Analisis Perilaku Sambungan Replaceable Dengan Mekanisme Kuncian Dan Sambungan Konvensional Pada Sistem Rangka Baja Pemikul Momen Khusus

Baskara, Luqman (2026) Analisis Perilaku Sambungan Replaceable Dengan Mekanisme Kuncian Dan Sambungan Konvensional Pada Sistem Rangka Baja Pemikul Momen Khusus. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kerusakan struktur baja akibat beban gempa dapat menyebabkan penurunan kinerja struktur serta meningkatkan kebutuhan perbaikan pascagempa. Salah satu konsep yang dikembangkan adalah sambungan replaceable dengan mekanisme structural fuse, yaitu memusatkan kerusakan pada elemen yang dapat diganti sehingga elemen utama struktur tetap terlindungi. Penelitian ini bertujuan menganalisis perbedaan perilaku sambungan replaceable dengan mekanisme kuncian dan sambungan konvensional pada Sistem Rangka Baja Pemikul Momen Khusus (SRPMK) berdasarkan kapasitas kekuatan, kekakuan, respons histeresis, disipasi energi, serta distribusi plastisitas. Analisis dilakukan menggunakan metode elemen hingga dengan perangkat lunak Abaqus/Standard melalui pembebanan monotonik dan siklik. Parameter evaluasi meliputi kurva beban–perpindahan, kekakuan sambungan, disipasi energi, tegangan von Mises, regangan plastis ekuivalen (Equivalent Plastic Strain/PEEQ), dan lokasi terbentuknya zona plastis. Hasil analisis menunjukkan bahwa sambungan replaceable memiliki kapasitas beban maksimum sebesar 1015,7 kN, sedangkan sambungan konvensional sebesar 526,4 kN, atau meningkat sebesar 92,94%. Kekakuan sekan sambungan replaceable sebesar 44,0 kN/mm, lebih tinggi dibandingkan sambungan konvensional sebesar 17,2 kN/mm. Pada pembebanan siklik, disipasi energi total sambungan konvensional sebesar 276.156,94 kN.mm, sedangkan sambungan replaceable sebesar 178.612,43 kN.mm. Distribusi plastisitas menunjukkan sambungan konvensional mengalami konsentrasi deformasi plastis pada ujung balok dengan nilai PEEQ maksimum 0,464, sedangkan sambungan replaceable memusatkan plastisitas pada elemen sekering dengan nilai PEEQ maksimum 1,156 atau 2,49 kali lebih besar. Evaluasi terhadap AISC 341-22, AISC 358-22, dan SNI 1726:2019 menunjukkan kedua sambungan mampu mencapai deformasi inelastik mendekati rotasi 0,04 rad, dengan sambungan replaceable memberikan mekanisme kerusakan yang lebih terkendali melalui konsep controlled damage mechanism.
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Steel structures subjected to seismic loading may experience significant damage, resulting in reduced structural performance and increased post-earthquake repair requirements. One of the developed approaches is the use of replaceable connections incorporating a structural fuse concept, in which damage is concentrated on replaceable components while protecting the main structural members. This study aims to investigate the behavioral differences between replaceable connections with interlocking mechanisms and conventional connections in Special Moment Resisting Frames (SMRF) based on strength capacity, stiffness, hysteretic response, energy dissipation, and plasticity distribution. The analysis was conducted using the finite element method with Abaqus/Standard through monotonic and cyclic loading simulations. The evaluated parameters include load– displacement response, connection stiffness, energy dissipation, von Mises stress distribution, equivalent plastic strain (PEEQ), and plastic zone development. The results show that the replaceable connection achieved a maximum load capacity of 1015.7 kN, while the conventional connection reached 526.4 kN, representing an increase of 92.94%. The secant stiffness of the replaceable connection was 44.0 kN/mm, which was higher than the conventional connection of 17.2 kN/mm. Under cyclic loading, the total energy dissipation of the conventional connection was 276,156.94 kN.mm, whereas the replaceable connection dissipated 178,612.43 kN.mm, indicating different energy dissipation mechanisms between the two connection systems. The plasticity distribution analysis showed that the conventional connection experienced plastic deformation concentrated at the beam end with a maximum PEEQ value of 0.464, while the replaceable connection concentrated plastic deformation within the replaceable fuse element with a maximum PEEQ value of 1.156, approximately 2.49 times higher. This demonstrates that the interlocking mechanism successfully redirects damage toward the replaceable component, providing better protection for the primary beam and column elements. Evaluation based on AISC 341-22, AISC 358-22, and SNI 1726:2019 indicates that both connections achieved inelastic deformation close to the target rotation of 0.04 rad. The replaceable connection provides advantages in strength, stiffness, and damage control through the controlled damage mechanism concept.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Replaceable Link, Mekanisme Kuncian, Sambungan Konvensional, SRPMK, Perilaku Sambungan, Disipasi Energi.Replaceable Link, Locking Mechanism, Conventional Connection, Connection Behavior, Energy Dissipation.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering) T Technology > TA Engineering (General). Civil engineering (General) > TA658 Structural design T Technology > TA Engineering (General). Civil engineering (General) > TA660.F7 Structural frames.
Divisions:	Faculty of Vocational > Civil Engineering Maintenance and Restoration of Buildings (S2)
Depositing User:	Luqman Baskara
Date Deposited:	04 Aug 2026 09:51
Last Modified:	04 Aug 2026 09:51
URI:	http://repository.its.ac.id/id/eprint/143435

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