Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6703393 | Composite Structures | 2018 | 13 Pages |
Abstract
The majority of existing cyclic stress-strain models for fiber reinforced polymer (FRP) confined concrete are applicable only to cases where post-peak strain hardening occurs. Cyclic model catering for strain softening is rare due to the lack of sufficient experimental data. Recent experimental tests on FRP-confined concrete cylinders involving strain-softening have identified new factors that have a significant effect on the cyclic behavior. Through an analytical study, a newly defined parameter, the effective confinement rigidity, is found to be a key factor governing the cyclic softening and hardening. By including the additional key factors and using the latest database with more strain-softening cyclic stress-strain curves, a stress-strain model of FRP-confined concrete subjected to cyclic loading considering both post-peak hardening and softening is proposed. Compared with the existing models, the proposed model can predict the cyclic behavior of FRP-confined concrete with better accuracy.
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Authors
Pengda Li, Yu-Fei Wu, Yingwu Zhou, Feng Xing,