Abstract
Eccentrically Braced Frame (EBF) is a better option for the earthquake-prone country due to it having a better strength, stiffness, energy dissipation and ductility than Moment Resisting Frame (MRF) structure and more so than structures made of concrete. The structure’s ductility was influenced by the cross-sectional dimension and link element of the frame. This study aims to determine the relation behavior of EBF with the varied link element and cross-sectional of bracing with the ultimate load and ductility of the structure. The analysis was done using MSC. PATRAN/NASTRAN student edition software. A total of three-link model variations, each one represents the three-link variations of EBF; short link, intermediate link, and long link. As for the cross-sectional, variation was made on the flange and web thickness of the IWF profile and web thickness of the HSS profile. The most optimum performance of the structure was determined by displacement control and static monotonic loading. The result indicates that variations in the crosssectional of bracing effects the short link EBF the most, while the intermediate and long link EBF doesn’t show a significant change in terms of ultimate load. Meanwhile, ductility is not bound by the increase of bracing thickness.
Highlights
Indonesia is one of the countries with a high intensity of earthquakes caused by its geographical location, which is between 3 earthen plates; Indo-Australian, Euroasia, and Pacific
The steel structure can be formed as a frame, which is a system composed of structural sections connected that are used to resisting load as one completed structure with and without horizontal diaphragms or plates system
The structure analysed in this paper is eccentrically braced frames of short link, intermediate link, and long link
Summary
Indonesia is one of the countries with a high intensity of earthquakes caused by its geographical location, which is between 3 earthen plates; Indo-Australian, Euroasia, and Pacific These earthquakes caused damages in concrete buildings and infrastructure. Each type has different behavior as well as strength and ductility, but for the earthquake-prone country, EBF has the best value in both aspects. EBF has been proven to be the best in strength, stiffness, ductility, and energy dissipation system compared to the other frames [1]. The link element provides a weak section in the frame for plastic deformation capacity and energy dissipation released by earthquake. Flexural Dominant Link (Long Link), 2,6 Mp/Vp ≤ e This link yield because of flexural dominant (on a combination of shear and flexural) on response/inelastic deformation. The effect of variation of the bracing section on eccentrically braced frame’s ultimate load, ultimate displacement, and ductility will be analysed
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