Numerical investigation on the hysteretic behaviour of RC joints retrofitted with different CFRP configurations

Dalalbashi, A., Eslami, A. and Rongh, H. R. (2013) Numerical investigation on the hysteretic behaviour of RC joints retrofitted with different CFRP configurations. Journal of Composites For Construction, 17 3: 371-382. doi:10.1061/(ASCE)CC.1943-5614.0000361


Author Dalalbashi, A.
Eslami, A.
Rongh, H. R.
Title Numerical investigation on the hysteretic behaviour of RC joints retrofitted with different CFRP configurations
Journal name Journal of Composites For Construction   Check publisher's open access policy
ISSN 1090-0268
1943-5614
Publication date 2013-06
Sub-type Article (original research)
DOI 10.1061/(ASCE)CC.1943-5614.0000361
Volume 17
Issue 3
Start page 371
End page 382
Total pages 12
Place of publication Reston, VA, United States
Publisher American Society of Civil Engineers
Collection year 2014
Language eng
Formatted abstract
The strengthening of beam-column joints in RC structures is considered an effective approach for improving their seismic resistance and overall performance. This paper presents a numerical investigation into the effectiveness of carbon fiber–reinforced polymer (CFRP) sheets in enhancing the seismic performance of RC joints under combined axial and cyclic loads. For this purpose, a case-study joint subassemblage was retrofitted using three different retrofitting configurations (L-shaped, web bonded, and flange bonded), all commonly used for external strengthening with composite materials. Following the verification of the nonlinear numerical model against the existing experimental data, the analysis outcomes of the retrofitted specimens were compared with those of the control specimen in terms of the tip beam load distribution versus tip beam displacement, energy dissipation, and plastic hinge relocation. Compared with the results of the original joint, the results of the retrofitted joints confirmed an improved load-carrying capacity for all strengthening schemes. However, some configurations led to a decrease in the ductility and dissipated energy. It was shown that the L-shaped and flange-bonded retrofitting schemes could relocate the plastic hinge from the column face toward the beam. This represents a good outcome because it can potentially eliminate the possibility of joint core brittle failure.
Keyword RC beam-column joint
Cyclic load
Nonlinear finite element (FE) analysis
Carbon fiber–reinforced polymer (CFRP)
Hysteretic behavior
Retrofitting
Concrete beams
Reinforced concrete
Joints
Cyclic loads
Finite element method
Rehabilitation
Numerical analysis
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 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 11 Sep 2013, 13:49:10 EST by Julie Hunter on behalf of School of Civil Engineering