Failure analysis and structural reliability of unreinforced masonry veneer walls: Influence of wall tie corrosion

Muhit, IB; Masia, MJ; Stewart, MG

Failure analysis and structural reliability of unreinforced masonry veneer walls: Influence of wall tie corrosion

Muhit, IB Masia, MJ Stewart, MG

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Engineering Failure Analysis, 2023, 151
Issue Date:: 2023-09-01

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Field	Value	Language
dc.contributor.author	Muhit, IB
dc.contributor.author	Masia, MJ
dc.contributor.author	Stewart, MG
dc.date.accessioned	2024-04-22T21:53:01Z
dc.date.available	2024-04-22T21:53:01Z
dc.date.issued	2023-09-01
dc.identifier.citation	Engineering Failure Analysis, 2023, 151
dc.identifier.issn	1350-6307
dc.identifier.issn	1873-1961
dc.identifier.uri	http://hdl.handle.net/10453/178214
dc.description.abstract	Corrosion appears to be a very common problem in historical and aged structures with steel ties and anchorages. A potential rapid deterioration of the wall tie due to the corrosion leading to a premature structural failure poses a serious threat to the built heritage infrastructures’ safety. This paper describes an overview of the probabilistic failure analysis of the unreinforced masonry (URM) veneer wall system with flexible backup under uniformly distributed out-of-plane loadings. Moreover, a framework is proposed to consider the wall tie corrosion in the stochastic finite element analysis (FEA) while estimating the structural reliability. A probabilistic experimental study where 18 full-scale URM veneer wall systems with theoretically identical geometries and properties were tested under inward and outward lateral loading. Wall failure statistics along with the probabilistic characterisation of veneer wall constituent materials including mortar, wall tie and timber were accomplished. A stochastic computational model was then developed which combines the FEA and Monte Carlo simulation to evaluate the failure progression and system peak load (veneer capacity) while considering the spatial variability of veneer wall material properties. Two scenarios, with and without wall tie corrosion, are considered, and the probabilistic characterisation of the veneer capacities for these scenarios under inward and outward out-of-plane loading is also reported. The model error statistics were combined with the probabilistic load models to determine the reliability index corresponding to the Australian Standard for Masonry Structures AS 3700. Annual reliabilities are compared to target reliabilities recommended by ISO 2394. Capacity reduction factor and design minimum tie strength consideration for corroded wall tie is also discussed.
dc.language	English
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation	http://purl.org/au-research/grants/arc/DP180102334
dc.relation.ispartof	Engineering Failure Analysis
dc.relation.isbasedon	10.1016/j.engfailanal.2023.107354
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0905 Civil Engineering, 0912 Materials Engineering, 0913 Mechanical Engineering
dc.subject.classification	Mechanical Engineering & Transports
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4016 Materials engineering
dc.subject.classification	4017 Mechanical engineering
dc.title	Failure analysis and structural reliability of unreinforced masonry veneer walls: Influence of wall tie corrosion
dc.type	Journal Article
utslib.citation.volume	151
utslib.for	0905 Civil Engineering
utslib.for	0912 Materials Engineering
utslib.for	0913 Mechanical 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	*
dc.date.updated	2024-04-22T21:52:51Z
pubs.publication-status	Published
pubs.volume	151

Abstract:

Corrosion appears to be a very common problem in historical and aged structures with steel ties and anchorages. A potential rapid deterioration of the wall tie due to the corrosion leading to a premature structural failure poses a serious threat to the built heritage infrastructures’ safety. This paper describes an overview of the probabilistic failure analysis of the unreinforced masonry (URM) veneer wall system with flexible backup under uniformly distributed out-of-plane loadings. Moreover, a framework is proposed to consider the wall tie corrosion in the stochastic finite element analysis (FEA) while estimating the structural reliability. A probabilistic experimental study where 18 full-scale URM veneer wall systems with theoretically identical geometries and properties were tested under inward and outward lateral loading. Wall failure statistics along with the probabilistic characterisation of veneer wall constituent materials including mortar, wall tie and timber were accomplished. A stochastic computational model was then developed which combines the FEA and Monte Carlo simulation to evaluate the failure progression and system peak load (veneer capacity) while considering the spatial variability of veneer wall material properties. Two scenarios, with and without wall tie corrosion, are considered, and the probabilistic characterisation of the veneer capacities for these scenarios under inward and outward out-of-plane loading is also reported. The model error statistics were combined with the probabilistic load models to determine the reliability index corresponding to the Australian Standard for Masonry Structures AS 3700. Annual reliabilities are compared to target reliabilities recommended by ISO 2394. Capacity reduction factor and design minimum tie strength consideration for corroded wall tie is also discussed.

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http://hdl.handle.net/10453/178214