Studi Komparasi Struktur Gedung 9 Lantai Menggunakan Flat Slab dengan Base Isolation Tipe Lead Rubber Bearing dan dengan Dinding Geser Beton Bertulang Khusus

Utomo, Raditya Hena Putra (2026) Studi Komparasi Struktur Gedung 9 Lantai Menggunakan Flat Slab dengan Base Isolation Tipe Lead Rubber Bearing dan dengan Dinding Geser Beton Bertulang Khusus. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Indonesia terletak pada jalur Cincin Api Pasifik dan merupakan titik pertemuan beberapa lempeng tektonik utama dunia, sehingga memiliki aktivitas seismik tinggi dan rentan terhadap gempa bumi. Berdasarkan SNI 1726:2019, fasilitas pendidikan termasuk dalam Kategori Risiko IV yang menuntut tingkat kinerja struktur tinggi terhadap beban gempa, sehingga Gedung Psikologi Universitas Islam Negeri Sunan Ampel (UINSA) perlu dirancang dengan standar ketahanan gempa yang lebih ketat, yang berdampak pada meningkatnya kebutuhan material dan biaya konstruksi. Tugas akhir ini membahas modifikasi dan studi komparasi struktur Gedung Psikologi UINSA menggunakan sistem flat slab dengan base isolation tipe Lead Rubber Bearing (LRB) tipe LL090G4-I dan LL080G4-H dan dengan dinding geser beton bertulang khusus. Analisis dilakukan pada struktur primer dan sekunder untuk kedua sistem, mengacu pada SNI 2847:2019, SNI 1726:2019, SNI 1727:2020, serta literatur pendukung lainnya. Pemodelan struktur dilakukan menggunakan ETABS, dengan verifikasi respons isolator melalui Linear Time History Analysis. Parameter pembanding meliputi gaya geser dasar, periode struktur, partisipasi massa modal, perpindahan, percepatan lantai, interstory drift, dan biaya material.
Hasil analisis menunjukkan bahwa sistem base isolation memiliki periode alami mode pertama 330,06% lebih besar dan partisipasi massa modal mode pertama sebesar 92,82%, dibandingkan struktur dinding beton bertulang khusus yang hanya 63,87%. Gaya geser dasar sistem base isolation lebih kecil hingga 83,33% (arah-X) dan 80,90% (arah-Y), dengan percepatan lantai atap lebih rendah hingga 72,74% (arah-X) dan 75,83% (arah-Y). Namun, story drift struktur dengan base isolation memiliki nilai rata-rata lebih tinggi dibandingkan struktur dengan dinding geser beton bertulang khusus yaitu sebesar 102,4% (arah-X) dan 112,7% (arah-Y). Pada aspek biaya, struktur flat slab dengan base isolation meningkat 12,81%, sedangkan struktur flat slab dengan dinding geser beton bertulang khusus mengalami kenaikan biaya 8,97%% terhadap struktur eksisting
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Indonesia is located along the Pacific Ring of Fire and at the convergence of several major tectonic plates, making it highly susceptible to seismic activity and earthquakes. According to SNI 1726:2019, educational facilities are classified as Risk Category IV, requiring a high level of structural performance under seismic loading. Consequently, the Psychology Building of Sunan Ampel State Islamic University (UINSA) must be designed to meet more stringent seismic resistance requirements, which inevitably increases material demand and construction costs. This study presents the structural modification and comparative analysis of the UINSA Psychology Building using a flat slab system with Lead Rubber Bearing (LRB) base isolation (types LL090G4-I and LL080G4-H) and a flat slab system with reinforced concrete special shear walls. The analyses were conducted for both the primary and secondary structural systems in accordance with SNI 2847:2019, SNI 1726:2019, SNI 1727:2020, and other relevant references. Structural modeling was performed using ETABS, while the isolator response was verified through Linear Time History Analysis. The comparison parameters included base shear, structural period, modal mass participation, displacement, floor acceleration, interstory drift, and material cost.
The analysis results indicate that the base-isolated structure exhibits a first-mode natural period that is 330.06% longer and a first-mode modal mass participation ratio of 92.82%, compared with only 63.87% for the structure with reinforced concrete special shear walls. Furthermore, the base-isolated system reduces base shear by up to 83.33% in the X-direction and 80.90% in the Y-direction, while the roof floor acceleration decreases by 72.74% and 75.83% in the X- and Y-directions, respectively. However, the average interstory drift of the base-isolated structure is higher than that of the structure with reinforced concrete special shear walls by 102.4% in the X-direction and 112.7% in the Y-direction. In terms of material cost, the flat slab structure with base isolation increases by 12,81%, whereas the flat slab structure with reinforced concrete special shear walls increases by 8,97% relative to the existing structural system.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Isolasi dasar, Sistem Ganda, Lead Rubber Bearing, Flat Slab, Linear Time History, Base Isolation, dual system, Lead Rubber Bearing, Flat Slab, Linear Time History
Subjects:	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:	Raditya Hena Putra Utomo
Date Deposited:	27 Jul 2026 05:36
Last Modified:	27 Jul 2026 05:37
URI:	http://repository.its.ac.id/id/eprint/137851

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