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A hybrid force/displacement seismic design method for steel structures

A hybrid force/displacement seismic design method for steel structures
A hybrid force/displacement seismic design method for steel structures
This paper proposes a performance-based seismic design methodology for steel building frames which combines the advantages of the well-known force-based and displacement-based seismic design methods in a hybrid force/displacement design scheme. The proposed method controls structural performance by first transforming user-specified values of the interstorey drift ratio (non-structural damage) and local ductility (structural damage) to a target roof displacement and then, calculating the appropriate strength reduction factor for limiting ductility demands associated with the target roof displacement. The main characteristics of the proposed method are: (1) treats both drift and ductility demands as input variables for the initiation of the design process; (2) does not use a substitute single degree of freedom system; (3) makes use of current seismic code approaches as much as possible (e.g., conventional elastic response spectrum analysis and design); (4) includes the influence of the number of stories; (5) recognises the influence of the type of the lateral load resisting system (moment resisting frame or concentrically braced frame); (6) recognises the influence of geometrical (setbacks) or mass irregularities. A realistic design example serves to demonstrate the advantages of the proposed method over the currently used force-based design procedure.
0141-0296
1452-1453
Tzimas, A.
533c0c41-47d7-41d4-bae3-f5e2f337a5eb
Karavasilis, T.L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Bazeos, N.
a7030733-6d22-4723-860c-71f0e0d4a53c
Beskos, D.E.
9fa0ddd7-599f-46b3-953b-0b1950992c87
Tzimas, A.
533c0c41-47d7-41d4-bae3-f5e2f337a5eb
Karavasilis, T.L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Bazeos, N.
a7030733-6d22-4723-860c-71f0e0d4a53c
Beskos, D.E.
9fa0ddd7-599f-46b3-953b-0b1950992c87

Tzimas, A., Karavasilis, T.L., Bazeos, N. and Beskos, D.E. (2013) A hybrid force/displacement seismic design method for steel structures. Engineering Structures, 56, 1452-1453. (doi:10.1016/j.engstruct.2013.07.014).

Record type: Article

Abstract

This paper proposes a performance-based seismic design methodology for steel building frames which combines the advantages of the well-known force-based and displacement-based seismic design methods in a hybrid force/displacement design scheme. The proposed method controls structural performance by first transforming user-specified values of the interstorey drift ratio (non-structural damage) and local ductility (structural damage) to a target roof displacement and then, calculating the appropriate strength reduction factor for limiting ductility demands associated with the target roof displacement. The main characteristics of the proposed method are: (1) treats both drift and ductility demands as input variables for the initiation of the design process; (2) does not use a substitute single degree of freedom system; (3) makes use of current seismic code approaches as much as possible (e.g., conventional elastic response spectrum analysis and design); (4) includes the influence of the number of stories; (5) recognises the influence of the type of the lateral load resisting system (moment resisting frame or concentrically braced frame); (6) recognises the influence of geometrical (setbacks) or mass irregularities. A realistic design example serves to demonstrate the advantages of the proposed method over the currently used force-based design procedure.

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More information

Accepted/In Press date: 8 July 2013
e-pub ahead of print date: 14 August 2013
Published date: November 2013
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 401609
URI: https://eprints.soton.ac.uk/id/eprint/401609
ISSN: 0141-0296
PURE UUID: d8d10d3c-bb3e-4473-83e6-3fc52342cc9b
ORCID for T.L. Karavasilis: ORCID iD orcid.org/0000-0003-2553-5389

Catalogue record

Date deposited: 19 Oct 2016 15:44
Last modified: 15 Jul 2019 20:00

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