Print Email Facebook Twitter Coupled effects of corrosion damage and sustained loading on the flexural behavior of RC beams strengthened with CFRP anchorage system Title Coupled effects of corrosion damage and sustained loading on the flexural behavior of RC beams strengthened with CFRP anchorage system Author Pan, Tanbo (Tongji University) Zheng, Yonglai (Tongji University) Zhou, Yujue (Tongji University; Sanming University) Liu, Yongcheng (Tongji University) Yu, Kunlong (Tongji University) Zhou, Y. (TU Delft Applied Mechanics) Date 2022 Abstract This paper presents the results of an experimental study on the flexural behavior of carbon fibre reinforced polymer (CFRP) anchorage system strengthened reinforced concrete (RC) beams under the coupled effects of corrosion damage and sustained loading. The test beams were subjected to combined accelerated corrosion in 5% NaCl solution and sustained loads for 25, 50 and 100 days at 0% and 50% load levels of the virgin beam ultimate load capacity. The failure modes, load carrying capacity, deflection, ductility and strain response of the beams were investigated in detail. The results indicated that CFRP anchorage systems enhanced the yield and ultimate load of the corrosion-damaged beams. The use of CFRP anchorage system restored the ultimate load of corroded beams between 87.6% and 104.8% and the yield load between 81.9% and 92.7% with respect to those of the virgin beam. In contrast, the ductility and energy absorption index suffered a decline. CFRP-strengthened beams showed a reduction of 4.5%–28.9% for the ductility index compared with their counterparts without CFRP anchorage system. Sustained loads resulted in more considerable reductions in load-bearing capacity, greater loss of rebars mass, wider width of corrosion cracks, indicating a significant coupling effect between sustained loading and corrosion damage. Three typical failure modes of the CFRP-strengthened beams were observed and explained in the paper, thus revealing the failure mechanism of CFRP-strengthened beams. In the engineering practice of CFRP anchorage system, the coupled effects of corrosion damage and sustained loading on the strengthened systems should be taken into accountant comprehensively. Subject CFRP anchorage systemCorrosionFlexural behaviorReinforced concreteStrengtheningSustained loading To reference this document use: http://resolver.tudelft.nl/uuid:3e540878-2d5e-4f0a-b028-978cc958f967 DOI https://doi.org/10.1016/j.compstruct.2022.115416 Embargo date 2023-07-01 ISSN 0263-8223 Source Composite Structures, 289 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2022 Tanbo Pan, Yonglai Zheng, Yujue Zhou, Yongcheng Liu, Kunlong Yu, Y. Zhou Files PDF 1_s2.0_S0263822322002136_main.pdf 9.98 MB Close viewer /islandora/object/uuid:3e540878-2d5e-4f0a-b028-978cc958f967/datastream/OBJ/view