ANALISIS RESPON DINAMIK STRUKTUR DENGAN MODIFIKASI BASE ISOLATION : LEAD RUBBER BEARING STUDI KASUS HOTEL DI BANDUNG JAWA BARAT

BRIANDANU, GRANICO (2021) ANALISIS RESPON DINAMIK STRUKTUR DENGAN MODIFIKASI BASE ISOLATION : LEAD RUBBER BEARING STUDI KASUS HOTEL DI BANDUNG JAWA BARAT. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

Base isolation is one of the most widely used seismic protection systems used in building structures in earthquake prone areas. The purpose of this paper is to see a comparison of the percentage of structural performance between buildings that use a base isolation system or without a base isolation system (fixed base). In this study a fourteen- story reinforced concrete structure building with a base isolation system was used in the form of Lead Rubber Bearings (LRB). The research method uses a dyniamic responses analysis which will be scaled by the response spectrum of the Jakarta earthquake acceleration with soft soil conditions (SE). Theparameters compared are the time period of the building structure, the lateral displacement of the building, and the story drift. The results obtained were an increase in the time period of the building structure by 192.3%, the base shear force due to the energy dissipation of the base isolation is 31.5% in the x direction and 29.3% in the y direction. Based on the results of the comparison of the parameters obtained, the use of the base isolation system can work better inreducing seismic forces than without a base isolation system. Key Word : Base Isolation, Lead Rubber Bering (LRB), Reinforced Concrete Structure Base isolation system merupakan salah satu sistem perlindungan seismik yang paling banyak digunakan dalam pembangunan struktur di daerah rawan gempa. Tujuan penulisan ini untuk melihat perbandingan persentase kinerja struktur antara bangunan yang menggunakan base isolation system maupun tanpa base isolation system (tumpuan jepit). Dalam penelitian ini dimodelkan bangunan struktur beton bertulang empat belas lantai dengan base isolation system yang digunakan berupa Lead Rubber Bearing (LRB). Metode penelitian menggunakan analisis respon dinamik struktur yang akan diskalakan dengan respon spektrum percepatan gempa Bandung dengan kondisi tanah lunak (SE). Parameter yang dibandingkan adalah perioda getar struktur bangunan, perpindahan lateral bangunan, dan simpangan antar lantai. Hasil yang diperoleh yaitu terjadi peningkatan perioda getar struktur sebesar 192,3%, gaya geser dasar akibat dispasi energi yang dimiliki base isolation sebesar 31,5% pada arah x dan 29,3% pada arah y. Berdasarkan hasil perbandingan parameter yang diperoleh tersebut, dapat disimpulkan bahwa penggunaan base isolation system dapat bekerja lebih baik dalam mereduksi gaya gempa dibandingkan tanpa LRB. Kata kunci : Base Isolation, Lead Rubber Bearing (LRB), Struktur Beton Bertuang

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