Flexural strengthening of continuous unbonded post-tensioned concrete beams with end-anchored CFRP laminates

Ghasemi, Saeed, Maghsoudi, Ali A., Bengar, Habib A. and Ronagh, Hamid R. (2015) Flexural strengthening of continuous unbonded post-tensioned concrete beams with end-anchored CFRP laminates. Structural Engineering and Mechanics, 53 6: 1083-1104. doi:10.12989/sem.2015.53.6.1083

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Author Ghasemi, Saeed
Maghsoudi, Ali A.
Bengar, Habib A.
Ronagh, Hamid R.
Title Flexural strengthening of continuous unbonded post-tensioned concrete beams with end-anchored CFRP laminates
Journal name Structural Engineering and Mechanics   Check publisher's open access policy
ISSN 1225-4568
1598-6217
Publication date 2015-03
Year available 2015
Sub-type Article (original research)
DOI 10.12989/sem.2015.53.6.1083
Open Access Status File (Publisher version)
Volume 53
Issue 6
Start page 1083
End page 1104
Total pages 22
Place of publication Korea, Republic of
Publisher Techno Press
Collection year 2016
Language eng
Formatted abstract
This paper provides the results of an experimental investigation into the flexural behavior of continuous two-span unbonded post-tensioned high strength concrete (HSC) beams, strengthened by end-anchored CFRP laminates of different configurations in the hogging region. Implementing two different configurations of end-anchorage systems consisting of steel plates and bolts and carefully monitoring the development of strains throughout the load history using sufficiently large number of strain gauges, the response of beams including the observed crack propagations, beam deflection, modes of failure, capacity enhancement at service and ultimate and the amount of moment redistribution are measured, presented and discussed. The study is appropriate in the sense that it covers the more commonly occurring two span beams instead of the simply supported beams investigated by others. The experiments reconfirmed the finding of others that proper installation of composite strengthening system is most important in the quality of the bond which is essential for the internal transfer of forces. It was also found that for the tested two span continuous beams, the capacity enhancement is more pronounced at the serviceability level than the ultimate. This is an important finding as the design of these beams is mostly governed by the serviceability limit state signifying the appropriateness of the suggested strengthening method. The paper provides quantitative data on the amount of this capacity enhancement.
Keyword Strengthening
CFRP laminate
Hsc
Unbonded post-tensioned
Continuous beams
Ebr
Reinforced Polymer Strips
Rc
Composites
Girders
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
Official 2016 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 2 times in Scopus Article | Citations
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