Studi Numerik Usulan Jarak Pengaku Badan Diagonal Link Geser pada Struktur Baja Eccentrically Braced Frame Type–D (original) (raw)

Abstract

Struktur portal baja Eccentrically Braced Frame typeD (EBF-D) dengan link geser berpengaku badan dimodelkan dalam penelitian ini menggunakan perangkat lunak MSC Nastran. Pembebanan diberikan secara monotonik dan siklik dengan kontrol perpindahan. Model struktur link geser berpengaku badan vertikal didesain dengan jarak pengaku sesuai dengan ketentuan AISC 2005. Model yang lain didesain menggunakan link geser berpengaku badan diagonal dengan jarak pengaku antara 30t w-d/5 sampai dengan panjang link (e) atau didesain tidak memenuhi syarat AISC 2005. Parameter konfigurasi pengaku badan diagonal, jarak pengaku (a), panjang link (e), tebal badan link (t w), tebal sayap link (t f) dan tebal pengaku vertikal (t sv) maupun diagonal (t sd) diteliti dalam penelitian ini. Hasil penelitian menunjukkan kinerja struktur portal EBF-D link geser berpengaku badan diagonal lebih baik dibandingkan dengan berpengaku vertikal dari segi kekuatan, kekakuan, daktilitas maupun penyerapan energi dissipasi akibat beban gempa. Jarak optimal antara pengaku badan vertikal yang menggunakan pengaku diagonal diusulkan sebesar 1,6 (30tw-d/5) dengan ketebalan minimum pengaku badan diagonal 5,5 mm atau sama dengan tebal badan dan 8 mm untuk tebal minimum pengaku vertikal. Kata-kata Kunci: Eccentrically Braced Frame typeD (EBF-D), link geser, beban monotonik, beban siklik, pengaku badan diagonal, pengaku badan vertikal, kekuatan, kekakuan, daktilitas dan energi dissipasi.

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