Perbandingan Perilaku Siklik Elemen Replaceable Link Material Baja Konvesional Dengan Low Yield Point Steel (LYS)

Aulia Indira Kumalasari(1*), Budi Suswanto(2), Hidajat Sugihardjo(3)

(1) Teknik Sipil,Fakultas Teknik, Universitas Muhammadiyah Malang, Malang, Jawa Timur
(2) Teknik Sipil, Fakultas Teknik, Institut Teknologi Sepuluh Nopember, Surabaya, Jawa Timur
(3) Teknik Sipil, Fakultas Teknik, Institut Teknologi Sepuluh Nopember, Surabaya, Jawa Timur
(*) Corresponding Author

DOI: https://doi.org/10.25077/jrs.18.1.17-29.2022

Copyright (c) 2022 Aulia Indira Kumalasari, Budi Suswanto, Hidajat Sugihardjo

Abstract


Selama ini di dalam desain struktur Eccentrically Braced Frames (EBF), link selalu didesain secara menyatu dengan balok lantai sehingga menyebabkan terjadinya overstrength pada bagian tersebut. Selain itu, desain tersebut juga menjadikan perbaikan pasca gempa menjadi kurang efisien baik dalam segi waktu serta biaya. Selama satu dekade ini, mulai banyak penelitian yang memodelkan replaceable link dengan berbagai pengembangan untuk mendapatkan elemen yang daktail ketika menghadapi gempa, begitu juga dengan penelitian ini. Penelitian ini bertujuan untuk mengetahui perilaku link dengan berbagai macam material terhadap daktilitas, energi disipasi, deformasi dan rotasi, serta pola kegagalan pasca terjadi gempa. Pada penelitian ini dilakukan pengujian terhadap empat spesimen web bolted replaceable link dengan variasi material baja konvensional dan juga baja low yield pont (LYS). Analisa dilakukan dengan metode numerik yaitu dengan mengaplikasikan beban siklik bolak balik pada elemen link. Beban tersebut kemudian dikontrol trerhadap perpindahan di salah satu ujung link. Kemudian hasil pengujian dianalisa berdasarkan daktilitas, energi disipasi, deformasi, serta pola kegagalan. Hasil pemodelan menunjukkan link dengan tipe sambungan web bolted menghasilkan kurva dengan pinching effect yang disebabkan oleh sambungan baut. Selain itu, link LYS100 menunjukkan nilai rotasi yang besar dikarenakan material tersebut memiliki regangan ultimate yang lebih besar dibanding dengan baja konvensional. Dari pemodelan numerik didapatkan bahwa replaceable link dengan material LYS hasilnya sebanding dengan link dengan baja konvensional serta link tersebut mampu memenuhi persyaratan terkait daktilitas, kemampuan mendisipasi energi, serta besar rotasi yang dihasilkan.

Keywords


eccentrically braced frames; replaceable link; low yield steel; abaqus; daktilitas

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Jurnal Rekayasa Sipil (JRS)-Universitas Andalas (Unand). ISSN: 1858-2133 (print) & 2477-3484 (online)

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