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A platform for research: civil engineering, architecture and urbanism
Study on the Flexural Fatigue Performance of CFRP-OFBG Plate Reinforced Damaged Steel Beams
https://orcid.org/https://orcid.org/0000-0003-0297-4565
https://orcid.org/https://orcid.org/0000-0002-6919-8065
https://orcid.org/https://orcid.org/0000-0001-9162-4895
https://orcid.org/https://orcid.org/0000-0003-3650-107X
https://orcid.org/https://orcid.org/0000-0003-2659-0232
https://orcid.org/https://orcid.org/0000-0001-8243-124X
https://orcid.org/https://orcid.org/0000-0001-8080-6458
This paper studies the flexural fatigue performance of damaged steel beams strengthened by carbon fiber reinforced plastic-optical fiber bragg grating (CFRP-OFBG) plates. By analyzing the test beam’s failure mechanism under cyclic loading and the strain data monitored by the CFRP-OFBG panel in real-time, a life prediction model based on cumulative fatigue damage is proposed. The test results show that CFRP-OFBG plate reinforcement effectively reduces the fatigue crack growth rate of damaged steel beams and increases the fatigue life of damaged steel beams by 22.46%. The analysis and test results show that the minimum error between the calculated value of the life prediction model and the test value is −24.13%, and the maximum error is −5.61%. This study provides some suggestions for improving the service life of existing fatigue-damaged steel beams and establishing a simple fatigue life evaluation model.
Study on the Flexural Fatigue Performance of CFRP-OFBG Plate Reinforced Damaged Steel Beams
https://orcid.org/https://orcid.org/0000-0003-0297-4565
https://orcid.org/https://orcid.org/0000-0002-6919-8065
https://orcid.org/https://orcid.org/0000-0001-9162-4895
https://orcid.org/https://orcid.org/0000-0003-3650-107X
https://orcid.org/https://orcid.org/0000-0003-2659-0232
https://orcid.org/https://orcid.org/0000-0001-8243-124X
https://orcid.org/https://orcid.org/0000-0001-8080-6458
This paper studies the flexural fatigue performance of damaged steel beams strengthened by carbon fiber reinforced plastic-optical fiber bragg grating (CFRP-OFBG) plates. By analyzing the test beam’s failure mechanism under cyclic loading and the strain data monitored by the CFRP-OFBG panel in real-time, a life prediction model based on cumulative fatigue damage is proposed. The test results show that CFRP-OFBG plate reinforcement effectively reduces the fatigue crack growth rate of damaged steel beams and increases the fatigue life of damaged steel beams by 22.46%. The analysis and test results show that the minimum error between the calculated value of the life prediction model and the test value is −24.13%, and the maximum error is −5.61%. This study provides some suggestions for improving the service life of existing fatigue-damaged steel beams and establishing a simple fatigue life evaluation model.
Study on the Flexural Fatigue Performance of CFRP-OFBG Plate Reinforced Damaged Steel Beams
https://orcid.org/https://orcid.org/0000-0003-0297-4565
https://orcid.org/https://orcid.org/0000-0002-6919-8065
https://orcid.org/https://orcid.org/0000-0001-9162-4895
https://orcid.org/https://orcid.org/0000-0003-3650-107X
https://orcid.org/https://orcid.org/0000-0003-2659-0232
https://orcid.org/https://orcid.org/0000-0001-8243-124X
https://orcid.org/https://orcid.org/0000-0001-8080-6458
This paper studies the flexural fatigue performance of damaged steel beams strengthened by carbon fiber reinforced plastic-optical fiber bragg grating (CFRP-OFBG) plates. By analyzing the test beam’s failure mechanism under cyclic loading and the strain data monitored by the CFRP-OFBG panel in real-time, a life prediction model based on cumulative fatigue damage is proposed. The test results show that CFRP-OFBG plate reinforcement effectively reduces the fatigue crack growth rate of damaged steel beams and increases the fatigue life of damaged steel beams by 22.46%. The analysis and test results show that the minimum error between the calculated value of the life prediction model and the test value is −24.13%, and the maximum error is −5.61%. This study provides some suggestions for improving the service life of existing fatigue-damaged steel beams and establishing a simple fatigue life evaluation model.
Study on the Flexural Fatigue Performance of CFRP-OFBG Plate Reinforced Damaged Steel Beams
KSCE J Civ Eng
Deng, Langni (author) / Zhong, Mengjun (author) / Liu, Yang (author) / Liao, Ling (author) / Lai, Shijin (author) / Lei, Lizhen (author) / Zhou, Zheng (author)
KSCE Journal of Civil Engineering ; 25 ; 4686-4697
2021-12-01
12 pages
Article (Journal)
Electronic Resource
English
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