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Strength Evaluation of Early-Age Masonry Walls Subjected to Lateral Loads
https://orcid.org/http://orcid.org/0000-0003-4839-315X
Several international standards, such as ACI-530 and CSA-S304, were prepared to design fully cured masonry structures subjected to lateral loads safely. However, early-age masonry structures (i.e., within seven days after construction) are vulnerable to wind-induced lateral loads, and they do not attain the same strength and properties as fully cured masonry. According to the design codes, early-age masonry walls should be supported laterally using temporary bracing until they are integrated into other structural elements or the masonry assembly cures. On the other hand, since quality assurance testing does not begin until seven days after construction, there is no data providing information about the properties of early-age masonry. Therefore, designers are left to rely on engineering judgment to extrapolate the properties of early-age masonry to design temporary support systems for these walls. This gap inevitably results in inaccurately designed temporary bracing systems, which has resulted in the failure of several fresh masonry walls and can lead to injury or even death on jobsites. In this paper, a new test setup has been designed to monitor the behavior of full-scale early-age masonry walls subjected to uniformly distributed lateral loads, simulating wind loads. Several early-age masonry walls corresponding to different curing periods, including 5, 16, 72, 168 (7 days), and 672 h (28 days), have been tested and monitored, and the flexural tensile strength of the masonry walls has been investigated. The results show that the strength of early-age masonry walls during the early hours after construction is less than 5% of their full strength, and the curing time plays a vital role in the strength of the early-age masonry walls. Moreover, early-age masonry walls obtain almost 40 and 73% of their full strength during just the first 24 and 72 h of curing time, respectively. The tensile strength of the mortar governs the failure of the early-age masonry walls, and an abrupt failure happens during the tests.
Strength Evaluation of Early-Age Masonry Walls Subjected to Lateral Loads
https://orcid.org/http://orcid.org/0000-0003-4839-315X
Several international standards, such as ACI-530 and CSA-S304, were prepared to design fully cured masonry structures subjected to lateral loads safely. However, early-age masonry structures (i.e., within seven days after construction) are vulnerable to wind-induced lateral loads, and they do not attain the same strength and properties as fully cured masonry. According to the design codes, early-age masonry walls should be supported laterally using temporary bracing until they are integrated into other structural elements or the masonry assembly cures. On the other hand, since quality assurance testing does not begin until seven days after construction, there is no data providing information about the properties of early-age masonry. Therefore, designers are left to rely on engineering judgment to extrapolate the properties of early-age masonry to design temporary support systems for these walls. This gap inevitably results in inaccurately designed temporary bracing systems, which has resulted in the failure of several fresh masonry walls and can lead to injury or even death on jobsites. In this paper, a new test setup has been designed to monitor the behavior of full-scale early-age masonry walls subjected to uniformly distributed lateral loads, simulating wind loads. Several early-age masonry walls corresponding to different curing periods, including 5, 16, 72, 168 (7 days), and 672 h (28 days), have been tested and monitored, and the flexural tensile strength of the masonry walls has been investigated. The results show that the strength of early-age masonry walls during the early hours after construction is less than 5% of their full strength, and the curing time plays a vital role in the strength of the early-age masonry walls. Moreover, early-age masonry walls obtain almost 40 and 73% of their full strength during just the first 24 and 72 h of curing time, respectively. The tensile strength of the mortar governs the failure of the early-age masonry walls, and an abrupt failure happens during the tests.
Strength Evaluation of Early-Age Masonry Walls Subjected to Lateral Loads
https://orcid.org/http://orcid.org/0000-0003-4839-315X
Several international standards, such as ACI-530 and CSA-S304, were prepared to design fully cured masonry structures subjected to lateral loads safely. However, early-age masonry structures (i.e., within seven days after construction) are vulnerable to wind-induced lateral loads, and they do not attain the same strength and properties as fully cured masonry. According to the design codes, early-age masonry walls should be supported laterally using temporary bracing until they are integrated into other structural elements or the masonry assembly cures. On the other hand, since quality assurance testing does not begin until seven days after construction, there is no data providing information about the properties of early-age masonry. Therefore, designers are left to rely on engineering judgment to extrapolate the properties of early-age masonry to design temporary support systems for these walls. This gap inevitably results in inaccurately designed temporary bracing systems, which has resulted in the failure of several fresh masonry walls and can lead to injury or even death on jobsites. In this paper, a new test setup has been designed to monitor the behavior of full-scale early-age masonry walls subjected to uniformly distributed lateral loads, simulating wind loads. Several early-age masonry walls corresponding to different curing periods, including 5, 16, 72, 168 (7 days), and 672 h (28 days), have been tested and monitored, and the flexural tensile strength of the masonry walls has been investigated. The results show that the strength of early-age masonry walls during the early hours after construction is less than 5% of their full strength, and the curing time plays a vital role in the strength of the early-age masonry walls. Moreover, early-age masonry walls obtain almost 40 and 73% of their full strength during just the first 24 and 72 h of curing time, respectively. The tensile strength of the mortar governs the failure of the early-age masonry walls, and an abrupt failure happens during the tests.
Strength Evaluation of Early-Age Masonry Walls Subjected to Lateral Loads
Lecture Notes in Civil Engineering
Desjardins, Serge (editor) / Poitras, Gérard J. (editor) / El Damatty, Ashraf (editor) / Elshaer, Ahmed (editor) / Abasi, Ali (author) / Sadhu, Ayan (author) / Banting, Bennett (author)
Canadian Society of Civil Engineering Annual Conference ; 2023 ; Moncton, NB, Canada
2024-09-03
13 pages
Article/Chapter (Book)
Electronic Resource
English
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