Cyclic stress-strain model for FRP-confined concrete considering post-peak softening

Li, P, Wu, Y, Zhou, Y and Xing, F 2018, 'Cyclic stress-strain model for FRP-confined concrete considering post-peak softening', Composite Structures, vol. 201, pp. 902-915.


Document type: Journal Article
Collection: Journal Articles

Title Cyclic stress-strain model for FRP-confined concrete considering post-peak softening
Author(s) Li, P
Wu, Y
Zhou, Y
Xing, F
Year 2018
Journal name Composite Structures
Volume number 201
Start page 902
End page 915
Total pages 14
Publisher Elsevier
Abstract The majority of existing cyclic stressstrain 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 stressstrain curves, a stressstrain 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.
Subject Structural Engineering
Keyword(s) Concrete
Confinement rigidity
Cyclic loading
FRP
Strain softening
Stressstrain model
DOI - identifier 10.1016/j.compstruct.2018.06.088
Copyright notice © 2018 Elsevier Ltd
ISSN 0263-8223
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