Simplified mechanical models for the seismic collapse performance prediction of unreinforced masonry structures.
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| Title: | Simplified mechanical models for the seismic collapse performance prediction of unreinforced masonry structures. |
|---|---|
| Authors: | Yu, Li-Ling1 (AUTHOR), Dong, Zhi-Qian2 (AUTHOR) zqdong@dlut.edu.cn, Li, Gang1,3 (AUTHOR) gli@dlut.edu.cn |
| Source: | Engineering Structures. May2022, Vol. 258, pN.PAG-N.PAG. 1p. |
| Subjects: | Reinforced masonry, Earthquake hazard analysis, Mechanical models, Masonry, Masonry testing, Finite element method, Structural models |
| Abstract: | • An experimental database including lots of unreinforced masonry wall test data is assembled. • A parameter calibration method that distinguishes in-cycle and cyclic deterioration behaviors is built. • The simplified model achieves reasonable estimation of failure behaviors under different loading patterns. Unreinforced masonry, including non-confined unreinforced masonry (NCURM) and confined unreinforced masonry (CURM), constitutes a significant portion of low-rise buildings and is prone to collapse due to high seismic vulnerability. Seismic collapse performance prediction is an effective method to reduce structural collapse, and it requires the analytical model that can correctly simulate structural mechanical behaviors, especially for the deterioration behaviors from accumulation damage. Macro-scale structural models constructed based on hysteretic models of walls have small computational efforts compared to micro-scale finite element models, and are preferred for structural seismic collapse performance analysis. However, existing hysteretic models of NCURM wall and CURM wall lack accuracy in considering the deterioration behaviors due to incorrect model forms or lack of available model parameter values. In this study, an experimental database consisting of cyclic tests on 47 NCURM walls and 50 CURM walls is assembled based on the existing literature. The hysteretic models of NCURM wall and CURM wall are developed by the combined use of the assembled database and the Ibarra-Krawinkler (IK) model from Ibarra et al. The IK model has versatile consideration of the in-cycle and cyclic deterioration behaviors and is used for the modeling of walls. A calibration procedure that clearly distinguishes the in-cycle and cyclic deterioration behaviors is established, and the model parameters of test walls in the database are calibrated. By regression analyses of calibration results, a set of empirical equations are created for determining model parameters. To satisfy the seismic collapse performance analysis of regional masonry buildings, the multi-degree-of-freedom (MDOF) shear model of masonry structure is further given based on the wall hysteretic model, which is constructed by the structural inter-story mechanical behaviors and has very small computational efforts. Good accuracy of both wall hysteretic model and structural MDOF shear model is verified by the comparisons with experimental and numerical results. [ABSTRACT FROM AUTHOR] |
| Copyright of Engineering Structures is the property of Elsevier B.V. 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.) | |
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| Items | – Name: Title Label: Title Group: Ti Data: Simplified mechanical models for the seismic collapse performance prediction of unreinforced masonry structures. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Yu%2C+Li-Ling%22">Yu, Li-Ling</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dong%2C+Zhi-Qian%22">Dong, Zhi-Qian</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> zqdong@dlut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Gang%22">Li, Gang</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> gli@dlut.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Engineering+Structures%22">Engineering Structures</searchLink>. May2022, Vol. 258, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Reinforced+masonry%22">Reinforced masonry</searchLink><br /><searchLink fieldCode="DE" term="%22Earthquake+hazard+analysis%22">Earthquake hazard analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+models%22">Mechanical models</searchLink><br /><searchLink fieldCode="DE" term="%22Masonry%22">Masonry</searchLink><br /><searchLink fieldCode="DE" term="%22Masonry+testing%22">Masonry testing</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+models%22">Structural models</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: • An experimental database including lots of unreinforced masonry wall test data is assembled. • A parameter calibration method that distinguishes in-cycle and cyclic deterioration behaviors is built. • The simplified model achieves reasonable estimation of failure behaviors under different loading patterns. Unreinforced masonry, including non-confined unreinforced masonry (NCURM) and confined unreinforced masonry (CURM), constitutes a significant portion of low-rise buildings and is prone to collapse due to high seismic vulnerability. Seismic collapse performance prediction is an effective method to reduce structural collapse, and it requires the analytical model that can correctly simulate structural mechanical behaviors, especially for the deterioration behaviors from accumulation damage. Macro-scale structural models constructed based on hysteretic models of walls have small computational efforts compared to micro-scale finite element models, and are preferred for structural seismic collapse performance analysis. However, existing hysteretic models of NCURM wall and CURM wall lack accuracy in considering the deterioration behaviors due to incorrect model forms or lack of available model parameter values. In this study, an experimental database consisting of cyclic tests on 47 NCURM walls and 50 CURM walls is assembled based on the existing literature. The hysteretic models of NCURM wall and CURM wall are developed by the combined use of the assembled database and the Ibarra-Krawinkler (IK) model from Ibarra et al. The IK model has versatile consideration of the in-cycle and cyclic deterioration behaviors and is used for the modeling of walls. A calibration procedure that clearly distinguishes the in-cycle and cyclic deterioration behaviors is established, and the model parameters of test walls in the database are calibrated. By regression analyses of calibration results, a set of empirical equations are created for determining model parameters. To satisfy the seismic collapse performance analysis of regional masonry buildings, the multi-degree-of-freedom (MDOF) shear model of masonry structure is further given based on the wall hysteretic model, which is constructed by the structural inter-story mechanical behaviors and has very small computational efforts. Good accuracy of both wall hysteretic model and structural MDOF shear model is verified by the comparisons with experimental and numerical results. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Engineering Structures is the property of Elsevier B.V. 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: 10.1016/j.engstruct.2022.114131 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Reinforced masonry Type: general – SubjectFull: Earthquake hazard analysis Type: general – SubjectFull: Mechanical models Type: general – SubjectFull: Masonry Type: general – SubjectFull: Masonry testing Type: general – SubjectFull: Finite element method Type: general – SubjectFull: Structural models Type: general Titles: – TitleFull: Simplified mechanical models for the seismic collapse performance prediction of unreinforced masonry structures. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Yu, Li-Ling – PersonEntity: Name: NameFull: Dong, Zhi-Qian – PersonEntity: Name: NameFull: Li, Gang IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2022 Type: published Y: 2022 Identifiers: – Type: issn-print Value: 01410296 Numbering: – Type: volume Value: 258 Titles: – TitleFull: Engineering Structures Type: main |
| ResultId | 1 |
