Alternatif Desain Struktur Gedung Mercantile Tower Menggunakan Sistem Base Isolation Tipe High Damping Rubber Bearing (HDRB)

Mubaraq, Syafrullah (2021) Alternatif Desain Struktur Gedung Mercantile Tower Menggunakan Sistem Base Isolation Tipe High Damping Rubber Bearing (HDRB). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Indonesia merupakan negara yang dilewati cincin api, hal itu membuat wilayah Indonesia rawan terjadi gempa. Gempa dapat menimbulkan kerugian yang sangat besar. Pada perencanaan konvesional (fixed-base) sering kali tidak maksimal dalam mengatasi kerusakan elemen struktur maupun non-struktur. Hal itu disebabkan karena adanya perbedaan simpangan antar lantai (interstory drift) yang terlalu besar. Untuk memperkecil besarnya simpangan antar lantai bisa dengan cara menambahkan bahan penahan gempa (seismic device). Salah satu jenis sistem proteksi gempa yaitu seismic isolated structure (base isolation).
Pada Proyek akhir ini akan dilakukan analisis 1 struktur gedung Mercantile Tower dual system (shearwall dan SRPMK) selanjutnya akan dilakukan kontrol sesuai persyaratan SNI 1726:2019. Pada analisis 2 dilakuakan analisis struktur eksisting tanpa shearwall (SRPMK) kemudian dilakukan kontrol sesuai SNI 1726:2019. Pada kedua analisis yang dilakukan dapat diambil kesimpulan apakah shearwall bekerja atau tidak. Selanjutnya akan dilakukan alternatif desain menggunakan sistem base isolation (SRPMB+HDRB). Selanjutnya akan dibahas bagaimana perbandingan struktur eksisting dual system (Fixed-base) dengan struktur base isolation tipe high damping rubber bearing (HRDB). Hasil analisis tersebut digunakan untuk mengetahui seberapa jauh pengaruh sistem base isolation terhadap kinerja struktur gedung.
Pada hasil perhitungan dan analisis struktur, gedung yang ditinjau menggunakan HDRB mengalami reduksi maksimum gaya geser tiap lantai pada struktur sebesar 69% dan reduksi rata – rata sebesar 20% arah x, sedangkan arah y reduksi maksimum sebesar 65% dan reduksi rata – rata sebesar 18%. Gaya geser dasar (base shear) pada struktur base isolation mengalami reduksi sebesar 24% arah x dan 20% arah y. Struktur gedung yang menggunakan HDRB memiliki displacement lebih besar dari struktur eksisting dual system, displacement meningkat 82,8% untuk arah x dan 71,4% untuk arah y. Struktur gedung yang ditinjau menggunakan HDRB mampu mereduksi maksimum simpangan antar lantai terhadap struktur fixed-base eksisting sebesar 84% dan reduksi rata – rata sebesar 48% untuk arah x. Untuk arah y dapat mereduksi simpangan maksimum sebesar 84% dan reduksi rata – rata sebesar 57%.
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Indonesia is a country that passed through the ring of fire, it makes the Indonesian region prone to earthquakes. Earthquakes can cause enormous losses. In fixed-base planning is often not maximal in overcoming the damage to structural and non-structural elements. This is due to the difference in a deviation between floors (interstory drift) that is too large. To reduce the magnitude of deviation between floors can be by adding earthquake containment material (seismic device). One type of earthquake protection system is a seismic isolated structure (base isolation).
In this final project, analysis 1 of the building structure of the Mercantile Tower dual system (shearwall and SRPMK) will be carried out by the requirements of SNI 1726:2019. In analysis 2 analyzed existing structures without shearwall (SRPMK) then carried out control by SNI 1726:2019. In both analyses, it can be concluded whether the shearwall works or not. Furthermore, an alternative design will be done using a base isolation system (SRPMB+HDRB). Next will be discussed how the comparison of the dual system existing structure (Fixed-base) with base isolation structure type high damping rubber bearing (HRDB). The results of the analysis are used to find out how far the base isolation system affects the performance of building structures.
In the results of the calculation and analysis of the structure, buildings reviewed using HDRB experienced a maximum reduction of the floor shear force of the structure by 69% and an average reduction of 20% in x directions. For the y-direction, the maximum reduction is 65% and the average reduction is 18%. Base shear in base isolation structures is reduced by 24% x-way and 20% y-way. Building structures using HDRB have displacement larger than existing dual system structures, displacement increased by 82.8% for direction x and 71.4% for direction y. The building structure reviewed using HDRB was able to reduce the maximum deviation between floors against the existing fixed-base structure by 84% and the average reduction by 48% for the x-direction. The y-direction can reduce the maximum deviation by 84% and the average reduction by 57%.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Fixed-base, Base Isolation, High Damping Rubber Bearing, Interstory Drift, Base Shear
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TH Building construction > TH1095 Earthquakes and building T Technology > TH Building construction > TH880 Sustainable buildings. Sustainable construction. Green building
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Syafrullah Mubaraq
Date Deposited:	01 Sep 2021 06:39
Last Modified:	01 Sep 2021 06:39
URI:	http://repository.its.ac.id/id/eprint/90507

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