Abstract
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.
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The authors acknowledge the financial support provided by the National Natural Science Fund of China (No. 51568008).
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Deng, L., Zhong, M., Liu, Y. et al. Study on the Flexural Fatigue Performance of CFRP-OFBG Plate Reinforced Damaged Steel Beams. KSCE J Civ Eng 25, 4686–4697 (2021). https://doi.org/10.1007/s12205-021-1138-y
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DOI: https://doi.org/10.1007/s12205-021-1138-y