Many beam structures suffer from gradual performance degradation with the increase of service life.To recover the bearing capacity of these beams,carbon fiber reinforced polymer(CFRP)plates are developed to attached o...Many beam structures suffer from gradual performance degradation with the increase of service life.To recover the bearing capacity of these beams,carbon fiber reinforced polymer(CFRP)plates are developed to attached on the beam bottom.To check the structural performance of the CFRP reinforced beams,smart CFRP plate with FBGs in series is designed and LVDTs are adopted to measure the deformations.The deflection of the reinforced beam is given based on the elastic conversion cross-section method.The experimental results validate the effectiveness of the proposed algorithm.The study shows that the CFRP reinforced zone has a larger flexural rigidity than the pure steel beam zone.The general distribution of the deflection along the span of the CFRP reinforced beam can be described by the proposed formula.It provides a scientific design guidance for the deflection control of CFRP reinforced structures.展开更多
基金The work described in this paper was supported by the National Natural Science Foundation of China(Grant No.51908263)Double First-Class(First-Class University&First-Class Disciplines)Funds of Lanzhou University(Grant No.561119201)+1 种基金the Fundamental Research Funds for the Central Universities(Grant No.lzujbky-2020-56)Key Laboratory of Structures Dynamic Behavior and Control(Ministry of Education)in Harbin Institute of Technology(Grant No.HITCE201901).
文摘Many beam structures suffer from gradual performance degradation with the increase of service life.To recover the bearing capacity of these beams,carbon fiber reinforced polymer(CFRP)plates are developed to attached on the beam bottom.To check the structural performance of the CFRP reinforced beams,smart CFRP plate with FBGs in series is designed and LVDTs are adopted to measure the deformations.The deflection of the reinforced beam is given based on the elastic conversion cross-section method.The experimental results validate the effectiveness of the proposed algorithm.The study shows that the CFRP reinforced zone has a larger flexural rigidity than the pure steel beam zone.The general distribution of the deflection along the span of the CFRP reinforced beam can be described by the proposed formula.It provides a scientific design guidance for the deflection control of CFRP reinforced structures.
