Axial stress-strain behavior of CFRP-confined geopolymer concrete

ZHOU Huafei; HONG Hengda; XIE Ziling; DONG Xinyi

doi:10.13801/j.cnki.fhclxb.20230522.001

Volume 41 Issue 1

Jan. 2024

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ZHOU Huafei, HONG Hengda, XIE Ziling, et al. Axial stress-strain behavior of CFRP-confined geopolymer concrete[J]. Acta Materiae Compositae Sinica, 2024, 41(1): 323-334. doi: 10.13801/j.cnki.fhclxb.20230522.001

Citation:

ZHOU Huafei, HONG Hengda, XIE Ziling, et al. Axial stress-strain behavior of CFRP-confined geopolymer concrete[J]. Acta Materiae Compositae Sinica, 2024, 41(1): 323-334. doi: 10.13801/j.cnki.fhclxb.20230522.001

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Axial stress-strain behavior of CFRP-confined geopolymer concrete

doi: 10.13801/j.cnki.fhclxb.20230522.001

ZHOU Huafei^{1, 2},
HONG Hengda¹,
XIE Ziling^{3, 4
,
,},
DONG Xinyi¹

1.
College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310023, China
2.
Zhejiang Key Laboratory of Civil Engineering Structures & Disaster Prevention and Mitigation Technology (Zhejiang University of Technology), Hangzhou 310023, China
3.
College of Civil Engineering and Architecture, Wenzhou University, Wenzhou 325035, China
4.
Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province (Wenzhou University), Wenzhou 325035, China

Funds: National Natural Science Foundation of China (52278320); Zhejiang Provincial Natural Science Foundation of China (LGF21E080010)

Received Date: 2023-03-29
Accepted Date: 2023-05-15
Rev Recd Date: 2023-05-04

Available Online: 2023-05-23

Publish Date: 2024-01-01

Abstract

Abstract

To investigate the stress-strain behavior of geopolymer concrete (GPC) under multi-axial stress states, axial compression tests were conducted on GPC columns with and without carbon fiber reinforced polymer (CFRP) confinement. The characteristics of stress-strain curves for GPC under various confinement conditions were examined, and models for axial stress-strain, compressive strength, and ultimate axial compressive strain were established. Specifically, novel expressions for model parameters were proposed for CFRP-confined normal strength GPC, and the model was validated using experimental results from other studies. The results demonstrate that the compressive strength model has good predictive capability, with an average absolute error of 3.55%. Additionally, the ultimate axial compressive strain model accurately predicts experimental results from other studies, with an average absolute error of 17.03%. The newly proposed parameter expressions for the axial stress-strain model are applicable not only to CFRP-confined high-strength GPC but also to CFRP-confined normal strength GPC.
- geopolymer concrete,
- fiber-reinforced polymer,
- stress-strain model,
- ultimate condition,
- passive confinement
Long Abstrsct
Innovation Points

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References(38)

References

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