%, enabling more accurate small-scale model replication of storm conditions. The second part replicates the observed failure mechanism by physical model experiments at METU Civil Engineering Department, Coastal and Ocean Engineering Laboratory. Field investigations identified major movement of crown wall units and severe scour at the rear side. These results enabled a more detailed evolution of the failure process, giving some indication of the sensitivity of design parameters such as crest stone size, and the difficulties involved in producing real-life damage mechanism in the laboratory. Besides those two main parts, a limited supplementary study on an alternative design of the reinforced cross-section of the damaged breakwater was performed. In the original reinforced cross-section design, Antifer blocks were placed directly on top of the existing Tetrapods in the armor layer without any filter in between. In this study, an alternative reinforcement design is considered, in which a filter layer is added between the two armor units. The alternative design was tested under the same wave conditions as the original reinforced design, and the cross-section performance was compared.

Subject Keywords

Irregular Time Series Generation, Rubble Mound Breakwater, Crown-Wall, Failure Mechanism, Reinforcement

URI

https://hdl.handle.net/11511/115542

Collections

Graduate School of Natural and Applied Sciences, Thesis