Fadli, Muhammad Rifki (2024) Evaluasi Kinerja Seismik pada Struktur Gedung Bertingkat 12 Lantai di Surabaya Menggunakan Base Isolation tipe Friction Pendulum System Dengan Analisis Nonlinear Time History. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Seiring dengan peningkatan aktivitas seismik yang salah satunya ditandai dengan pengingkatan sesar aktif sebesar 450% dari tahun 2010 ke tahun 2017. Kebutuhan akan bangunan tahan gempa merupakan sebuah hal yang harus terpenuhi, khususnya untuk daerah dengan tingkat kerawanan gempa tinggi seperti di Surabaya yang diapit oleh dua sesar aktif. Terbatasnya kemampuan evakuasi diri penghuni gedung tinjauan menjadi pertimbangan untuk melakukan analisis lebih lanjut guna melindungi manusia dari adanya bencana alam. Pada tugas akhir ini akan dibahas bagaimana perbandingan struktur yang biasa digunakan(fixbase) dengan struktur isolasi (base isolation) tipe Friction Pendulum System (FPS), untuk mengetahui seberapa jauh base isolation bekerja terhadap perilaku bangunan. Penelitian ini bertujuan mengetahui perbandingan tulangan struktur primer, gaya geser dasar, displacement, inter-story drift, level kinerja, dan pola keruntuhan struktur gedung fixbase dengan struktur base isolation. Diambil studi kasus Gedung C RS UPT Vertikal yang berada di wilayah gempa tinggi yaitu Surabaya. Untuk mengetahui kinerja struktur jika terkena gempa dilakukan analisis Nonlinear Time History (NLTHA).
Berdasarkan hasil analisis didapatkan bahwa struktur dengan base isolation memiliki periode lebih besar 2,5 kali dari struktur fixed base. Struktur base isolation dengan nilai koefisien modifikasi respon (R=2) memiliki gaya geser dasar yang lebih kecil dibandingan dengan struktur fixed base yang menggunakan nilai koefisien modifikasi respon (R=8) dengan selisih sebesar 15,68%. Penggunaan struktur base isolation mampu mereduksi tulangan longitudinal pada balok sebesar 21,18 – 71,12 kg/m3 beton dan kolom sebesar 138,6 – 415,80 kg/m3 beton, drift rasio pada arah X sebesar 70,42% dan arah Y sebesar 89,82%, dan meningkatkan kinerja dari intermediate occupancy (IO) menjadi level fully operational. Hasil perencanaan elemen struktur didapatkan tebal pelat 12 cm, dimensi balok anak BA1 30x45 cm dan BA2 25x40cm, dimensi balok induk B1 60x90cm, B4 50x80 cm, dan B5 45x70cm, dimensi kolom K1 100x100cm, K2 80x80 cm, K3 70x70 cm, dan K4 60x60 cm. Friction pendulum yang digunakan pada gedung ini terdapat tiga tipe yaitu SIP-D-HF-326, SIP D-HF-327, dan SIP-D-HF-328 yang merupakan produk dari Maurer.
Kata Kunci : base isolation, nonlinear time history, kinerja seismik
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Along with the increase in seismic activity, one of which is marked by an increase in active faults by 450% from 2010 to 2017. The need for earthquake-resistant buildings is something that must be met, especially for areas with high earthquake vulnerability such as Surabaya which is flanked by two active faults. The limited ability of self-evacuation of occupants of the review building is a consideration for conducting further analysis to protect humans from natural disasters. In this final assignment, we will discuss how the comparison of commonly used structures (fixbase) with the Friction Pendulum System (FPS) type isolation structure (base isolation) will be discussed, to determine how far base isolation works on building behavior. This study aims to determine the comparison of primary structural reinforcement, basic shear force, displacement, inter-story drift, performance level, and collapse pattern of the fixbase building structure with the base isolation structure. A case study was taken of Building C of the Vertical UPT Hospital located in a high earthquake area, namely Surabaya. To determine the performance of the structure if it is hit by an earthquake, a Nonlinear Time History (NLTHA) analysis was carried out.
Based on the analysis results, it was found that the structure with base isolation has a period 2.5 times greater than the fixed base structure. The base isolation structure with a response modification coefficient value (R = 2) has a smaller base shear force compared to the fixed base structure using a response modification coefficient value (R = 8) with a difference of 15.68%. The use of the base isolation structure can reduce the longitudinal reinforcement in the beam by 21.18 - 71.12 kg / m3 of concrete and columns by 138.6 - 415.80 kg / m3 of concrete, the drift ratio in the X direction by 70.42% and the Y direction by 89.82% and increase the performance of intermediate occupancy (IO) to the fully operational level. The results of the structural element planning obtained a plate thickness of 12 cm, dimensions of child beams BA1 30x45 cm and BA2 25x40cm, dimensions of main beams B1 60x90cm, B4 50x80 cm, and B5 45x70cm, dimensions of columns K1 100x100cm, K2 80x80 cm, K3 70x70 cm, and K4 60x60 cm. There are three types of friction pendulums used in this building, namely SIP-D-HF-326, SIP D-HF-327, and SIP-D-HF-328 which are products of Maurer.
Keyword: base isolation, nonlinear time history, seismic performance
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | base isolation, nonlinear time history, kinerja seismik |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA174 Computer-aided design. 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 Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Rifki Fadli |
| Date Deposited: | 07 Aug 2024 06:10 |
| Last Modified: | 07 Aug 2024 06:10 |
| URI: | http://repository.its.ac.id/id/eprint/110704 |
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