Analisis Stabilitas Artificial Reefs Tipe Hexagonal

Hanif, Muhammad Rifqi (2022) Analisis Stabilitas Artificial Reefs Tipe Hexagonal. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam menyelesaikan permasalahan abrasi dan juga menjaga ekosistem laut yang ada, maka perlu dimunculkan suatu ide yaitu struktur penahan energi gelombang yang juga mampu sebagai tempat habitat biota-biota laut. Oleh karena itulah pada penelitian ini diujikan terumbu karang buatan (artificial reefs) yang dianggap mampu menyelesaikan persoalan-persoalan tersebut ditambah lagi perannya yang sekaligus merehabilitasi kerusakan ekosistem terumbu karang. Pemecah gelombang terumbu dirancang untuk memungkinkan limpasan gelombang dan transmisi serta beberapa pergerakan batu dan deformasi struktur selama persyaratan perlindungan pantai terpenuhi. Fleksibilitas desain artificial reefs ini dapat mengurangi biaya struktur; namun kinerja hidrolik dan struktural pemecah gelombang terumbu harus diprediksi dengan baik. Adapun pada penelitian ini akan diuji artificial reefs dengan tipe hexagonal. Dipilih bentuk hexagonal karena secara hidraulik dipandang lebih stabil dan lebih baik dibanding bentuk artificial reefs lain yang ada (misal silinder, piramid, kubus). Nilai KD dari artificial reefs didapatkan dengan menggunakan rumus Hudson. Akhirnya, hasil pengujian stabilitas variasi kemiringan 11.2° dari artificial reefs dibandingkan dengan hasil pengujian stabilitas kubus dengan berat dan kemiringan yang sama. Sehingga didapatlah KD hexareef sebesar 25.425. Pengaruh tinggi dan periode gelombang yang besar akan membuat persentase kerusakan pada hexareef juga semakin besar. Begitu pula dengan model susunan yang disusun tumpuk ke atas juga mengakibatkan hexareef semakin tidak stabil.
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In solving the problem of abrasion and also maintaining the existing marine ecosystem, it is necessary to come up with an idea as a structure to reduce the wave energy and also capable of being a habitat for marine biota. Therefore, in this experiment, artificial reefs were tested which are considered capable of solving these problems, plus their role at the same time rehabilitating damaged coral reef ecosystems. Reefs can also be said to be a structure that consists of homogeneous rock piles of sufficient weight to withstand wave attack. Breakwaters are designed to allow wave runoff and transmission as well as some rock movement and structural deformation as long as shore protection requirements are met. The design flexibility of these artificial reefs can reduce the cost of the structure; however, the hydraulic and structural performance of the reef breaker must be well predicted. In this study, artificial reefs with a hexagonal type will be tested. The hexagonal shape was chosen because it is considered hydraulically more stable and better than other existing artificial reef shapes (eg cylinder, pyramid, cube). The KD value of artificial reefs is obtained using the Hudson formula. Finally, the results of the 11.2° inclination test of the artificial reef were compared with the results of the cube test with the same weight and slope. So that the KD hexareef is 25.425. The effect of high and large wave periods will make the percentage of damage to the hexareef also greater. Likewise, the arrangement model compiled above also causes the hexareef to become more unstable.

Item Type:	Thesis (Masters)
Additional Information:	RTKe 627.24 Han a-1 2022
Uncontrolled Keywords:	terumbu karang buatan, artificial reefs, stabilitas, submerged breakwater, breakwater. artificial reefs, stability, submerged breakwater, breakwater.
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38101-(S2) Master Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	06 Jul 2026 02:57
Last Modified:	06 Jul 2026 02:57
URI:	http://repository.its.ac.id/id/eprint/134328

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