A new probabilistic long-period critical excitation procedure for isolated building structures.
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| Title: | A new probabilistic long-period critical excitation procedure for isolated building structures. |
|---|---|
| Authors: | Bazrafshan, Arsalan1 (AUTHOR), Khaji, Naser2 (AUTHOR) nkhaji@hiroshima-u.ac.jp, Ahmadi, Goodarz3 (AUTHOR) |
| Source: | Mechanics Based Design of Structures & Machines. 2024, Vol. 52 Issue 9, p7063-7091. 29p. |
| Subjects: | Ground motion, Accelerograms, Earthquakes, Stochastic processes, Degrees of freedom |
| Abstract: | The present paper develops a new procedure for finding the most unfavorable long-period excitation for isolated building structures based on the probabilistic critical excitation method. The upper bound of earthquake input energy per unit mass is considered the problem's constraint, and a modified power spectral density (PSD) function is proposed to conform to the new constraint. It is shown that the new constraint can be used as a criterion to estimate the possible range of input energy of similar earthquakes. In addition, the new PSD function can control the excitation's intensity. Finally, three base-isolated shear buildings modeled as multi degree of freedom systems with nonproportional damping are considered, and the critical excitations for each model are found based on the proposed method. To examine the reliability of the results, three actual accelerograms with a considerably high level of total input energy are selected as benchmarks and linear dynamic analyses are conducted using these accelerograms along with the generated critical excitations. The results show that the generated long-period excitations can better estimate the structural behavior (i.e., maximum displacement, drift, and absolute acceleration of stories) than the actual benchmark accelerograms. [ABSTRACT FROM AUTHOR] |
| Copyright of Mechanics Based Design of Structures & Machines is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 179023129 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A new probabilistic long-period critical excitation procedure for isolated building structures. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Bazrafshan%2C+Arsalan%22">Bazrafshan, Arsalan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Khaji%2C+Naser%22">Khaji, Naser</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> nkhaji@hiroshima-u.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Ahmadi%2C+Goodarz%22">Ahmadi, Goodarz</searchLink><relatesTo>3</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Mechanics+Based+Design+of+Structures+%26+Machines%22">Mechanics Based Design of Structures & Machines</searchLink>. 2024, Vol. 52 Issue 9, p7063-7091. 29p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Ground+motion%22">Ground motion</searchLink><br /><searchLink fieldCode="DE" term="%22Accelerograms%22">Accelerograms</searchLink><br /><searchLink fieldCode="DE" term="%22Earthquakes%22">Earthquakes</searchLink><br /><searchLink fieldCode="DE" term="%22Stochastic+processes%22">Stochastic processes</searchLink><br /><searchLink fieldCode="DE" term="%22Degrees+of+freedom%22">Degrees of freedom</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The present paper develops a new procedure for finding the most unfavorable long-period excitation for isolated building structures based on the probabilistic critical excitation method. The upper bound of earthquake input energy per unit mass is considered the problem's constraint, and a modified power spectral density (PSD) function is proposed to conform to the new constraint. It is shown that the new constraint can be used as a criterion to estimate the possible range of input energy of similar earthquakes. In addition, the new PSD function can control the excitation's intensity. Finally, three base-isolated shear buildings modeled as multi degree of freedom systems with nonproportional damping are considered, and the critical excitations for each model are found based on the proposed method. To examine the reliability of the results, three actual accelerograms with a considerably high level of total input energy are selected as benchmarks and linear dynamic analyses are conducted using these accelerograms along with the generated critical excitations. The results show that the generated long-period excitations can better estimate the structural behavior (i.e., maximum displacement, drift, and absolute acceleration of stories) than the actual benchmark accelerograms. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Mechanics Based Design of Structures & Machines is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/15397734.2023.2297242 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 29 StartPage: 7063 Subjects: – SubjectFull: Ground motion Type: general – SubjectFull: Accelerograms Type: general – SubjectFull: Earthquakes Type: general – SubjectFull: Stochastic processes Type: general – SubjectFull: Degrees of freedom Type: general Titles: – TitleFull: A new probabilistic long-period critical excitation procedure for isolated building structures. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Bazrafshan, Arsalan – PersonEntity: Name: NameFull: Khaji, Naser – PersonEntity: Name: NameFull: Ahmadi, Goodarz IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: 2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 15397734 Numbering: – Type: volume Value: 52 – Type: issue Value: 9 Titles: – TitleFull: Mechanics Based Design of Structures & Machines Type: main |
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