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http://dx.doi.org/10.12989/sem.2009.32.5.649

Numerical modelling of FRP strengthened RC beam-column joints  

Mahini, Seyed S. (Department of Civil Engineering, Yazd University)
Ronagh, Hamid R. (Division of Civil Engineering, School of Engineering, The University of Queensland)
Publication Information
Structural Engineering and Mechanics / v.32, no.5, 2009 , pp. 649-665 More about this Journal
Abstract
This paper reports part of a comprehensive research study conducted at the University of Queensland on the ability of CFRP web-bonded systems in strengthening an exterior beam-column joint subjected to monotonic loads. One 1/2.2 scaled plain and four CFRP repaired/retrofitted joints subjected to monotonic loads were analysed using the nonlinear finite-element program ANSYS and the results were calibrated against experiments. The ANSYS model was employed in order to account for tension stiffening in concrete after cracking and a modified version of the Hognestad's model was used to model the concrete compressive strength. The stress-strain properties of main steel bars were modelled using multilinear isotropic hardening model and the FRPs were modelled as anisotropic materials. A perfect bond was assumed as nodes were shared between adjacent elements irrespective of their type. Good agreement between the numerical predictions and the experimental observation of the failure mechanisms for all specimens were observed. Closeness of these results proved that the numerical analysis can be used by design engineers for the analysis of web-bonded FRP strengthened beam-column joints with confidence.
Keywords
reinforced concrete; joints; strengthening; fibre reinforced plastics; finite element method; nonlinear analysis;
Citations & Related Records

Times Cited By Web Of Science : 9  (Related Records In Web of Science)
Times Cited By SCOPUS : 10
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