Evaluation of the seismic performance of reinforced concrete frames strengthened with CFRP fabric and NSM bars

Evaluation of the seismic performance of reinforced concrete frames strengthened with CFRP fabric... An experimental program was conducted to evaluate the seismic performance of rigid frames strengthened with externally bonded CFRP fabric and near-surface mounted (NSM) CFRP bars. Three rigid frame specimens were subjected to cyclic loading. The three specimens were identical in size and internal reinforcement. One specimen served as control while the other two specimens were strengthened using CFRP fabric and NSM bars such that they have equivalent capacity at first yielding. CFRP wraps were used on the strengthened specimens to anchor the main CFRP sheets and NSM bars and to prevent/delay debonding of the FRP reinforcement. Test results indicated that both techniques delay the yielding of the internal steel reinforcement and result in an increase in the flexural strength of the members, an increase in energy dissipation, and a decrease in stiffness degradation. However, the load-deflection response for both strengthening techniques flattens shortly after yielding of internal steel due to localized debonding of the fabric and the bars, unlike monotonic loading which typically shows post-yielding stiffness. Results also showed that strengthening with CFRP fabric results in fewer cracks, more energy dissipation, and less strength degradation after yielding than strengthening with NSM bars where the latter results in higher ultimate strength. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Composite Structures Elsevier

Evaluation of the seismic performance of reinforced concrete frames strengthened with CFRP fabric and NSM bars

Loading next page...
 
/lp/elsevier/evaluation-of-the-seismic-performance-of-reinforced-concrete-frames-RkfsJSMxJw
Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0263-8223
eISSN
1879-1085
D.O.I.
10.1016/j.compstruct.2017.10.069
Publisher site
See Article on Publisher Site

Abstract

An experimental program was conducted to evaluate the seismic performance of rigid frames strengthened with externally bonded CFRP fabric and near-surface mounted (NSM) CFRP bars. Three rigid frame specimens were subjected to cyclic loading. The three specimens were identical in size and internal reinforcement. One specimen served as control while the other two specimens were strengthened using CFRP fabric and NSM bars such that they have equivalent capacity at first yielding. CFRP wraps were used on the strengthened specimens to anchor the main CFRP sheets and NSM bars and to prevent/delay debonding of the FRP reinforcement. Test results indicated that both techniques delay the yielding of the internal steel reinforcement and result in an increase in the flexural strength of the members, an increase in energy dissipation, and a decrease in stiffness degradation. However, the load-deflection response for both strengthening techniques flattens shortly after yielding of internal steel due to localized debonding of the fabric and the bars, unlike monotonic loading which typically shows post-yielding stiffness. Results also showed that strengthening with CFRP fabric results in fewer cracks, more energy dissipation, and less strength degradation after yielding than strengthening with NSM bars where the latter results in higher ultimate strength.

Journal

Composite StructuresElsevier

Published: Jan 15, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off