Development of detachable replaceable links for eccentrically braced frames

Date

2019-08-01

Author

Bozkurt, Mehmet Bakir
Azad, Sina Kazemzadeh
Topkaya, Cem

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Eccentrically braced frames (EBFs) can be repaired after a major earthquake by replacing the links. The link replacement is not a straightforward process and is influenced by the type of the link and the amount of residual frame deformations. The past decade has witnessed the development of different types of replaceable links such as end-plated links, web connected links, bolted flange and web spliced links, and collector beam and brace spliced links. All of the developed replaceable link details, except the web connected links, are not suitable for link replacement under residual frame drift. In this paper, a detachable replaceable link detail which is based on splicing the link at its mid-length is proposed. The detail is well suited for installation under residual frame drifts. In addition, the weight and size of the members to be transported and erected are reduced significantly, thereby facilitating the replacement procedure. Performance of this proposed replaceable link is studied by conducting six nearly full scale EBF tests under quasi-static cyclic loading. The link length ratio, type of end-plated mid-splice connection, and the amount of residual drift are considered as test variables. The test results revealed that the inelastic rotation capacity of the detachable replaceable links exceeds the requirements of the AISC Seismic Provisions for Structural Steel Buildings. No failures are observed in the end-plated mid-splice connections demonstrating the potential of the proposed details. The detachable replaceable links are investigated by numerical analysis as well to further validate their applicability and to develop design recommendations.

Subject Keywords

Eccentrically braced frame, Experimental testing, Inelastic rotations, Post-earthquake repair, Replaceable link, Residual drift, Detachable

URI

https://hdl.handle.net/11511/32951

Journal

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS

DOI

https://doi.org/10.1002/eqe.3181

Collections

Department of Civil Engineering, Article

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Splice Connection Details for Eccentrically Braced Frame Replaceable Links Topkaya, Cem (null; 2019-09-20) Eccentrically braced frames (EBFs) can be used as a lateral load resisting system in seismic prone regions. A typical EBF consists of links, beams, columns and braces. Links are the fuse members providing energy dissipation during an earthquake. After a seismic event, damaged links need to be replaced with the new ones to recover initial stiffness and ductility of the structure. A comprehensive experimental research program has been undertaken to develop new replaceable link details. One of the proposed det...

Citation Formats

M. B. Bozkurt, S. K. Azad, and C. Topkaya, “Development of detachable replaceable links for eccentrically braced frames,” EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, pp. 1134–1155, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32951.