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Compressive behavior of FRP-confined ultra-high performance concrete (UHPC) in circular columns
Liao, Jin Jing1,2; Yang, Kristin Y.1; Zeng, Jun Jie1,3; Quach, Wai Meng3; Ye, Yu Yi1; Zhang, Lihai2
2021-12-15
Source PublicationEngineering Structures
ISSN0141-0296
Volume249Pages:113246
Abstract

Ultra-high performance concrete (UHPC) usually exhibits a weak ductility under axial compression. However, the ductility can be enhanced by implementing confining devices such as fiber-reinforced polymer (FRP) wraps. In order to gain in-depth understandings on the compressive behavior of FRP-confined UHPC, axial compression tests on 52 FRP-confined and 12 unconfined UHPC cylinders were carried out in this study. The failure modes, stress-strain behaviors, confinement efficiency, and the influences of crucial variables (steel fiber contents, specimen sizes, FRP fiber types, and FRP thickness) on the compressive behavior of FRP-confined UHPC were investigated and discussed. Results show that the increase in steel fiber content could increase the first peak stress and its corresponding strain, hoop strain efficiency, avoid the abrupt stress reduction after the first peak stress, as well as alleviating the effect of specimen sizes. Addition of steel fibers also alters the actual confinement ratio threshold for sufficient confinement. Comparisons suggest that FRP confinement fiber types have limited influence on the normalized stress-strain behavior of specimens with similar level of actual confinement ratio. Additionally, performances of four existing axial stress-strain models for FRP-confined concrete are verified and the results reveal that Teng et al.’s model performs the best although this model is incapable in capturing the strain softening behavior after the first peak stress.

KeywordAxial Compression Confinement Effectiveness Fiber-reinforced Polymer (Frp) Specimen Size Steel Fiber Content Ultra-high Performance Concrete (Uhpc)
DOI10.1016/j.engstruct.2021.113246
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Civil
WOS IDWOS:000707499700005
PublisherELSEVIER SCI LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Scopus ID2-s2.0-85116646372
Fulltext Access
FWCI9.258128
Citation statistics
Document TypeJournal article
CollectionFaculty of Science and Technology
DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding AuthorZeng, Jun Jie; Quach, Wai Meng
Affiliation1.Department of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, China
2.Department of Infrastructure Engineering, The University of Melbourne, 3010, Australia
3.Department of Civil and Environmental Engineering, University of Macau, Macau,
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Liao, Jin Jing,Yang, Kristin Y.,Zeng, Jun Jie,et al. Compressive behavior of FRP-confined ultra-high performance concrete (UHPC) in circular columns[J]. Engineering Structures,2021,249:113246.
APA Liao, Jin Jing,Yang, Kristin Y.,Zeng, Jun Jie,Quach, Wai Meng,Ye, Yu Yi,&Zhang, Lihai.(2021).Compressive behavior of FRP-confined ultra-high performance concrete (UHPC) in circular columns.Engineering Structures,249,113246.
MLA Liao, Jin Jing,et al."Compressive behavior of FRP-confined ultra-high performance concrete (UHPC) in circular columns".Engineering Structures 249(2021):113246.
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