A model study on the stability of rubble mound coastal defense structure


Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2011

Öğrenci: KEMAL CİHAN ŞİMŞEK

Danışman: AHMET CEVDET YALÇINER

Özet:

Coastal regions are very important because they provide a lot of resources and benefits for all the humankind. Coastal defense structures protect coastal regions from wave attacks. However, the cost of construction such coastal defense structures are very high and need big investments. Hence, to reach the optimum design and minimize the risk of failure has vital importance during the design stage of these structures. Model studies are the most effective tool in optimizing the design of these structures. Rubble mound coastal defense structures were constructed with assembly of different sizes of armor stones and front slopes. Rubble mound coastal defense structures were designed by Van der Meer‟s approach and the stability of the cross sections were tested on the models constructed with a scale of 1:33.485 in the Coastal and Harbor v Engineering Laboratory, Civil Engineering Department, Middle East Technical University. Results of the model studies showed that structures with steep slopes were damaged more than structures with mild slopes and the stability of the structures were directly affected by the armor stone sizes. In the model studies, different cross sections were tested for stability to obtain the cumulative damages under severe storm conditions. These cumulative damages, which are obtained by stone count method, are converted to the damage parameters, Sd, to compare with the existing studies. It was observed that the results of the stability formulae of Van der Meer for shallow water were very consistent with the results of model studies as they were designed according to Van der Meer approach.