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Studi Komparatif Perilaku Nonlinear Slender Shearwall Dan Squat Shearwall Terhadap Beban Dinamik Wijaya, Ryan; Arfiadi , Yoyong
Jurnal Impresi Indonesia Vol. 4 No. 8 (2025): Indonesian Impression Journal (JII)
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jii.v4i8.6905

Abstract

his study aims to conduct a comparative investigation of two types of reinforced concrete shear walls namely, slender shearwalls and squat shearwalls in order to understand the differences in their dynamic responses and hysteretic behavior under seismic loading. The analysis was performed through a numerical approach using time history simulation in the OpenSees software, with the El Centro earthquake record as input. The study focuses on evaluating structural displacement, force, rotation, moment, and ductility based on force-displacement and moment-rotation relationships. The results indicate that the slender shearwall exhibits larger displacement responses, more significant plastic rotations, and better ductility performance in the positive direction. Conversely, the squat shearwall demonstrates greater lateral stiffness and strength, along with higher ductility in the negative direction. The hysteretic characteristics of both wall types further reflect the dominance of different structural mechanisms slender shearwalls tend to exhibit flexural behavior, while squat shearwalls are primarily governed by shear action. Overall, the simulation results reveal that each shearwall type has its own distinctive advantages. The slender shearwall is more effective in accommodating plastic deformation, whereas the squat shearwall excels in resisting large lateral forces with limited deformation. These findings are expected to serve as a reference for the design of shear wall systems in earthquake-resistant buildings, particularly in Indonesia.
Studi Parametrik Perilaku Nonlinear Tuned Mass Damper Dengan Model Bouc-Wen Menggunakan OpenSees Jati, Mathias Siloam Kuncoro; Arfiadi , Yoyong
Jurnal Locus Penelitian dan Pengabdian Vol. 4 No. 8 (2025): JURNAL LOCUS: Penelitian dan Pengabdian
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/locus.v4i8.4735

Abstract

Studi parametrik ini bertujuan menganalisis pengaruh variasi rasio frekuensi terhadap kinerja Nonlinear Tuned Mass Damper (NTMD) model Bouc-Wen tanpa pinching dalam mereduksi respons seismik struktur menggunakan perangkat lunak OpenSees. Penelitian dilakukan dengan time history analysis menggunakan eksitasi gempa Kobe (Stasiun Abeno) terhadap lima variasi rasio frekuensi (0,8; 0,95; 1,0; 1,05; dan 2,0). Aspek yang dianalisis meliputi, perpindahan puncak struktur, gaya geser dasar maksimum, karakteristik loop histeresis, dan kapasitas disipasi energi sistem NTMD. Hasil penelitian menunjukkan bahwa variasi rasio frekuensi berpengaruh secara signifikan terhadap amplitudo dan fase waktu perpindahan puncak struktur. Konfigurasi dengan rasio frekuensi mendekati frekuensi natural struktur (? = 0,95 dan ? = 1,00) memberikan kinerja optimal dengan reduksi perpindahan puncak masing-masing sebesar 44,52% dan 33,99%, serta reduksi gaya geser dasar sebesar 44,57% dan 33,82%. Pola reduksi gaya geser dasar menunjukkan kecenderungan yang sejalan dengan reduksi perpindahan maksimum. Semua konfigurasi menghasilkan loop histeresis berbentuk elips tanpa efek pinching dengan total energi disipasi berkisar antara 21,13-32,15 Joule. Penelitian ini mengkonfirmasi bahwa optimasi rasio frekuensi NTMD sangat menentukan efektivitas sistem dalam mengurangi respons dinamik struktur akibat beban seismik. Penyetelan yang tepat pada nilai mendekati frekuensi natural struktur menghasilkan performa peredaman optimal, sedangkan penyetelan yang terlalu rendah atau berlebihan menurunkan efektivitas sistem kontrol struktur.