Elastic-plastic behavior of AP1000 nuclear island structure under mainshock-aftershock sequences

Wang, D; Wu, C; Zhang, Y; Ding, Z; Chen, W

Elastic-plastic behavior of AP1000 nuclear island structure under mainshock-aftershock sequences

Wang, D

Wu, C

Zhang, Y Ding, Z Chen, W

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Publication Type:: Journal Article
Citation:: Annals of Nuclear Energy, 2019, 123 pp. 1 - 17
Issue Date:: 2019-01-01

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Field	Value	Language
dc.contributor.author	Wang, D https://orcid.org/0000-0001-6159-8817	en_US
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934	en_US
dc.contributor.author	Zhang, Y	en_US
dc.contributor.author	Ding, Z	en_US
dc.contributor.author	Chen, W	en_US
dc.date.issued	2019-01-01	en_US
dc.identifier.citation	Annals of Nuclear Energy, 2019, 123 pp. 1 - 17	en_US
dc.identifier.issn	0306-4549	en_US
dc.identifier.uri	http://hdl.handle.net/10453/138783
dc.description.abstract	© 2018 Elsevier Ltd This paper studies dynamic responses of AP1000 nuclear island structure in strong earthquake sequences. A numerical model to simulate nuclear structural behaviors in earthquake is validated by comparison with data from a previous study on a nonlinear dynamic analysis of a reinforced concrete shield building. The validated numerical model is then used to carry out a series of parametric analyses with 112 computational cases so as to determine influence of strong aftershocks on structural elastic-plastic behavior considering input of three-dimensional ground motions. The results indicate that the influence of aftershocks on structural horizontal/vertical dynamic responses is very small in design basis earthquake sequences. However, the influence must be considered seriously in beyond-design basis earthquake sequences as values of RMVs (Ratio of Mean Value) deviating IPRs (Input Peak Ratio) obviously, which means structural dynamic responses are greatly changed in strong aftershocks. Damage aggravating effect induced by strong aftershocks can cause severe damage of structural members and it is found the greater the magnitude of aftershocks, the severer the aggravation effect. Although earthquake input energy is mostly dissipated by damping energy, plastic damage energy plays considerable role in strong aftershocks as it shares beyond 8 percent of the total input energy, which is 10 times more compared to design basis earthquake sequences.	en_US
dc.relation.ispartof	Annals of Nuclear Energy	en_US
dc.relation.isbasedon	10.1016/j.anucene.2018.09.015	en_US
dc.subject.classification	Energy	en_US
dc.title	Elastic-plastic behavior of AP1000 nuclear island structure under mainshock-aftershock sequences	en_US
dc.type	Journal Article
utslib.citation.volume	123	en_US
utslib.for	0406 Physical Geography and Environmental Geoscience	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0299 Other Physical Sciences	en_US
utslib.for	0915 Interdisciplinary Engineering	en_US
pubs.embargo.period	Not known	en_US
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
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	123	en_US

Abstract:

© 2018 Elsevier Ltd This paper studies dynamic responses of AP1000 nuclear island structure in strong earthquake sequences. A numerical model to simulate nuclear structural behaviors in earthquake is validated by comparison with data from a previous study on a nonlinear dynamic analysis of a reinforced concrete shield building. The validated numerical model is then used to carry out a series of parametric analyses with 112 computational cases so as to determine influence of strong aftershocks on structural elastic-plastic behavior considering input of three-dimensional ground motions. The results indicate that the influence of aftershocks on structural horizontal/vertical dynamic responses is very small in design basis earthquake sequences. However, the influence must be considered seriously in beyond-design basis earthquake sequences as values of RMVs (Ratio of Mean Value) deviating IPRs (Input Peak Ratio) obviously, which means structural dynamic responses are greatly changed in strong aftershocks. Damage aggravating effect induced by strong aftershocks can cause severe damage of structural members and it is found the greater the magnitude of aftershocks, the severer the aggravation effect. Although earthquake input energy is mostly dissipated by damping energy, plastic damage energy plays considerable role in strong aftershocks as it shares beyond 8 percent of the total input energy, which is 10 times more compared to design basis earthquake sequences.

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http://hdl.handle.net/10453/138783