Effects of size and position of openings on in-plane capacity of unreinforced masonry walls.
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| Title: | Effects of size and position of openings on in-plane capacity of unreinforced masonry walls. |
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| Authors: | Liu, Zhen1 (AUTHOR), Crewe, Adam1 (AUTHOR) A.J.Crewe@bristol.ac.uk |
| Source: | Bulletin of Earthquake Engineering. Aug2020, Vol. 18 Issue 10, p4783-4812. 30p. |
| Subject Terms: | *Walls, *Masonry, *Discrete element method, *Numerical analysis |
| Abstract: | In recent earthquakes, unreinforced masonry (URM) structures built of masonry walls containing openings such as doors and windows have been shown to have poor seismic capacity. However, although different sizes and positions of openings are known to reduce the stiffness and strength of URM walls, the relationships between the size and position of openings and seismic capacity of the walls are not clear. Therefore, a series of numerical analyses has, for the first time, explored many possible opening sizes and opening positions under simulated seismic loading to identify their impact on the in-plane behaviour of URM walls. The numerical models were built using the code "3DEC" which is based on the discrete element method (DEM). The key feature of the DEM is that it allows the development of large displacements between elements with contacts being recognized automatically during the analysis. Thus, this numerical method can capture the whole degradation progress from the initial cracking of the masonry walls right through to collapse, with the bricks being modelled as rigid blocks and the mortar as Coulomb-slip joints with zero thickness. Both load-based and displacement-based quasi-static pushover analysis procedures have been studied and the modelling methodology and the calibration of numerical models is described. The results from the analyses, the crack patterns and collapse mechanisms of the masonry walls are identified and discussed, and a key output from this work is the characterization of the relationships between the sizes and positions of openings and the in-plane performance of URM walls. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 144640147 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Effects of size and position of openings on in-plane capacity of unreinforced masonry walls. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Liu%2C+Zhen%22">Liu, Zhen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Crewe%2C+Adam%22">Crewe, Adam</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> A.J.Crewe@bristol.ac.uk</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Bulletin+of+Earthquake+Engineering%22">Bulletin of Earthquake Engineering</searchLink>. Aug2020, Vol. 18 Issue 10, p4783-4812. 30p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Walls%22">Walls</searchLink><br />*<searchLink fieldCode="DE" term="%22Masonry%22">Masonry</searchLink><br />*<searchLink fieldCode="DE" term="%22Discrete+element+method%22">Discrete element method</searchLink><br />*<searchLink fieldCode="DE" term="%22Numerical+analysis%22">Numerical analysis</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In recent earthquakes, unreinforced masonry (URM) structures built of masonry walls containing openings such as doors and windows have been shown to have poor seismic capacity. However, although different sizes and positions of openings are known to reduce the stiffness and strength of URM walls, the relationships between the size and position of openings and seismic capacity of the walls are not clear. Therefore, a series of numerical analyses has, for the first time, explored many possible opening sizes and opening positions under simulated seismic loading to identify their impact on the in-plane behaviour of URM walls. The numerical models were built using the code "3DEC" which is based on the discrete element method (DEM). The key feature of the DEM is that it allows the development of large displacements between elements with contacts being recognized automatically during the analysis. Thus, this numerical method can capture the whole degradation progress from the initial cracking of the masonry walls right through to collapse, with the bricks being modelled as rigid blocks and the mortar as Coulomb-slip joints with zero thickness. Both load-based and displacement-based quasi-static pushover analysis procedures have been studied and the modelling methodology and the calibration of numerical models is described. The results from the analyses, the crack patterns and collapse mechanisms of the masonry walls are identified and discussed, and a key output from this work is the characterization of the relationships between the sizes and positions of openings and the in-plane performance of URM walls. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=144640147 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s10518-020-00894-0 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 30 StartPage: 4783 Subjects: – SubjectFull: Walls Type: general – SubjectFull: Masonry Type: general – SubjectFull: Discrete element method Type: general – SubjectFull: Numerical analysis Type: general Titles: – TitleFull: Effects of size and position of openings on in-plane capacity of unreinforced masonry walls. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Liu, Zhen – PersonEntity: Name: NameFull: Crewe, Adam IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2020 Type: published Y: 2020 Identifiers: – Type: issn-print Value: 1570761X Numbering: – Type: volume Value: 18 – Type: issue Value: 10 Titles: – TitleFull: Bulletin of Earthquake Engineering Type: main |
| ResultId | 1 |
