Seismic evaluation of bridge bearings based on damage index.
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| Title: | Seismic evaluation of bridge bearings based on damage index. |
|---|---|
| Authors: | Mahboubi, S.1 (AUTHOR), Shiravand, M. R.1 (AUTHOR) m_shiravand@sbu.ac.ir |
| Source: | Bulletin of Earthquake Engineering. Jul2019, Vol. 17 Issue 7, p4269-4297. 29p. |
| Subject Terms: | *Bridge bearings, *Lateral loads, *Compression loads, *Axial loads, *Damage models |
| Abstract: | Bearings acts as fusing components in bridges and transfer loads from superstructures to substructures. During earthquakes, bridge bearings may be subjected to large axial compressive loads and lateral displacements, and consequently experience severe damages. In this paper, an input energy-based (IEB) and a sliding displacement-based (SDB) damage index are proposed for quantifying seismic damage of the bridge bearings. The IEB damage index, previously proposed by authors, as the ratio of the dissipated energy to the earthquake input energy, and the SDB damage index is defined considering yielding displacement of the bearings corresponding to their sliding threshold. To evaluate the ability of the proposed damage indices in damage assessment of the bridge bearings, the force–displacement behavior of three commonly used bearings including elastomeric bearing, lead–rubber bearing, and flat sliding bearing are developed using rheological models. A set of the bearing specimens experimentally tested under cyclic/seismic loadings is adopted to calibrate the reliability of the damage indices. The results show that the IEB damage index provides a reasonably gradual progression of damage throughout the loading history and gives acceptable values for sliding and failure damage levels of the bearings more convincingly than the SDB damage model with respect to the experiment observations. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 137026285 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Seismic evaluation of bridge bearings based on damage index. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Mahboubi%2C+S%2E%22">Mahboubi, S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shiravand%2C+M%2E+R%2E%22">Shiravand, M. R.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> m_shiravand@sbu.ac.ir</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Bulletin+of+Earthquake+Engineering%22">Bulletin of Earthquake Engineering</searchLink>. Jul2019, Vol. 17 Issue 7, p4269-4297. 29p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Bridge+bearings%22">Bridge bearings</searchLink><br />*<searchLink fieldCode="DE" term="%22Lateral+loads%22">Lateral loads</searchLink><br />*<searchLink fieldCode="DE" term="%22Compression+loads%22">Compression loads</searchLink><br />*<searchLink fieldCode="DE" term="%22Axial+loads%22">Axial loads</searchLink><br />*<searchLink fieldCode="DE" term="%22Damage+models%22">Damage models</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Bearings acts as fusing components in bridges and transfer loads from superstructures to substructures. During earthquakes, bridge bearings may be subjected to large axial compressive loads and lateral displacements, and consequently experience severe damages. In this paper, an input energy-based (IEB) and a sliding displacement-based (SDB) damage index are proposed for quantifying seismic damage of the bridge bearings. The IEB damage index, previously proposed by authors, as the ratio of the dissipated energy to the earthquake input energy, and the SDB damage index is defined considering yielding displacement of the bearings corresponding to their sliding threshold. To evaluate the ability of the proposed damage indices in damage assessment of the bridge bearings, the force–displacement behavior of three commonly used bearings including elastomeric bearing, lead–rubber bearing, and flat sliding bearing are developed using rheological models. A set of the bearing specimens experimentally tested under cyclic/seismic loadings is adopted to calibrate the reliability of the damage indices. The results show that the IEB damage index provides a reasonably gradual progression of damage throughout the loading history and gives acceptable values for sliding and failure damage levels of the bearings more convincingly than the SDB damage model with respect to the experiment observations. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=137026285 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s10518-019-00614-3 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 29 StartPage: 4269 Subjects: – SubjectFull: Bridge bearings Type: general – SubjectFull: Lateral loads Type: general – SubjectFull: Compression loads Type: general – SubjectFull: Axial loads Type: general – SubjectFull: Damage models Type: general Titles: – TitleFull: Seismic evaluation of bridge bearings based on damage index. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Mahboubi, S. – PersonEntity: Name: NameFull: Shiravand, M. R. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 1570761X Numbering: – Type: volume Value: 17 – Type: issue Value: 7 Titles: – TitleFull: Bulletin of Earthquake Engineering Type: main |
| ResultId | 1 |
