Modifikasi Gedung Fasilitas Pendidikan 5 Lantai Di Surabaya Menggunakan Sistem Isolasi Dasar High Damping Rubber Bearing

Rahmayanti, Naura Meidia (2026) Modifikasi Gedung Fasilitas Pendidikan 5 Lantai Di Surabaya Menggunakan Sistem Isolasi Dasar High Damping Rubber Bearing. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Menurut data dari Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) tahun 2023, terdapat total 10.789 kali aktivitas gempa di Indonesia dengan gempa bermagnitudo di atas 5,0 sebanyak 219 kali. Gempa bumi dapat menimbulkan kerusakan pada bangunan, baik pada elemen struktural maupun pada elemen non-struktural. Salah satu langkah efektif yang dapat digunakan untuk mengatasi gempa bumi ini adalah sistem isolasi dasar atau base isolation (Vetturayasudharsanan dkk., 2023). Pada studi ini dilakukan modifikasi struktur Gedung Pendidikan 5 Lantai di Surabaya dengan menggabungkan sistem isolasi dasar High Damping Rubber Bearing (HDRB) untuk menggantikan mekanisme penahan gempa konvensional pada sistem fixed-base. Tujuan utama dari studi ini adalah untuk membandingkan kinerja struktur, kebutuhan volume material, dan biaya material antara sistem fixed-base dengan sistem isolasi dasar. Struktur eksisting fixed base menggunakan Sistem Rangka Pemikul Momen Khusus (SRPMK), sedangkan struktur modifikasi base isolation menggunakan Sistem Rangka Pemikul Momen Khusus (SRPMB). Pemodelan dilakukan dengan software ETABS dan verifikasi respons isolator dilakukan melalui Time History Analysis. Hasil menunjukkan bahwa penerapan base isolation meningkatkan periode alami struktur sebesar 113,1% pada mode pertama. Rasio partisipasi massa modal pada mode awal struktur base isolated menjadi sangat dominan, yaitu 90%, sedangkan pada struktur fixed base hanya sekitar 81,7%. Pengurangan pada story drift mencapai nilai rata-rata 53,8% pada arah x dan 61,9% pada arah y. Sedangkan, percepatan atap turun hingga rata-rata sebesar 51,45%. Dari aspek material, kebutuhan beton meningkat 34,59%, sedangkan besi tulangan berkurang 2,57%. Meskipun begitu, struktur dengan base isolation menunjukkan kinerja struktur yang lebih baik dan dapat mempertahankan sifat elastis struktur saat terjadi gempa besar, sehingga dapat meminimalkan kerusakan, berbeda dengan fixed base yang didesain mengandalkan daktilitas struktur untuk menyerap energi gempa.
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According to data from the Meteorological, Climatological, and Geophysical Agency (BMKG) in 2023, Indonesia experienced a total of 10.789 earthquake events, including 219 earthquakes with magnitudes greater than 5,0. Earthquakes can cause damage to buildings, affecting both structural and non-structural elements. One effective approach to mitigate seismic impacts is the implementation of a base isolation system (Vetturayasudharsanan et al., 2023). This study investigates the modification of a five-story educational building in Surabaya by incorporating a High Damping Rubber Bearing (HDRB) base isolation system to replace the conventional fixed-base seismic resisting mechanism. The primary objective of this study is to compare the structural performance, material quantities, and material costs between the fixed-base system and the base-isolated system. The existing fixed-base structure employs a Special Moment Resisting Frame (SMRF), while the modified base-isolated structure utilizes an Ordinary Moment Resisting Frame (OMRF). Structural modeling was carried out using ETABS, and the performance of the isolation system was verified through Time History Analysis. The results indicate that the implementation of base isolation increased the fundamental natural period of the structure by 113,1% in the first mode. The modal mass participation ratio in the first mode of the base-isolated structure became highly dominant, reaching 90,0%, whereas that of the fixed-base structure was only 81,7%. The average reduction in story drift reached 53,8% in the x-direction and 61,9% in the y-direction. In addition, the average peak roof acceleration decreased by 51,45%. In terms of material consumption, the concrete volume increased by 34.59%, while the quantity of reinforcing steel decreased by 2,57%. Nevertheless, the base-isolated structure exhibited superior structural performance and was able to maintain elastic behavior during major earthquake events, thereby minimizing structural damage. In contrast, the fixed-base structure was designed to rely on structural ductility to dissipate seismic energy.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Sistem Isolasi Dasar, High Damping Rubber Bearing (HDRB), Gedung Beton Bertulang, Analisis Time History, Base Isolation System, High Damping Rubber Bearing (HDRB), Reinforced Concrete Building, Time History Analysis
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA444 Reinforced concrete T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TH Building construction > TH1095 Earthquakes and building
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Naura Meidia Rahmayanti
Date Deposited:	28 Jul 2026 02:11
Last Modified:	28 Jul 2026 02:11
URI:	http://repository.its.ac.id/id/eprint/138279

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