Numerical assessment of continuous prestressed NSC and HSC members with external CFRP tendons
Numerical assessment of continuous prestressed NSC and HSC members with external CFRP tendons
Carbon fiber reinforced polymer (CFRP) is a promising material for prestressing tendons. This study assesses the structural performance of continuous prestressed members with external CFRP tendons, focusing on the effect of using high-strength concrete (HSC) instead of normal-strength concrete (NSC). A nonlinear model is introduced and numerical tests are then carried out. Three concrete cylinder compressive strengths of 40, 60 and 90 MPa are used. The area of external CFRP tendons varies from 200 to 1700 mm2. The results show that the effect of using HSC instead of NSC heavily depends on the area of external CFRP tendons. In general, HSC members with external CFRP tendons exhibits considerably different response characteristics from those of NSC ones, including cracking, deformations, tendon and rebar stresses, neutral axis depths and so on. The concrete grade influence on moment redistribution is found to be negligible, provided that the members demonstrate favorable ductility. The rules in ACI 318-14 concerning the unbonded tendon stress and the redistribution of moments are evaluated.
CFRP tendons, Continuous member, High-strength concrete, Structural response
1-15
Lou, Tiejoing
ea63fc1f-edbf-42e9-91c8-3a9a95a27e9b
Min, Di
4171bb56-a005-4cf5-8566-b0198ace1229
Sun, Wei
9ffbe0cc-7fbf-447f-a054-62c2e18e6fd0
Chen, Bo
b7fc7e3c-c16d-44cd-868a-2fb6a4af6965
15 February 2020
Lou, Tiejoing
ea63fc1f-edbf-42e9-91c8-3a9a95a27e9b
Min, Di
4171bb56-a005-4cf5-8566-b0198ace1229
Sun, Wei
9ffbe0cc-7fbf-447f-a054-62c2e18e6fd0
Chen, Bo
b7fc7e3c-c16d-44cd-868a-2fb6a4af6965
Lou, Tiejoing, Min, Di, Sun, Wei and Chen, Bo
(2020)
Numerical assessment of continuous prestressed NSC and HSC members with external CFRP tendons.
Composite Structures, 234, , [111671].
(doi:10.1016/j.compstruct.2019.111671).
Abstract
Carbon fiber reinforced polymer (CFRP) is a promising material for prestressing tendons. This study assesses the structural performance of continuous prestressed members with external CFRP tendons, focusing on the effect of using high-strength concrete (HSC) instead of normal-strength concrete (NSC). A nonlinear model is introduced and numerical tests are then carried out. Three concrete cylinder compressive strengths of 40, 60 and 90 MPa are used. The area of external CFRP tendons varies from 200 to 1700 mm2. The results show that the effect of using HSC instead of NSC heavily depends on the area of external CFRP tendons. In general, HSC members with external CFRP tendons exhibits considerably different response characteristics from those of NSC ones, including cracking, deformations, tendon and rebar stresses, neutral axis depths and so on. The concrete grade influence on moment redistribution is found to be negligible, provided that the members demonstrate favorable ductility. The rules in ACI 318-14 concerning the unbonded tendon stress and the redistribution of moments are evaluated.
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More information
Accepted/In Press date: 3 November 2019
e-pub ahead of print date: 5 November 2019
Published date: 15 February 2020
Keywords:
CFRP tendons, Continuous member, High-strength concrete, Structural response
Identifiers
Local EPrints ID: 437771
URI: http://eprints.soton.ac.uk/id/eprint/437771
ISSN: 0263-8223
PURE UUID: 3e3b216b-1af7-488e-a043-3addac0b58e1
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Date deposited: 14 Feb 2020 17:33
Last modified: 16 Mar 2024 05:53
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Contributors
Author:
Tiejoing Lou
Author:
Di Min
Author:
Wei Sun
Author:
Bo Chen
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