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Column Link Behavior in Eccentrically Braced Composite 3-Dimensional Frames

Reena, C. G., Gurupatham, B. G. A. & Tsavdaridis, K. D. ORCID: 0000-0001-8349-3979 (2023). Column Link Behavior in Eccentrically Braced Composite 3-Dimensional Frames. Buildings, 13(12), article number 2970. doi: 10.3390/buildings13122970


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 in-tentional offset, forming a connection within the beams. Nevertheless, there are drawbacks asso-ciated 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 ex-amines 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 dis-placement, inter-storey drift, and plastification of the structure. As anticipated, compared to con-ventional 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.

Publication Type: Article
Additional Information: Copyright: © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
Publisher Keywords: eccentric bracings; column link; beam link; composite frames; pushover analysis; performance-based design
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Departments: School of Science & Technology > Engineering
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