Modifikasi Perencanaan Struktur Gedung Palang Merah Indonesia Kabupaten Sukabumi Menggunakan Sistem Base Isolation Tipe High Damping Rubber Bearing

Sitorus, Sinar Nathalia (2023) Modifikasi Perencanaan Struktur Gedung Palang Merah Indonesia Kabupaten Sukabumi Menggunakan Sistem Base Isolation Tipe High Damping Rubber Bearing. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Berdasarkan data rekaman kegempaan di BMKG, gempa bumi di Indonesia rata-rata terjadi 5.000 kali dalam setahun. Pada tahun 2017 kejadian gempa bumi meningkat menjadi 7.000 kali, bahkan di tahun 2018 menjadi 11.920 kali. Menurut Badan Geologi Kementerian Energi dan Sumber Daya Mineral, salah satu daerah di Indonesia yang rawan terjadi gempa bumi adalah Sukabumi, sehingga dalam merancang bangunan di wilayah yang rawan gempa perlu perhatian khusus.
Pada metode konvensional, desain bangunan tahan gempa didasarkan pada konsep pencegahan dimana ketika bangunan menghadapi gempa besar, bangunan diizinkan mengalami kerusakan, namun orang-orang di dalam bangunan harus tetap tidak terluka. Seiring berkembangnya zaman, berbagai inovasi dilakukan untuk dapat mengatasi masalah kerusakan bangunan akibat gempa bumi dengan lebih efektif. Menurut Wijaya et al. (2019), salah satu solusi untuk mengurangi dampak kerugian akibat terjadinya gempa adalah dengan sistem base isolation. Karet dari base isolatior merupakan alat yang paling efektif untuk meredam gaya gempa yang disalurkan ke gedung dimana pada prinsipnya, penggunaan base isolation dapat memperpanjang periode getar struktur jauh melampaui periode energi gempa ketika mengalami deformasi. Pada modifikasi ini, jenis base isolator yang digunakan adalah High Damping Rubber Bearing (HDRB) yang merupakan salah satu jenis laminated rubber bearing yang terbuat dari penggabungan senyawa karet dengan nilai rasio redaman yang tinggi.
Pada tugas akhir ini dilakukan modifikasi pada struktur Gedung Palang Merah Indonesia (PMI) Kabupaten Sukabumi. Gedung PMI Kabupaten Sukabumi yang sebelumnya dirancang dengan metode konvensional dirancang kembali menggunakan metode base isolation. Dari hasil modifikasi didapatkan penggunaan sistem isolasi pada gedung mampu mereduksi gaya geser dasar pada bangunan secara signifikan, dimana dalam studi ini rata-rata reduksi gaya gesernya sebesar 4 kali lipat. Selain itu, gedung dengan sistem isolasi sudah mencapai >90% partisipasi massa dari mode 1 dan mode 2. Shifting Period pada sistem isolasi mencapai 2,7 kali untuk arah X dan 2,8 kali untuk arah Y dan simpangan antar lantai pada struktur sistem isolasi berkurang hingga >60% dari pada struktur dengan sistem fixed base.

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Based on recorded seismic data at the BMKG, earthquakes in Indonesia occur on average 5000 times a year. In 2017, the incidence of earthquakes increased to 7000 times, even in 2018 to 11920 times. According to the Geological Agency of the Ministry of Energy and Mineral Resources, one of the areas in Indonesia that is prone to earthquakes is Sukabumi, therefore designing buildings in earthquake-prone areas requires special attention.
In the conventional method, earthquake-resistant building design is based on the concept of prevention where when a building encounters a large earthquake, the building is allowed to suffer damage, but the people inside the building must remain unharmed. Along with the development of the times, various innovations were made to be able to deal with the problem of damage more effectively to buildings due to earthquakes. According to Wijaya et al. (2019), one solution to reduce the impact of losses due to an earthquake is a base isolation system. Rubber from the base isolator is the most effective tool to reduce the seismic force that is transmitted to the building where in principle, the use of base isolation can extend the vibration period of the structure far beyond the period of earthquake energy when it is deformed. In this modification, the type of base isolator used is High Damping Rubber Bearing (HDRB) which is a type of laminated rubber bearing made from combining rubber compounds with a high damping ratio value.
In this final project, modifications will be made to the structure of the Indonesian Red Cross (PMI) Sukabumi Regency Building. This building which was previously designed using the conventional method will be redesigned using the base isolation method. According to the results of the modification, the use of an isolation system in buildings was able to significantly reduce the base shear forces on buildings, with an average reduction in shear forces of four times in this study. Buildings designed with an isolation system achieved > 90% mass participation from modes 1 and 2. The shifting period on the base isolation system reaches 2.7 times for the X direction and 2.8 times for the Y direction, and the drift between floors in the system structure insulation is reduced to more than 60% when compared to a fixed base system structure.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Struktur Bangunan Tahan Gempa, Isolasi Dasar, HDRB, Earthquake Resistant Building Structures, Base Isolation, HDRB.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design 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:	Sinar Nathalia Sitorus
Date Deposited:	08 Feb 2023 08:33
Last Modified:	08 Feb 2023 08:33
URI:	http://repository.its.ac.id/id/eprint/96547

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