Sagging and hogging strengthening of continuous unbonded posttensioned HSC beams by NSM and EBR

Ghasemi, Saeed, Akbar Maghsoudi, Ali, Akbarzadeh Bengar, Habib and Ronagh, Hamid Reza (2016) Sagging and hogging strengthening of continuous unbonded posttensioned HSC beams by NSM and EBR. Journal of Composites for Construction, 20 2: . doi:10.1061/(ASCE)CC.1943-5614.0000621


Author Ghasemi, Saeed
Akbar Maghsoudi, Ali
Akbarzadeh Bengar, Habib
Ronagh, Hamid Reza
Title Sagging and hogging strengthening of continuous unbonded posttensioned HSC beams by NSM and EBR
Journal name Journal of Composites for Construction   Check publisher's open access policy
ISSN 1090-0268
1943-5614
Publication date 2016-04-01
Year available 2015
Sub-type Article (original research)
DOI 10.1061/(ASCE)CC.1943-5614.0000621
Open Access Status Not yet assessed
Volume 20
Issue 2
Total pages 13
Place of publication Reston, VA, United States
Publisher American Society of Civil Engineers
Collection year 2017
Language eng
Abstract Continuous unbonded posttensioned concrete beams might require strengthening to cope with higher demands. Strengthening with carbon-fiber-reinforced plastics (CFRP) is a viable option; however, because of the limited number of studies in this area and lack of experimental data, the guidelines covered only bonded prestressed concrete members, in particular when these are made from high-strength concrete (HSC). This paper reports on the results of an experimental investigation on the flexural behavior of continuous unbonded posttensioned HSC beams strengthened using CFRP. In this application, the CFRP is either externally bonded reinforcement (EBR) or internally near-surface mounted (NSM) in both hogging and sagging regions. The results show that both service and ultimate states of continuous unbonded posttensioned concrete beams were considerably improved by CFRP strengthening, and also that the efficiency of the NSM method is greater than that of the EBR method, especially in crack propagation and ultimate load.
Keyword Carbon-fiber-reinforced plastics (CFRP)
Continuous beams
Externally bonded reinforcement (EBR)
Flexural behavior
Near-surface mounted (NSM)
Posttensioned concrete
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
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