Pushover analysis for estimating seismic demand of elliptic braced moment resisting frames

Ghasemi Jouneghani, H; Haghollahi, A; Mortazavi, M

Pushover analysis for estimating seismic demand of elliptic braced moment resisting frames

Ghasemi Jouneghani, H Haghollahi, A Mortazavi, M

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Publisher:: Croatian Association of Civil Engineers
Publication Type:: Journal Article
Citation:: Gradjevinar, 2022, 74, (11), pp. 941-955
Issue Date:: 2022-01-01

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Field	Value	Language
dc.contributor.author	Ghasemi Jouneghani, H
dc.contributor.author	Haghollahi, A
dc.contributor.author	Mortazavi, M https://orcid.org/0000-0001-5123-7903
dc.contributor.editor	Lakusic, S
dc.date.accessioned	2023-07-08T00:57:04Z
dc.date.available	2023-07-08T00:57:04Z
dc.date.issued	2022-01-01
dc.identifier.citation	Gradjevinar, 2022, 74, (11), pp. 941-955
dc.identifier.issn	0350-2465
dc.identifier.issn	1333-9095
dc.identifier.uri	http://hdl.handle.net/10453/171325
dc.description.abstract	In this paper, an innovative steel bracing system, known as the seismic response of elliptic braced moment resisting frame (ELBRF), is evaluated. ELBRF has a better structural behavior comparing to the other bracing systems and it has an architectural advantage allowing to place openings in walls with less interference. The demand for seismic performance of ELBRF is estimated through different loading patterns by adopting the conventional pushover methods. The pushover results are verified through nonlinear time history analysis (NTHAs) of 3, 5, 7, and 10-story ELBRF frames, which are on type II soil and are affected by 10 scaled earthquake records. These results are also with special moment resisting frames (SMRF) and X-Braced CBF and Inverted V-Braced CBF concentrically braced frames. Story drifts, displacements, and story shears are evaluated. A proportionally accurate estimation is observed through the pushover methods in comparison with NTHAs. Modal Pushover Analysis (MPA) can estimate the seismic demands by overcoming the shortcomings of FEMA load distributions when the higher mode effects are of concern. The seismic performance of the ELBRF system against earthquakes has improved, failure is transmitted to the upper stories, and the response modification factor is increased in ELBRF.
dc.language	en
dc.publisher	Croatian Association of Civil Engineers
dc.relation.ispartof	Gradjevinar
dc.relation.isbasedon	10.14256/JCE.2311.2017
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Civil Engineering
dc.subject.classification	4005 Civil engineering
dc.title	Pushover analysis for estimating seismic demand of elliptic braced moment resisting frames
dc.type	Journal Article
utslib.citation.volume	74
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-07-08T00:57:00Z
pubs.issue	11
pubs.publication-status	Published
pubs.volume	74
utslib.citation.issue	11

Abstract:

In this paper, an innovative steel bracing system, known as the seismic response of elliptic braced moment resisting frame (ELBRF), is evaluated. ELBRF has a better structural behavior comparing to the other bracing systems and it has an architectural advantage allowing to place openings in walls with less interference. The demand for seismic performance of ELBRF is estimated through different loading patterns by adopting the conventional pushover methods. The pushover results are verified through nonlinear time history analysis (NTHAs) of 3, 5, 7, and 10-story ELBRF frames, which are on type II soil and are affected by 10 scaled earthquake records. These results are also with special moment resisting frames (SMRF) and X-Braced CBF and Inverted V-Braced CBF concentrically braced frames. Story drifts, displacements, and story shears are evaluated. A proportionally accurate estimation is observed through the pushover methods in comparison with NTHAs. Modal Pushover Analysis (MPA) can estimate the seismic demands by overcoming the shortcomings of FEMA load distributions when the higher mode effects are of concern. The seismic performance of the ELBRF system against earthquakes has improved, failure is transmitted to the upper stories, and the response modification factor is increased in ELBRF.

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http://hdl.handle.net/10453/171325