Performance of Repaired Concrete under Cyclic Flexural Loading
There is limited research reported on the effect of cyclic loading on cement-based repair materials as conducting such tests is time consuming. To overcome this issue, this study utilized a novel loading regime consisting of cycle groups with increasing stress amplitude to accelerate the test proces...
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doaj-bf0480c18a8c479aa2dbaceb8337497d2021-03-12T00:04:45ZengMDPI AGMaterials1996-19442021-03-01141363136310.3390/ma14061363Performance of Repaired Concrete under Cyclic Flexural LoadingBoyu Wang0Rishi Gupta1Department of Civil Engineering, University of Victoria, 3800 Finnerty Road, Victoria, BC V8W 2Y2, CanadaDepartment of Civil Engineering, University of Victoria, 3800 Finnerty Road, Victoria, BC V8W 2Y2, CanadaThere is limited research reported on the effect of cyclic loading on cement-based repair materials as conducting such tests is time consuming. To overcome this issue, this study utilized a novel loading regime consisting of cycle groups with increasing stress amplitude to accelerate the test process. The Palmgren-Minder rule was used to estimate the fatigue life of repaired specimens. Specimens repaired with Mix M (cementitious repair mortar), which was estimated to have the highest 2-million-cycle fatigue endurance limit (77.4%), showed the longest fatigue life (95,991 cycles) during the cyclic loading test, the highest slant, and splitting bond strength among all repair mixes. The estimated two-million cycle fatigue endurance limit of Mix S (70.8%) was very similar to that was reported in literature (71%) using the traditional loading method. This study confirms the usefulness of Palmgren-Minder rule on estimating the fatigue life of repaired specimens. Additionally, the use of the novel loading regime showed the benefit of shortening the test process while producing results similar to those from using traditional loading methods. To improve the prediction accuracy, future research is required to modify the failure criteria to accommodate specimens that may not fail even when the average flexural strength is met.https://www.mdpi.com/1996-1944/14/6/1363cyclic loadingrepair materialsbondhysteric behavior |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Boyu Wang Rishi Gupta |
spellingShingle |
Boyu Wang Rishi Gupta Performance of Repaired Concrete under Cyclic Flexural Loading Materials cyclic loading repair materials bond hysteric behavior |
author_facet |
Boyu Wang Rishi Gupta |
author_sort |
Boyu Wang |
title |
Performance of Repaired Concrete under Cyclic Flexural Loading |
title_short |
Performance of Repaired Concrete under Cyclic Flexural Loading |
title_full |
Performance of Repaired Concrete under Cyclic Flexural Loading |
title_fullStr |
Performance of Repaired Concrete under Cyclic Flexural Loading |
title_full_unstemmed |
Performance of Repaired Concrete under Cyclic Flexural Loading |
title_sort |
performance of repaired concrete under cyclic flexural loading |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2021-03-01 |
description |
There is limited research reported on the effect of cyclic loading on cement-based repair materials as conducting such tests is time consuming. To overcome this issue, this study utilized a novel loading regime consisting of cycle groups with increasing stress amplitude to accelerate the test process. The Palmgren-Minder rule was used to estimate the fatigue life of repaired specimens. Specimens repaired with Mix M (cementitious repair mortar), which was estimated to have the highest 2-million-cycle fatigue endurance limit (77.4%), showed the longest fatigue life (95,991 cycles) during the cyclic loading test, the highest slant, and splitting bond strength among all repair mixes. The estimated two-million cycle fatigue endurance limit of Mix S (70.8%) was very similar to that was reported in literature (71%) using the traditional loading method. This study confirms the usefulness of Palmgren-Minder rule on estimating the fatigue life of repaired specimens. Additionally, the use of the novel loading regime showed the benefit of shortening the test process while producing results similar to those from using traditional loading methods. To improve the prediction accuracy, future research is required to modify the failure criteria to accommodate specimens that may not fail even when the average flexural strength is met. |
topic |
cyclic loading repair materials bond hysteric behavior |
url |
https://www.mdpi.com/1996-1944/14/6/1363 |
work_keys_str_mv |
AT boyuwang performanceofrepairedconcreteundercyclicflexuralloading AT rishigupta performanceofrepairedconcreteundercyclicflexuralloading |
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1724223422310907904 |