Evaluasi Dan Rehabilitasi Gedung Eksisting 10 Lantai Menggunakan Friction Damper Berdasarkan SNI 9273:2025

Mahasatria, Gede Krisna (2026) Evaluasi Dan Rehabilitasi Gedung Eksisting 10 Lantai Menggunakan Friction Damper Berdasarkan SNI 9273:2025. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Seiring dengan peningkatan pemahaman mengenai sumber dan bahaya gempa di Indonesia, risiko seismik di berbagai kota semakin meningkat, sehingga bangunan yang didesain menggunakan peta gempa lama berpotensi tidak memenuhi kriteria kinerja saat dievaluasi menggunakan standar terkini. Studi ini melakukan evaluasi dan rehabilitasi seismik gedung eksisting 10 lantai di Surabaya pada tanah lunak dengan penambahan perangkat peredam berupa Friction Damper. Evaluasi dilakukan mengacu pada SNI 9273:2025 melalui tiga tahap, yaitu Tier 1 (screening dan checklist), Tier 2 (analisis linear dinamik metode respons spektrum), dan Tier 3 (analisis nonlinear time history) menggunakan rekaman gempa yang di-matching ke respons spektrum tujuan BSE-2E dengan periode ulang 1000 tahun. Hasil evaluasi struktur eksisting menunjukkan bahwa struktur mengalami kegagalan saat menerima gempa BSE-2E, dengan tingkat kinerja melebihi Collapse Prevention (> CP). Pada Tier 2, sejumlah balok, kolom, dan hubungan balok–kolom tidak memenuhi kriteria Collapse Prevention. Oleh karena itu, dilakukan rehabilitasi menggunakan Friction Damper produk Quaketek Inc. dengan empat tipe slip load (650 kN, 800 kN, 1000 kN, dan 1100 kN), masing-masing 4 unit untuk arah X dan arah Y. Hasil analisis menunjukkan bahwa pemasangan Friction Damper secara signifikan memperbaiki respons seismik struktur, meliputi reduksi periode natural rata-rata 47%, reduksi gaya geser dasar arah X rata-rata 19% dan arah Y rata-rata 20%, serta reduksi simpangan antarlantai arah X rata-rata 60,75% dan arah Y rata-rata 70,90%. Penurunan gaya geser dasar tersebut terjadi akibat dominannya peningkatan redaman efektif melalui mekanisme histeresis Friction Damper, yang ditunjukkan oleh peningkatan rasio disipasi energi rata-rata sebesar 18%. Dengan rehabilitasi ini, tingkat kinerja struktur meningkat dari not considered (> CP) pada kondisi eksisting menjadi (IO – LS) terhadap gempa BSE-2E, sehingga struktur telah memenuhi kriteria kinerja minimum yang disyaratkan.
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The update to the national seismic hazard map adopted in SNI 1726:2019 has led to increased seismic parameters in several regions of Indonesia, including the City of Surabaya, which is predominantly characterized by soft-soil conditions. Existing buildings designed based on SNI 1726:2012 may no longer satisfy the minimum seismic performance requirements; therefore, structural evaluation and rehabilitation are necessary to ensure occupant safety. This study aims to evaluate the seismic performance of an existing 10-story hotel building in Surabaya that uses a Special Moment Resisting Frame (SMRF) system, and to develop a rehabilitation strategy using a friction damper system. The evaluation of the existing structure is conducted in accordance with SNI 9273:2025 using a Performance-Based Seismic Evaluation approach to determine the structural performance level. Nonlinear analysis is performed using Nonlinear Time History Analysis (NLTHA) with selected ground-motion records to assess the structural response in terms of fundamental period, base shear, interstory drift, and seismic performance level. Subsequently, friction dampers are designed as passive energy dissipation devices to enhance seismic energy dissipation without significantly altering the primary structural system. The results indicate that the increased seismic parameters in SNI 1726:2019 reduce the seismic performance of the existing structure and prevent it from meeting the target performance required for public-occupancy buildings. The implementation of friction dampers is shown to improve seismic performance by reducing interstory drift, decreasing internal force demands, and increasing energy dissipation capacity, thereby enabling the structure to satisfy the Life Safety performance criteria in accordance with SNI 9273:2025. Therefore, friction dampers can be an effective and efficient rehabilitation solution for existing buildings in soft-soil regions such as Surabaya.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Evaluasi Bangunan, SNI 1726, SNI 9273, Fricition Damper, NLTHA, Building Evaluation, SNI 1726, SNI 9273, Friction Damper, NLTHA
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Gede Krisna Mahasatria
Date Deposited:	29 Jul 2026 04:40
Last Modified:	29 Jul 2026 04:40
URI:	http://repository.its.ac.id/id/eprint/138435

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