Stochastic uncertainty quantification of seismic performance of complex large-scale structures using response spectrum method

Zhang, H; Zhu, X; Liang, X; Guo, F

Stochastic uncertainty quantification of seismic performance of complex large-scale structures using response spectrum method

Zhang, H Zhu, X

Liang, X Guo, F

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Engineering Structures, 2021, 235, pp. 1-16
Issue Date:: 2021-05-15

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Field	Value	Language
dc.contributor.author	Zhang, H
dc.contributor.author	Zhu, X https://orcid.org/0000-0001-5083-9320
dc.contributor.author	Liang, X
dc.contributor.author	Guo, F
dc.date.accessioned	2022-04-12T05:09:28Z
dc.date.available	2022-04-12T05:09:28Z
dc.date.issued	2021-05-15
dc.identifier.citation	Engineering Structures, 2021, 235, pp. 1-16
dc.identifier.issn	0141-0296
dc.identifier.issn	1873-7323
dc.identifier.uri	http://hdl.handle.net/10453/156122
dc.description.abstract	Imprecision and uncertainty always exist in engineering structures. In recent years, an increasing emphasis is placed on quantifying structural performance by explicitly modeling uncertainties. A limited number of studies have been conducted on the uncertain analysis of complex structures. Because the time-history response analysis (THRA) is extremely time-consuming to solve uncertain problems of complex structures, a stochastic finite element method (SFEM) using response spectrum analysis (RSA) has been developed to analyze full-scale lattice dome structures with uncertain variables in this paper. Based on the proposed method, the lattice dome structure under different earthquake intensity levels is investigated and the probabilistic structural demands are quantified. Compared with the perfect dome, the results show that the mean deformations and reaction force values at supports caused by earthquakes increase in the uncertain dome and the mean axial force values of the members decrease. The structural demands present larger uncertain intervals with the increase in earthquake intensity, thus, the calculation results in the deterministic analyses can be further improved by the uncertainty quantification. Finally, the effects of uncertain variables on the structural demands are discussed. Unlike the findings in the THRA, the structural imperfections are the most important factor affecting structural performance in the RSA. Moreover, compared with THRA, a larger sample size can be used in the RSA to predict the seismic performance of complex structures with higher precision. This study provides possible applications for the probability-based performance analysis of other large-scale structures with uncertain parameters.
dc.language	English
dc.publisher	Elsevier
dc.relation.ispartof	Engineering Structures
dc.relation.isbasedon	10.1016/j.engstruct.2021.112096
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0905 Civil Engineering, 0912 Materials Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	Civil Engineering
dc.title	Stochastic uncertainty quantification of seismic performance of complex large-scale structures using response spectrum method
dc.type	Journal Article
utslib.citation.volume	235
utslib.for	0905 Civil Engineering
utslib.for	0912 Materials Engineering
utslib.for	0915 Interdisciplinary Engineering
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	open_access	*
pubs.consider-herdc	false
utslib.copyright.embargo	2023-05-15T00:00:00+1000Z
dc.date.updated	2022-04-12T05:09:26Z
pubs.publication-status	Published
pubs.volume	235

Abstract:

Imprecision and uncertainty always exist in engineering structures. In recent years, an increasing emphasis is placed on quantifying structural performance by explicitly modeling uncertainties. A limited number of studies have been conducted on the uncertain analysis of complex structures. Because the time-history response analysis (THRA) is extremely time-consuming to solve uncertain problems of complex structures, a stochastic finite element method (SFEM) using response spectrum analysis (RSA) has been developed to analyze full-scale lattice dome structures with uncertain variables in this paper. Based on the proposed method, the lattice dome structure under different earthquake intensity levels is investigated and the probabilistic structural demands are quantified. Compared with the perfect dome, the results show that the mean deformations and reaction force values at supports caused by earthquakes increase in the uncertain dome and the mean axial force values of the members decrease. The structural demands present larger uncertain intervals with the increase in earthquake intensity, thus, the calculation results in the deterministic analyses can be further improved by the uncertainty quantification. Finally, the effects of uncertain variables on the structural demands are discussed. Unlike the findings in the THRA, the structural imperfections are the most important factor affecting structural performance in the RSA. Moreover, compared with THRA, a larger sample size can be used in the RSA to predict the seismic performance of complex structures with higher precision. This study provides possible applications for the probability-based performance analysis of other large-scale structures with uncertain parameters.

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http://hdl.handle.net/10453/156122