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Self-centering steel column base with metallic energy dissipation devices

Self-centering steel column base with metallic energy dissipation devices
Self-centering steel column base with metallic energy dissipation devices

Column bases of seismic-resistant steel frames are typically designed as full-strength to ensure that plastic hinges develop in the bottom end of the first-storey columns. Alternatively, column bases may be designed as partial-strength and dissipate energy through inelastic deformations in their main components (i.e., base plate, steel anchor rods). Both design philosophies result in difficult-to-repair damage and residual drifts. Moreover, the second design philosophy results in complex hysteretic behaviour with strength and stiffness deterioration. This paper proposes a partial-strength low-damage self-centering steel column base. The column base provides flexibility in the design as its rotational stiffness and moment resistance can be independently tuned. The paper presents an analytical model that predicts the stiffness, strength, and hysteretic behaviour of the column base. In addition, a design procedure and detailed finite element models are presented. The paper evaluates the effectiveness of the column base by carrying out nonlinear dynamic analyses on a prototype steel building designed as post-tensioned self-centering moment-resisting frame. The results demonstrate the potential of the column base to reduce the residual first-storey drifts and protect the first-storey columns from yielding.

Column base, Low-damage, Post-tensioned, Rocking, Seismic resilience, Self-centering
0143-974X
14-30
Kamperidis, Vasileios C.
233b2f8b-28ba-49d0-87c6-3a1cec2ffc6f
Karavasilis, Theodore L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Vasdravellis, George
cc4c93ee-c111-4302-a27e-2d99126a18fc
Kamperidis, Vasileios C.
233b2f8b-28ba-49d0-87c6-3a1cec2ffc6f
Karavasilis, Theodore L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Vasdravellis, George
cc4c93ee-c111-4302-a27e-2d99126a18fc

Kamperidis, Vasileios C., Karavasilis, Theodore L. and Vasdravellis, George (2018) Self-centering steel column base with metallic energy dissipation devices. Journal of Constructional Steel Research, 149, 14-30. (doi:10.1016/j.jcsr.2018.06.027).

Record type: Article

Abstract

Column bases of seismic-resistant steel frames are typically designed as full-strength to ensure that plastic hinges develop in the bottom end of the first-storey columns. Alternatively, column bases may be designed as partial-strength and dissipate energy through inelastic deformations in their main components (i.e., base plate, steel anchor rods). Both design philosophies result in difficult-to-repair damage and residual drifts. Moreover, the second design philosophy results in complex hysteretic behaviour with strength and stiffness deterioration. This paper proposes a partial-strength low-damage self-centering steel column base. The column base provides flexibility in the design as its rotational stiffness and moment resistance can be independently tuned. The paper presents an analytical model that predicts the stiffness, strength, and hysteretic behaviour of the column base. In addition, a design procedure and detailed finite element models are presented. The paper evaluates the effectiveness of the column base by carrying out nonlinear dynamic analyses on a prototype steel building designed as post-tensioned self-centering moment-resisting frame. The results demonstrate the potential of the column base to reduce the residual first-storey drifts and protect the first-storey columns from yielding.

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More information

Accepted/In Press date: 24 June 2018
e-pub ahead of print date: 14 July 2018
Published date: 1 October 2018
Keywords: Column base, Low-damage, Post-tensioned, Rocking, Seismic resilience, Self-centering

Identifiers

Local EPrints ID: 425332
URI: http://eprints.soton.ac.uk/id/eprint/425332
ISSN: 0143-974X
PURE UUID: be3fbfd9-dca5-42ff-bb3f-1a692dff7649
ORCID for Theodore L. Karavasilis: ORCID iD orcid.org/0000-0003-2553-5389

Catalogue record

Date deposited: 12 Oct 2018 16:30
Last modified: 07 Oct 2020 00:13

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Contributors

Author: Vasileios C. Kamperidis
Author: Theodore L. Karavasilis ORCID iD
Author: George Vasdravellis

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