Seismic Behaviour of Eccentrically Braced Frame with Vertical Link

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Osat, Vahid; Darvishan, Ehsan; Ashoori, Morteza

Seismic Behaviour of Eccentrically Braced Frame with Vertical Link Journal Article

Mechanics, Materials Science & Engineering, 11 (1), 2017, ISSN: 2412-5954.

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Authors: Vahid Osat, Ehsan Darvishan, Morteza Ashoori

ABSTRACT. The design of an eccentrically braced frame is based on providing a weak section in frame which will remain essentially elastic outside a well define link. Eccentrically braced frames combine stiffness of centrically braced frame with ductility and capability to dissipate seismic energy of moment resistant frame. In this paper the seismic behavior of eccentrically braced frame with vertical link is presented. Three regular frame with vertical link which its length is correlated to the capability to dissipate seismic energy are considered. The analytical models used to simulate the test through inelastic time history analyses that is performed in OpenSees software and simulation results were obtained. The results indicated that by reducing the vertical link length in EBFs, the maximum lateral displacements of roofs have been reduced for all frames due to 5 real earthquake records. Reducing the vertical link length decreases the maximum base shear of the structure. Therefore, it can be said that vertical link length improved the seismic performance of the EBFs.

Keywords: steel, eccentrically braced frame, vertical link, time history, seismic performance, nonlinear analysis

DOI 10.2412/mmse.25.78.451


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