Seismic response of cable stayed bridges under multi support excitation

In this Study, the seismic response of cable stayed bridges have been evaluated under multi-support excitations. There are three sources that cause the earthquake wave characteristics change during its propagation path. Local site effect, loss of coherency and wave passage effect are three sources o...

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Autores principales:	Mahmoud Reza ُُShiravand, Parsa Parvanehro, Sina Bagheri
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2017
Materias:	multi-support excitation cable stayed bridge kriging method spatial variation of ground motion earthquake Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/87c5fd32c8394addb40874e9f9211330
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spelling	oai:doaj.org-article:87c5fd32c8394addb40874e9f92113302021-11-08T15:47:38ZSeismic response of cable stayed bridges under multi support excitation2476-39772538-261610.22065/jsce.2017.87901.1216https://doaj.org/article/87c5fd32c8394addb40874e9f92113302017-07-01T00:00:00Zhttps://www.jsce.ir/article_46859_f60f422a816eaf169ce7388da3a14b94.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616In this Study, the seismic response of cable stayed bridges have been evaluated under multi-support excitations. There are three sources that cause the earthquake wave characteristics change during its propagation path. Local site effect, loss of coherency and wave passage effect are three sources of spatial variation of seismic ground motions. In long span structures, such as cable supported bridges, this phenomenon is more evident and traditional analyzing (uniform excitation) may not be valid and be conservative. Thus, it is necessary to investigate the response of cable stayed bridges under non-uniform excitations. For this purpose, the non-uniform time histories were artificially generated using Kriging method based on a set of known time history in the west support of bridge. Nonlinear time history analysis was performed and cables axial force, deck moment, pylons moment and finally drift ratio of bridge have been examined in order to investigate how non-uniform excitation change the seismic response of bridge compared with uniform excitations. Results show non-uniform excitation in some bridge components increase responses and decreases in the others. In non-uniform excitation, although total time history energy is lesser than uniform excitation, it can significantly change the distribution of the forces and makes differential displacement between cables supports and increase the possibility of failure.Mahmoud Reza ُُShiravandParsa ParvanehroSina BagheriIranian Society of Structrual Engineering (ISSE)articlemulti-support excitationcable stayed bridgekriging methodspatial variation of ground motionearthquakeBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 4, Iss شماره ویژه 1, Pp 58-69 (2017)
institution	DOAJ
collection	DOAJ
language	FA
topic	multi-support excitation cable stayed bridge kriging method spatial variation of ground motion earthquake Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	multi-support excitation cable stayed bridge kriging method spatial variation of ground motion earthquake Bridge engineering TG1-470 Building construction TH1-9745 Mahmoud Reza ُُShiravand Parsa Parvanehro Sina Bagheri Seismic response of cable stayed bridges under multi support excitation
description	In this Study, the seismic response of cable stayed bridges have been evaluated under multi-support excitations. There are three sources that cause the earthquake wave characteristics change during its propagation path. Local site effect, loss of coherency and wave passage effect are three sources of spatial variation of seismic ground motions. In long span structures, such as cable supported bridges, this phenomenon is more evident and traditional analyzing (uniform excitation) may not be valid and be conservative. Thus, it is necessary to investigate the response of cable stayed bridges under non-uniform excitations. For this purpose, the non-uniform time histories were artificially generated using Kriging method based on a set of known time history in the west support of bridge. Nonlinear time history analysis was performed and cables axial force, deck moment, pylons moment and finally drift ratio of bridge have been examined in order to investigate how non-uniform excitation change the seismic response of bridge compared with uniform excitations. Results show non-uniform excitation in some bridge components increase responses and decreases in the others. In non-uniform excitation, although total time history energy is lesser than uniform excitation, it can significantly change the distribution of the forces and makes differential displacement between cables supports and increase the possibility of failure.
format	article
author	Mahmoud Reza ُُShiravand Parsa Parvanehro Sina Bagheri
author_facet	Mahmoud Reza ُُShiravand Parsa Parvanehro Sina Bagheri
author_sort	Mahmoud Reza ُُShiravand
title	Seismic response of cable stayed bridges under multi support excitation
title_short	Seismic response of cable stayed bridges under multi support excitation
title_full	Seismic response of cable stayed bridges under multi support excitation
title_fullStr	Seismic response of cable stayed bridges under multi support excitation
title_full_unstemmed	Seismic response of cable stayed bridges under multi support excitation
title_sort	seismic response of cable stayed bridges under multi support excitation
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2017
url	https://doaj.org/article/87c5fd32c8394addb40874e9f9211330
work_keys_str_mv	AT mahmoudrezashiravand seismicresponseofcablestayedbridgesundermultisupportexcitation AT parsaparvanehro seismicresponseofcablestayedbridgesundermultisupportexcitation AT sinabagheri seismicresponseofcablestayedbridgesundermultisupportexcitation
_version_	1718441680277864448

Seismic response of cable stayed bridges under multi support excitation

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