Perancangan Ulang Jembatan Modangan Dengan Menggunakan Sistem Struktur Busur Baja : Implementasi FVD-LRBP dan Orthotropic Deck untuk Meningkatkan Kinerja Dinamik

Bashyroh, Lu'lu' (2026) Perancangan Ulang Jembatan Modangan Dengan Menggunakan Sistem Struktur Busur Baja : Implementasi FVD-LRBP dan Orthotropic Deck untuk Meningkatkan Kinerja Dinamik. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Peningkatan kualitas infrastruktur merupakan prioritas utama pemerintah dalammemperkuat konektivitas antarwilayah. Jembatan Modangan di Jalur Lintas Selatan JawaTimur, yang menghubungkan Kecamatan Donomulyo (Kabupaten Malang) dan KecamatanWates (Kabupaten Blitar), mengalami penurunan kinerja struktural berupa amblasnya ujungjembatan, sehingga diperlukan perancangan ulang dengan sistem struktur yang lebih andalterhadap beban vertikal maupun dinamis akibat gempa. Jembatan direncanakan ulangmenggunakan sistem struktur busur rangka baja BJ 55 bentang 100 m, tinggi busur 20 m, danlebar total 10 m, dengan lantai kendaraan sistem Orthotropic Steel Deck (deck plate 20 mm)serta busur profil box 500×1000×25×25 mm. Sistem proteksi seismik menggunakan kombinasiFluid Viscous Damper (FVD) dan Laminated Rubber Bearing Pad (LRBP). Struktur sekundermemenuhi kontrol tegangan SNI 1725:2016 (tegangan maksimum 119,548 MPa < izin 273,33MPa), sedangkan struktur primer memenuhi kontrol partisipasi massa 90% pada mode ke-3(transversal) dan mode ke-12 (longitudinal). Lendutan akibat beban BTR dan truk (62,31 mmdan 8,41 mm) memenuhi batas izin 125 mm, dan kabel hanger tetap dalam kapasitas ultimitmeski satu kabel putus. Analisis Non Linear Time History menunjukkan base shear tereduksi94,5% (dari 33.970,03 kN menjadi 1.859,28 kN) pada sistem LRBP+FVD, dengan deckdisplacement tereduksi 64,3% dibanding LRBP tunggal (36,80 mm vs 102,96 mm), sertadisipasi energi redaman mencapai 32,2% dari energi input gempa. Struktur juga memenuhikontrol aerodinamis (kecepatan kritis flutter 473,859 km/jam) dan kelayakan pondasi boredpile. Secara keseluruhan, sistem FVD-LRBP bekerja komplementer dan memenuhi seluruhkriteria kekuatan, kestabilan, serta kelayakan konstruksi.
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Improving infrastructure quality is a key priority for the government in strengtheninginter-regional connectivity. The Modangan Bridge on the South Coastal Route of East Java,connecting Donomulyo District (Malang Regency) and Wates District (Blitar Regency), hasexperienced a decline in structural performance, indicated by settlement at the bridge ends,making it inadequate to accommodate increased traffic volume. A redesign is therefore requiredusing a structural system that is more reliable against both vertical and dynamic loads inducedby earthquakes. The bridge is redesigned using a BJ 55 steel arch structure with a 100 m span,20 m arch height, and 10 m total width, with an Orthotropic Steel Deck system (20 mm deckplate) and a box-section arch measuring 500×1000×25×25 mm. The seismic protection systememploys a combination of Fluid Viscous Dampers (FVD) and Laminated Rubber Bearing Pads(LRBP). The secondary structure satisfies the stress control requirements of SNI 1725:2016,with a maximum stress of 119.548 MPa, well below the allowable stress of 273.33 MPa. Theprimary structure meets the 90% mass participation requirement at the 3rd mode (transverse)and 12th mode (longitudinal). Deflections due to BTR and truck loads (62.31 mm and 8.41mm) satisfy the allowable limit of 125 mm, and the hanger cables remain within their ultimatecapacity even under a single-cable-failure condition. Nonlinear Time History Analysis showsthat base shear is reduced by 94.5% (from 33,970.03 kN to 1,859.28 kN) with the LRBP+FVDsystem, while deck displacement is reduced by 64.3% compared to LRBP alone (36.80 mm vs102.96 mm), with damping energy dissipation reaching 32.2% of the input seismic energy. Thestructure also satisfies aerodynamic stability requirements (critical flutter velocity of 473.859km/h) and bored pile foundation adequacy. Overall, the FVD-LRBP system workscomplementarily and fulfills all strength, stability, and constructability criteria.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Fluid Viscous Damper, Jembatan busur rangka baja, Laminated Rubber BearingPad, Orthotropic Steel Deck, Midas Civil v.22 ========================== Fluid Viscous Damper, Laminated Rubber Bearing Pad, Orthotropic Steel Deck,Midas Civil v.22, Steel Arch Truss Bridge
Subjects:	T Technology > TG Bridge engineering
Divisions:	Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4)
Depositing User:	Lu'lu' Bashyroh
Date Deposited:	04 Aug 2026 07:08
Last Modified:	04 Aug 2026 07:08
URI:	http://repository.its.ac.id/id/eprint/143496

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