Evaluasi Kinerja Struktur Dermaga Yang Terletak Di Kawasan Sekitar Sesar Gempa

Safiraa, Faradina (2025) Evaluasi Kinerja Struktur Dermaga Yang Terletak Di Kawasan Sekitar Sesar Gempa. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Indonesia merupakan negara kepulauan yang berada di jalur ring of fire sehingga menyebabkan Indonesia menjadi negara yang rawan terkena gempa. Di Indonesia sendiri terdapat 2439 pelabuhan, dimana beberapa pelabuhan tersebut berada di jalur sesar. Sehingga diperlukan evaluasi kinerja untuk mendapatkan perilaku struktur ketika terjadi gempa. Beberapa studi yang seperti yang terdapat pada jurnal Seismic Evaluation of Existing Wharf Structures Subject to Earthquake Excitation: Case Study, evaluasi seismik yang dilakukan menggunakan pendekatan yang berbeda seperti standar peraturan yang digunakan, parameter penilaian, maupun analisis pemodelannya. Belum terdapat studi yang khusus membahas mengenai perhitungan analisis kegempaan dengan metode deterministik pada dermaga daerah patahan gempa Tesis ini khususnya membahas mengenai evaluasi kinerja seismik dermaga yang berada pada daerah dekat sesar gempa dengan metode untuk mengestimasi percepatan gempa menggunakan deterministic seismic hazard analysis (DSHA). Tesis ini melakukan site specific analysis untuk mendapatkan analisis perambatan gelombang. Selanjutnya pemodelan kurva pushover dan kurva histeristik untuk mendapatkan perilaku sendi plastis menggunakan software MIDAS. Standar ASCE 61-14 tentang Seismic Design of Piers and Wharves mengatur persyaratan minimum level kinerja untuk setiap level gempa. Tiga macam level gempa yaitu Operating Level Earthquake (OLE), Contigency Level Earthquake (CLE), dan Design Earthquake (DE). Setelah mendapatkan level kinerja, batas regangan/kurvator pada daerah maksimal sendi plastis untuk mengevaluasi kinerja struktur dermaga melalui nilai displacement demand yang diperoleh dari analisis demand dengan Nonlinear Static Demand. Analisis Nonlinear Static Demand dilakukan menurut FEMA 440 Equivalent Linearization Method. Hasil displacement demand yang diperoleh diplot dengan displacement capacity yang diperoleh dari analisis Nonlinear Static Pushover. Dari hasil plotting ini dapat diketahui kinerja struktur dermaga. Hasil dari studi ini adalah struktur dermaga mampu memenuhi kriteria minimal damage dan fully operational untuk berbagai data gempa yang dianalisis, baik pada nilai regangan, nilai perpindahan serta nilai simpangan berada pada batas aman sehingga disimpulkan bahwa dermaga tidak membutuhkan perkuatan struktur.
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Indonesia is an archipelagic nation located along the Ring of Fire, making it highly earthquake-prone. Indonesia has 2,439 ports, some of which are located along fault lines. Therefore, performance evaluation is necessary to determine the behavior of structures during earthquakes. Several studies, such as those published in the journal "Seismic Evaluation of Existing Wharf Structures Subject to Earthquake Excitation: Case Study," conducted seismic evaluations using different approaches, including regulatory standards, assessment parameters, and modeling. No study specifically addresses the calculation of seismic analysis using deterministic methods for piers located in earthquake fault areas. This thesis specifically discusses the seismic performance evaluation of piers located near earthquake faults using a method for estimating earthquake acceleration using deterministic seismic hazard analysis (DSHA). This thesis conducts a site-specific analysis to obtain wave propagation analysis. Furthermore, pushover and hysteristic curve modeling is performed to obtain plastic hinge behavior using MIDAS software. The ASCE 61-14 standard on Seismic Design of Piers and Wharves stipulates minimum performance level requirements for each earthquake level. These three levels are Operating Level Earthquake (OLE), Contingency Level Earthquake (CLE), and Design Earthquake (DE). After determining the performance level, the strain limit/curvature at the maximum plastic hinge area is used to evaluate the performance of the pier structure using displacement demand values obtained from a Nonlinear Static Demand analysis. The Nonlinear Static Demand analysis was conducted according to the FEMA 440 Equivalent Linearization Method. The results of this study indicate that the wharf structure meets the criteria for minimal damage and remains fully operational under various earthquake scenarios analyzed. The evaluated strain values, displacements, and drifts all fall within acceptable safety limits, leading to the conclusion that structural strengthening is not required for the wharf.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Evaluasi Kinerja Struktural, Dermaga, Sesar Baribis–Kendeng, DSHA, Beban Gempa, Seismic Design Structural Performance Evaluation, Pier, Baribis–Kendeng Fault, DSHA,Earthquake Load, Seismic Design
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering)
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D3)
Depositing User:	Faradina Safiraa
Date Deposited:	04 Aug 2025 07:32
Last Modified:	04 Aug 2025 07:32
URI:	http://repository.its.ac.id/id/eprint/125647

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