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Performance of partially grouted reinforced masonry walls with bed-joint reinforcement: parametric and optimization investigation

Post-seismic assessments have indicated that the responses of masonry walls to seismic forces may be classified into two key categories: in-plane global mechanisms and out-of-plane cyclical actions occurring orthogonally to the wall. The initial phase of this investigation scrutinized the widely acc...

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Main Authors: Faridmehr, Iman, Nehdi, Moncef L., Nejad, Ali Farokhi, Valerievich, Kiyanets Aleksandr
Format: Article
Published: Springer Nature 2023
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/105268/
http://dx.doi.org/10.1007/s43452-023-00810-8
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spelling my.utm.1052682024-04-24T05:59:30Z http://eprints.utm.my/105268/ Performance of partially grouted reinforced masonry walls with bed-joint reinforcement: parametric and optimization investigation Faridmehr, Iman Nehdi, Moncef L. Nejad, Ali Farokhi Valerievich, Kiyanets Aleksandr TJ Mechanical engineering and machinery Post-seismic assessments have indicated that the responses of masonry walls to seismic forces may be classified into two key categories: in-plane global mechanisms and out-of-plane cyclical actions occurring orthogonally to the wall. The initial phase of this investigation scrutinized the widely accepted shear strength models for in-plane shear resistance, Vn, of reinforced masonry (RM) walls. Subsequently, using a dataset comprising 78 samples of fully grouted hollow concrete block (HCB) RM walls, a detailed examination of the sensitivity of experimental shear strength, , to geometric, mechanical, and reinforcement characteristics of the wall was undertaken. The study's second phase entailed a parametric evaluation using finite element analysis to appraise the sensitivity of lateral drift to wall geometry and bed-joint reinforcement attributes. The third phase of the research introduced an informational model for estimating the lateral drift of partially grouted RM walls, incorporating BJ and vertical reinforcement. The model was established utilizing data from 44 full-scale in-plane cyclic tests on clay brick walls and 32 tests on HCB walls. The investigation further presented a multi-objective optimization methodology to ascertain the optimal vertical and BJR ratios, ?v and ?BJ. A graphical user interface and an accompanying empirical equation were also devised to simplify the analysis and design process for reinforced masonry walls, obviating the need for lengthy analyses. Increasing the BJR size from 6 to 8 mm resulted in a 30% increase in for specimens with six BJR rows, while increasing the number of BJR rows from six to ten led to 16% rise in , as demonstrated by numerical modeling validated against experimental tests.The findings of the study highlight a notable dependence of the lateral drift capacity of reinforced masonry walls on wall geometry and ?BJ ratio. These revelations provide invaluable insights for designing earthquake-resistant masonry edifices and formulating rehabilitation strategies for existing masonry structures deficient in seismic resilience. Springer Nature 2023 Article PeerReviewed Faridmehr, Iman and Nehdi, Moncef L. and Nejad, Ali Farokhi and Valerievich, Kiyanets Aleksandr (2023) Performance of partially grouted reinforced masonry walls with bed-joint reinforcement: parametric and optimization investigation. Archives of Civil and Mechanical Engineering, 24 (2). NA-NA. ISSN 1644-9665 http://dx.doi.org/10.1007/s43452-023-00810-8 DOI : 10.1007/s43452-023-00810-8
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Faridmehr, Iman
Nehdi, Moncef L.
Nejad, Ali Farokhi
Valerievich, Kiyanets Aleksandr
Performance of partially grouted reinforced masonry walls with bed-joint reinforcement: parametric and optimization investigation
description Post-seismic assessments have indicated that the responses of masonry walls to seismic forces may be classified into two key categories: in-plane global mechanisms and out-of-plane cyclical actions occurring orthogonally to the wall. The initial phase of this investigation scrutinized the widely accepted shear strength models for in-plane shear resistance, Vn, of reinforced masonry (RM) walls. Subsequently, using a dataset comprising 78 samples of fully grouted hollow concrete block (HCB) RM walls, a detailed examination of the sensitivity of experimental shear strength, , to geometric, mechanical, and reinforcement characteristics of the wall was undertaken. The study's second phase entailed a parametric evaluation using finite element analysis to appraise the sensitivity of lateral drift to wall geometry and bed-joint reinforcement attributes. The third phase of the research introduced an informational model for estimating the lateral drift of partially grouted RM walls, incorporating BJ and vertical reinforcement. The model was established utilizing data from 44 full-scale in-plane cyclic tests on clay brick walls and 32 tests on HCB walls. The investigation further presented a multi-objective optimization methodology to ascertain the optimal vertical and BJR ratios, ?v and ?BJ. A graphical user interface and an accompanying empirical equation were also devised to simplify the analysis and design process for reinforced masonry walls, obviating the need for lengthy analyses. Increasing the BJR size from 6 to 8 mm resulted in a 30% increase in for specimens with six BJR rows, while increasing the number of BJR rows from six to ten led to 16% rise in , as demonstrated by numerical modeling validated against experimental tests.The findings of the study highlight a notable dependence of the lateral drift capacity of reinforced masonry walls on wall geometry and ?BJ ratio. These revelations provide invaluable insights for designing earthquake-resistant masonry edifices and formulating rehabilitation strategies for existing masonry structures deficient in seismic resilience.
format Article
author Faridmehr, Iman
Nehdi, Moncef L.
Nejad, Ali Farokhi
Valerievich, Kiyanets Aleksandr
author_facet Faridmehr, Iman
Nehdi, Moncef L.
Nejad, Ali Farokhi
Valerievich, Kiyanets Aleksandr
author_sort Faridmehr, Iman
title Performance of partially grouted reinforced masonry walls with bed-joint reinforcement: parametric and optimization investigation
title_short Performance of partially grouted reinforced masonry walls with bed-joint reinforcement: parametric and optimization investigation
title_full Performance of partially grouted reinforced masonry walls with bed-joint reinforcement: parametric and optimization investigation
title_fullStr Performance of partially grouted reinforced masonry walls with bed-joint reinforcement: parametric and optimization investigation
title_full_unstemmed Performance of partially grouted reinforced masonry walls with bed-joint reinforcement: parametric and optimization investigation
title_sort performance of partially grouted reinforced masonry walls with bed-joint reinforcement: parametric and optimization investigation
publisher Springer Nature
publishDate 2023
url http://eprints.utm.my/105268/
http://dx.doi.org/10.1007/s43452-023-00810-8
_version_ 1797905985159823360
score 13.211869

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