Experimental investigation of bolted link-to-column connections in eccentrically braced frames

Mohammadrezapour, E.; Danesh, F.

doi:10.1016/j.jcsr.2018.04.009

Cited by 5 publications

(2 citation statements)

References 16 publications

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“…Saat terjadi beban gempa, link pada EBF akan berfungsi sebagai sekring daktail, berotasi plastis sementara komponen struktur lain akan tetap elastis [3], [4]. Sistem ini menyediakan kekakuan seperti rangka bresing konsentrik (CBF) dan juga memiliki daya serap energi seperti rangka penahan momen (MRF) [5], Sehingga sistem ini bisa disebut dengan sistem hybrid. Terdapat 3 tipe link yaitu link geser, menengah, dan lentur [6].…”

Section: Pendahuluanunclassified

Studi Numerik Performa Rangka Bresing Eksentrik Link Vertikal Profil Tubular

Muhammad

Suswanto

2020

JITS

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Eccentrically Braced Frames (EBF) have been used as earthquake suppression systems, especially in buildings. This system relies on yielding at link. EBF with horizontal link has important weaknesses to review. In the event of an earthquake that causes the link beam to rotate vertically, causing the structure above the beam damaged. Also it is not easy to repair the beam link at H-EBF after a severe earthquake. To overcome the problems in the H-EBF system, a new system was proposed, called Vertical-EBF (V-EBF). Links with WF and tubular profiles are two profiles commonly used in structures. In this research, EBF specimen modeling with tubular profile vertical links was compared with EBF horizontal links. The results showed a structure with V-EBF had a lighter weight. Yielding only occur at link so its better for earthquake rehabilitation.Kata kunci: rangka bresing eksentrik, rehabilitasi gempa, metode elemen hingga, kurva histeresis AbstrakEccentrically Braced Frames (EBF) telah digunakan sebagai sistem penahan beban gempa, terutama pada bangunan gedung. Sistem ini mengandalkan pada lelehnya link terlebih dahulu. EBF dengan link horizontal (H-EBF) memiliki kelemahan yang penting untuk ditinjau. Pada saat terjadi gempa bumi yang menyebabkan link balok akan memutar secara vertikal sehingga menyebabkan struktur diatas balok akan rusak. Selain itu tidak mudah memperbaiki link balok di H-EBF setelah gempa bumi yang parah. Untuk mengatasi masalah dalam sistem H-EBF, terdapat sistem yang telah diusulkan, disebut Vertikal-EBF (V-EBF). Link dengan profil WF dan tubular adalah dua profil yang biasa digunakan pada struktur. Pada penelitian ini dilakukan pemodelan spesimen EBF link horizontal dibandingkan dengan EBF dengan link vertikal berprofil tubular. Hasil penelitian menunjukkan struktur dengan V-EBF memiliki berat lebih ringan. Pelelehan pada V-EBF hanya terjadi pada bagian link sehingga lebih baik dalam rehabilitasi gempa.

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Section: Pendahuluanunclassified

Studi Numerik Performa Rangka Bresing Eksentrik Link Vertikal Profil Tubular

Muhammad

Suswanto

2020

JITS

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“…The different types of EBF with beam links were experimentally and analytically studied by [17,18] and it was concluded that such systems offer higher ductility and better lateral displacement resistance under seismic loading. Research in the literature [5,6,[19][20][21][22][23][24][25][26] explains the collapse performance of steel CBF and EBF structures, which assisted the optimized design of concentrically braced frames. Some authors used a force-based design approach, while others used a displacement-based design approach.…”

Section: Introductionmentioning

confidence: 99%

Column Link Behavior in Eccentrically Braced Composite 3-Dimensional Frames

Reena G.,

Gurupatham,

Tsavdaridis

2023

Buildings

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Eccentrically braced frames are renowned for their capacity to absorb seismic forces while offering greater adaptability. These frames incorporate bracings that are joined to the beams with an intentional offset, forming a connection within the beams. Nevertheless, there are drawbacks associated with implementing these beam connections when renovating frames. This paper seeks to enhance the design approach by introducing an eccentric link within the column of a composite structure. Eccentric braced frames (EBFs) are hybrid systems that offer both ductility in moment resisting frames (MRFs) and lateral stiffening in the concentrically braced system. The study examines composite frames with 5, 10, and 15 stories using eccentric X- and V-type bracings with an eccentricity of 0.5 m and 1 m. Three different earthquake zones are considered, based on Indian seismic code provisions: zone 3, zone 4, and zone 5. The structures are analyzed computationally by nonlinear time history analyses. The lateral load-resisting behavior of the structure with the same eccentricity in beam links and column links is compared. Then, the structure is subjected to a pushover analysis to study the performance characteristics such as capacity curve, lateral displacement, inter-storey drift, and plastification of the structure. As anticipated, compared to conventional moment resisting frames (MRFs) and concentrically braced frames (CBFs), eccentrically braced frames have better energy dissipation. Furthermore, the behavior of X-braced column links is found to be similar to the performance of beam links, but V-braced frames showed better performance in column link frames than in beam link frames. Also, the increase of the link length played a major role in the ductility of the frames.

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