Assessment of capacity design of columns in steel moment resisting frames with viscous dampers
Assessment of capacity design of columns in steel moment resisting frames with viscous dampers
Previous research showed that steel moment-resisting frames (MRFs) with viscous dampers may experience column plastic hinges under strong earthquakes and highlighted the need to further assess the efficiency of capacity design rules. To partially address this need, three alternatives of a prototype building having five, 10 and 20 stories are designed according to Eurocode 8 using either steel MRFs or steel MRFs with dampers. Incremental dynamic analysis (IDA) is conducted for all MRFs and their collapse resistance and plastic mechanism is evaluated. The results show that steel MRFs with dampers are prone to column plastic hinging in comparison to steel MRFs. The steel MRFs with dampers are then iteratively re-designed with stricter capacity design rules to achieve a plastic mechanism that is approximately similar to that of steel MRFs. The performance of these re-designed steel MRFs with dampers indicates, that overall, enforcement of stricter capacity design rules for columns is not justified neither from a collapse resistance or a reparability perspective.
215-222
Karavasilis, T.L.
93e918b4-9b5e-458e-b95e-8f40c10f65f5
September 2016
Karavasilis, T.L.
93e918b4-9b5e-458e-b95e-8f40c10f65f5
Karavasilis, T.L.
(2016)
Assessment of capacity design of columns in steel moment resisting frames with viscous dampers.
Soil Dynamics and Earthquake Engineering, 88, .
(doi:10.1016/j.soildyn.2016.06.006).
Abstract
Previous research showed that steel moment-resisting frames (MRFs) with viscous dampers may experience column plastic hinges under strong earthquakes and highlighted the need to further assess the efficiency of capacity design rules. To partially address this need, three alternatives of a prototype building having five, 10 and 20 stories are designed according to Eurocode 8 using either steel MRFs or steel MRFs with dampers. Incremental dynamic analysis (IDA) is conducted for all MRFs and their collapse resistance and plastic mechanism is evaluated. The results show that steel MRFs with dampers are prone to column plastic hinging in comparison to steel MRFs. The steel MRFs with dampers are then iteratively re-designed with stricter capacity design rules to achieve a plastic mechanism that is approximately similar to that of steel MRFs. The performance of these re-designed steel MRFs with dampers indicates, that overall, enforcement of stricter capacity design rules for columns is not justified neither from a collapse resistance or a reparability perspective.
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Accepted/In Press date: 15 June 2016
e-pub ahead of print date: 28 June 2016
Published date: September 2016
Organisations:
Infrastructure Group
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Local EPrints ID: 401602
URI: http://eprints.soton.ac.uk/id/eprint/401602
ISSN: 0267-7261
PURE UUID: c3147968-ec8e-492b-91d0-7e0ecd979800
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Date deposited: 18 Oct 2016 15:25
Last modified: 15 Mar 2024 02:51
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T.L. Karavasilis
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