Effects of passive confinement on out-of-plane robustness of unreinforced masonry infill walls

Pradhan, Sujan; Sanada, Yasushi; Rokhyun, Yoon; Choi, Ho; Jin, Kiwoong

doi:https://doi.org/10.1016/j.istruc.2024.106676

Effects of passive confinement on out-of-plane robustness of unreinforced masonry infill walls

Pradhan, Sujan; Sanada, Yasushi; Rokhyun, Yoon et al.

Structures, 2024, 65, 106676

アクセス数:240件（2025-07-02 20:52 集計）

固定URL: https://hdl.handle.net/11094/97653

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タイトル	Effects of passive confinement on out-of-plane robustness of unreinforced masonry infill walls
著者	NRID 1000080967141 1000080967141 著者名 Pradhan, Sujan
	NRID 1000080334358 1000080334358 ORCID 0000-0002-0271-6729 0000-0002-0271-6729 researchmap permalink sanadaou sanadaou Scopus Author ID 36246467400 36246467400 著者名 Sanada, Yasushi
	NRID 1000050844205 1000050844205 researchmap permalink yoon0909 yoon0909 Scopus Author ID 56498713500 56498713500 著者名 Rokhyun, Yoon
	NRID 1000040512009 1000040512009 著者名 Choi, Ho
	NRID 1000060727006 1000060727006 著者名 Jin, Kiwoong
キーワード等	Incremental dynamic test
	Infill wall
	Lateral resistance
	Moment-resistance frame
	Safety assessment
	Seismic performance
	Static tilting test
内容	Pradhan S., Sanada Y., Rokhyun Y., et al. Effects of passive confinement on out-of-plane robustness of unreinforced masonry infill walls. Structures 65, 106676 (2024); https://doi.org/10.1016/j.istruc.2024.106676.
抄録	Unreinforced masonry (URM) walls are vulnerable to out-of-plane (OOP) collapse under lateral loads; however, URM structures are still popular in developing countries. Even in many countries classified as developed by the United Nations, URM walls are still commonly applied as exterior and interior infills in engineered buildings, resulting in severe OOP failure during strong earthquakes. The objectives of this study were: 1) to experimentally examine the OOP behavior and performance of URM infills with construction deficiencies commonly found in Asian countries, 2) to investigate the impact of construction quality on resistance to OOP collapse and 3) to propose a promising approach using passive confinement to improve the lateral resistance of URM infills and a method to evaluate their seismic performance. To attain these objectives, the study used two full-scale, single wythe, brick masonry specimens with specific boundary conditions at the top, a control specimen representing URM infills with construction flaws frequently found in Asian countries and a well-constructed specimen subjected to passive confinement under lateral excitation. A series of incremental dynamic shaking table tests was performed on both specimens under OOP unidirectional one-way bending. The test results revealed the positive effects of construction with passive confinement on OOP performance. The results indicated that the OOP robustness of infills can be improved without specific retrofit materials, leading to advantages such as simplicity, cost-effectiveness, and swift execution. Moreover, a theoretical method to evaluate the lateral resistance of infills was presented and verified for practical applications. This method can contribute to reducing the potential for earthquake damage in engineered buildings.
出版者	Elsevier Ltd
収録物名	Structures
巻(号)	65
ページ	106676
刊行年月	2024-07-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/97653
eISSN	23520124
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.istruc.2024.106676
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCTERMS.bibliographicCitation	Structures. 2024, 65, p. 106676
DC.title	Effects of passive confinement on out-of-plane robustness of unreinforced masonry infill walls
DC.creator	Pradhan, Sujan
	Sanada, Yasushi
	Rokhyun, Yoon
	Choi, Ho
	Jin, Kiwoong
DC.publisher	Elsevier Ltd
DC.language' scheme='DCTERMS.RFC1766	英語
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-07-01
DC.identifier	https://doi.org/10.1016/j.istruc.2024.106676
DC.subject	Incremental dynamic test
	Infill wall
	Lateral resistance
	Moment-resistance frame
	Safety assessment
	Seismic performance
	Static tilting test
DC.description	Pradhan S., Sanada Y., Rokhyun Y., et al. Effects of passive confinement on out-of-plane robustness of unreinforced masonry infill walls. Structures 65, 106676 (2024); https://doi.org/10.1016/j.istruc.2024.106676.
DCTERMS.abstract	Unreinforced masonry (URM) walls are vulnerable to out-of-plane (OOP) collapse under lateral loads; however, URM structures are still popular in developing countries. Even in many countries classified as developed by the United Nations, URM walls are still commonly applied as exterior and interior infills in engineered buildings, resulting in severe OOP failure during strong earthquakes. The objectives of this study were: 1) to experimentally examine the OOP behavior and performance of URM infills with construction deficiencies commonly found in Asian countries, 2) to investigate the impact of construction quality on resistance to OOP collapse and 3) to propose a promising approach using passive confinement to improve the lateral resistance of URM infills and a method to evaluate their seismic performance. To attain these objectives, the study used two full-scale, single wythe, brick masonry specimens with specific boundary conditions at the top, a control specimen representing URM infills with construction flaws frequently found in Asian countries and a well-constructed specimen subjected to passive confinement under lateral excitation. A series of incremental dynamic shaking table tests was performed on both specimens under OOP unidirectional one-way bending. The test results revealed the positive effects of construction with passive confinement on OOP performance. The results indicated that the OOP robustness of infills can be improved without specific retrofit materials, leading to advantages such as simplicity, cost-effectiveness, and swift execution. Moreover, a theoretical method to evaluate the lateral resistance of infills was presented and verified for practical applications. This method can contribute to reducing the potential for earthquake damage in engineered buildings.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
DC.format	97653
citation_title	Effects of passive confinement on out-of-plane robustness of unreinforced masonry infill walls
citation_author	Pradhan, Sujan
	Sanada, Yasushi
	Rokhyun, Yoon
	Choi, Ho
	Jin, Kiwoong
citation_publisher	Elsevier Ltd
citation_language	英語
citation_date	2024-07-01
citation_journal_title	Structures
citation_volume	65
citation_firstpage	106676
citation_doi	https://doi.org/10.1016/j.istruc.2024.106676
citation_public_url	https://hdl.handle.net/11094/97653

Effects of passive confinement on out-of-plane robustness of unreinforced masonry infill walls

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