This work aims to investigate the flexural behaviour of continuous hybrid
reinforced concrete T-beams (HRCT). The investigations consist of three parts;
the computational part, the experimental part and the finite element analysis. The
computational part included two parts, the first one is developing an analytical
programme using MATLAB software to investigate the moment-curvature
behaviour of HRCT-beams and to design the experimental specimens. This was
followed by the experimental part, where six full-scale reinforced concrete
continuous T beams were prepared and tested. One beam was reinforced with
glass fibre reinforced polymer (GFRP) bars while the other five beams were
reinforced with a different combination of GFRP and steel bars. The ratio of GFRP
to steel reinforcement at both mid-span and middle-support sections was the
main parameter investigated. The results showed that adding steel reinforcement
to GFRP reinforced concrete T-beams improves the axial stiffness, ductility and
serviceability in terms of crack width and deflection control. However, the moment
redistribution at failure was limited because of the early yielding of steel
reinforcement at the beam section that did not reach its moment capacity and
could still carry more loads due to the presence of FRP reinforcement.
The second part of the computational part included the comparison between the
experimental results with the ultimate moment prediction of ACI 440.2R-17, and
with the existing theoretical equations for moment capacity, load capacity, and
deflection prediction. It was found that the ACI 440.2R-17 design code equations
reasonably estimated the moment capacity of both mid-span and middle-support
sections and consequently predicted the load capacity of the HRCT-beams
based on fully ductile behaviour. However, Qu's and Safan's equations
underestimated the predicted moment and load-capacity of HRCT-beams. Also,
Bischoff's and Yoon's models underestimated the deflection at all stages of the
load for both GFRP and HRCT- beams.
For the numerical part, a three-dimensional finite element model has been
developed using ABAQUS software to examine the behaviour of HRCT-beams.
The experimental results were used to validate the accuracy of the FEM, where
an acceptable agreement between the simulated and experimental results was
observed. Accordingly, the model was used to predict the structural behaviour of
continuous HRCT-beams by testing different parameters.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/19039 |
| Date | January 2020 |
| Creators | Almahmood, Hanady A.A. |
| Contributors | Ashour, Ashraf, Sheehan, Therese |
| Publisher | University of Bradford, Faculty of Engineering & Informatics |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Thesis, doctoral, PhD |
| Rights | <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>. |
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