Comparative Study Of Seismic Response Of Structures Using Fixed Base And High Damping Rubber Bearing Base Isolation In A 6-Story Building In Malang

Silaban, Tongam T M (2025) Comparative Study Of Seismic Response Of Structures Using Fixed Base And High Damping Rubber Bearing Base Isolation In A 6-Story Building In Malang. Other thesis, Institut Teknologi Sepuluh November.

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Abstract

Bantalan Karet Peredam Tinggi (HDRB) adalah sistem isolasi dasar inovatif yang dirancang untuk mendisipasi energi seismik dan mengurangi getaran yang ditransmisikan ke struktur bangunan. Studi ini membandingkan kinerja seismik sebuah bangunan enam lantai di Malang menggunakan dua sistem struktur: struktur dasar tetap konvensional dan struktur isolasi dasar yang dilengkapi dengan HDRB. Analisis dilakukan menggunakan metode Linear Time History dalam perangkat lunak ETABS dengan rekaman gempa bumi nyata untuk mensimulasikan kondisi seismik aktual. Hasil penelitian menunjukkan bahwa penerapan HDRB secara signifikan meningkatkan kinerja struktur dengan meningkatkan periode fundamental hingga 197%, mengurangi geser dasar sebesar 35,69% pada arah X dan 36,01% pada arah Y, serta mengurangi simpangan antar lantai masing-masing sebesar 31,46% dan 33,04%. Pengurangan geser dasar juga menghasilkan gaya internal yang lebih kecil, sehingga memungkinkan dimensi komponen struktur yang lebih kecil. Akibatnya, desain isolasi dasar mencapai efisiensi material yang lebih tinggi, dengan pengurangan volume beton sebesar 11,81% dan tulangan sebesar 18,43% dibandingkan dengan struktur dasar tetap. Temuan ini menunjukkan bahwa isolasi dasar HDRB tidak hanya meningkatkan ketahanan seismik tetapi juga berkontribusi pada efisiensi material dan biaya. Studi ini mendukung adopsi teknologi isolasi dasar yang lebih luas dan memberikan wawasan berharga bagi pengembangan standar desain tahan gempa di Indonesia di masa mendatang
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High Damping Rubber Bearing (HDRB) is an innovative base isolation system designed to dissipate seismic energy and reduce vibrations transmitted to building structures. This study compares the seismic performance of a six-story building in Malang using two structural systems: a conventional fixed-base structure and a base-isolated structure equipped with HDRB. The analysis was conducted using the Linear Time History method in ETABS software with real earthquake records to simulate actual seismic conditions. The results show that the implementation of HDRB significantly enhances structural performance by increasing the fundamental period up to 197%, reducing base shear by 35.69% in the X-direction and 36.01% in the Y-direction, and decreasing interstory drift by 31.46% and 33.04%, respectively. The reduction in base shear also leads to smaller internal forces, allowing for smaller structural member dimensions. Consequently, the base-isolated design achieved higher material efficiency, with reductions of 11.81% in concrete volume and 18.43% in rebar reinforcement compared to the fixed-base structure. These findings demonstrate that HDRB base isolation not only improves seismic resilience but also contributes to material and cost efficiency. The study supports the wider adoption of base isolation technology and provides valuable insight for future development of earthquake-resistant design standards in Indonesia

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Seismic Response, Base Isolation, High Damping Rubber Bearing, Base Shear, Structural Efficiency
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA355 Vibration. 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:	TONGAM T M SILABAN
Date Deposited:	04 Dec 2025 01:01
Last Modified:	04 Dec 2025 01:01
URI:	http://repository.its.ac.id/id/eprint/128862

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