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Rocking damage-free steel column base with friction devices: design procedure and global seismic response of buildings

Freddi, F; Dimopoulos, C; Karavasilis, TL; (2017) Rocking damage-free steel column base with friction devices: design procedure and global seismic response of buildings. In: Proceedings of Eurosteel 2017. (pp. pp. 3033-3042). Ernst & Sohn: Berlin, Germany. Green open access

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Abstract

Resilient minimal-damage steel frames, such as post-tensioned self-centering steel frames or steel frames with passive dampers, have been extensively studied but little attention has been paid to their column bases. This paper presents a rocking damage-free steel column base using post-tensioned high strength steel bars to control rocking behavior and friction devices that provide stable energy dissipation capacity. Contrary to conventional steel column bases, the monotonic and cyclic hysteretic moment-rotation behavior of the proposed column base can be easily described using simple analytical equations. The paper describes in detail a step-by-step design procedure for the column base that ensures damage-free behavior and adequate self-centering and energy dissipation capacity. A finite element model for the column base is developed in OpenSees and used to conduct nonlinear dynamic (seismic) analyses of a building using self-centering steel moment-resisting frames. The results of the analyses show that the column base helps the building to avoid damage in the 1st story columns along with eliminating the 1st story residual drifts under both the design and maximum considered earthquake intensities.

Type: Proceedings paper
Title: Rocking damage-free steel column base with friction devices: design procedure and global seismic response of buildings
Event: Eurosteel 2017, 8th European Conference on Steel and Composite Structures
Location: Copenhagen, Denmark
Dates: 13 September 2017 - 15 September 2017
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/cepa.355
Publisher version: http://dx.doi.org/10.1002/cepa.355
Language: English
Additional information: © Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin∙ Reproduced with permission.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1575843
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