Column Link Behavior in Eccentrically Braced Composite 3-Dimensional Frames
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 wit...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/12/2970 |
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| author | Celine Reena G. Beulah Gnana Ananthi Gurupatham Konstantinos Daniel Tsavdaridis |
| author_facet | Celine Reena G. Beulah Gnana Ananthi Gurupatham Konstantinos Daniel Tsavdaridis |
| author_sort | Celine Reena G. |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-08T20:56:39Z |
| format | Article |
| id | doaj.art-4b2f9f532f594acb93d06656bfaa416e |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-08T20:56:39Z |
| publishDate | 2023-11-01 |
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| record_format | Article |
| series | Buildings |
| spelling | doaj.art-4b2f9f532f594acb93d06656bfaa416e2023-12-22T13:58:02ZengMDPI AGBuildings2075-53092023-11-011312297010.3390/buildings13122970Column Link Behavior in Eccentrically Braced Composite 3-Dimensional FramesCeline Reena G.0Beulah Gnana Ananthi Gurupatham1Konstantinos Daniel Tsavdaridis2Department of Civil Engineering, College of Engineering, Guindy, Anna University, Chennai 600 025, IndiaDepartment of Civil Engineering, College of Engineering, Guindy, Anna University, Chennai 600 025, IndiaDepartment of Engineering, School of Science & Technology, City, University London, Northampton Square, London EC1V 0HB, UKEccentrically 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.https://www.mdpi.com/2075-5309/13/12/2970eccentric bracingscolumn linkbeam linkcomposite framespushover analysisperformance-based design |
| spellingShingle | Celine Reena G. Beulah Gnana Ananthi Gurupatham Konstantinos Daniel Tsavdaridis Column Link Behavior in Eccentrically Braced Composite 3-Dimensional Frames Buildings eccentric bracings column link beam link composite frames pushover analysis performance-based design |
| title | Column Link Behavior in Eccentrically Braced Composite 3-Dimensional Frames |
| title_full | Column Link Behavior in Eccentrically Braced Composite 3-Dimensional Frames |
| title_fullStr | Column Link Behavior in Eccentrically Braced Composite 3-Dimensional Frames |
| title_full_unstemmed | Column Link Behavior in Eccentrically Braced Composite 3-Dimensional Frames |
| title_short | Column Link Behavior in Eccentrically Braced Composite 3-Dimensional Frames |
| title_sort | column link behavior in eccentrically braced composite 3 dimensional frames |
| topic | eccentric bracings column link beam link composite frames pushover analysis performance-based design |
| url | https://www.mdpi.com/2075-5309/13/12/2970 |
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