Freddi, F;
Dimopoulos, C;
Karavasilis, TL;
(2017)
Rocking damage-free steel column base with friction devices.
In:
Proceedings of the 9th Hellenic National Conference of Steel Structures.
Steel Structures Research Society (SSRS): Larisa, Greece.
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Abstract
Earthquake resilient steel frames, such as frames with self-centering connections or frames with passive energy dissipation devices, have been extensively studied during the past decade but little attention has been paid to their column bases. The paper presents a rocking damage-free steel column base, which uses post-tensioned (PT) high strength steel bars to control rocking behavior and friction devices to dissipate seismic energy. Contrary to conventional steel column bases, the rocking column base exhibits monotonic and cyclic moment-rotation behaviors that are easily described using simple analytical equations. Analytical equations are provided for different cases including yielding or loss of posttensioning in the PT bars and their efficiency is compared with numerical results from a three-dimensional non-linear finite element (FE) model in ABAQUS. Moreover, a simplified model is developed in OpenSees to evaluate how the use of the rocking column base affects the global behavior of a self-centering moment-resisting frame. Nonlinear dynamic analyses show that the rocking column base fully protects the first story columns from yielding and eliminate the first story residual story drift.
| Type: | Proceedings paper |
|---|---|
| Title: | Rocking damage-free steel column base with friction devices |
| Event: | 9th Hellenic National Conference of Steel Structures |
| Location: | Larisa, Greece |
| Dates: | 05 October 2017 - 07 October 2017 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://eeme.ntua.gr/9HNCSS/en/index.html |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL 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/1575845 |
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