American Society of Civil Engineers


Analysis of Moment Redistribution in Fiber-Reinforced Polymer Plated RC Beams


by Matthew Haskett, Ph.D., (Student, School of Civil, Environmental and Mining Engineering, Univ. of Adelaide, South Australia 5005, Australia), Deric John Oehlers, (corresponding author), (Professor, School of Civil, Environmental and Mining Engineering, Univ. of Adelaide, South Australia 5005, Australia E-mail: doehlers@civeng.adelaide.edu.au), Mohamed Ali, (Senior Research Associate, M.S., School of Civil, Environmental and Mining Engineering, Univ. of Adelaide, South Australia 5005, Australia), and Chengqing Wu, (Senior Lecturer, School of Civil, Environmental and Mining Engineering, Univ. of Adelaide, South Australia 5005, Australia)

Journal of Composites for Construction, Vol. 14, No. 4, July/August 2010, pp. 424-433, (doi:  http://dx.doi.org/10.1061/(ASCE)CC.1943-5614.0000098)

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Document type: Journal Paper
Abstract: Ductility of RC structures has always been a classical area of concrete research. Given the complexity of the problem, the great mass of research investigating ductility, and specifically, moment redistribution and rotational capacities, has used empirical approaches to quantify moment redistribution and invariably assumed that concrete crushing is the singular mode of failure. With the advent of new reinforcement materials such as fiber reinforced polymers, these empirical approaches are not necessarily appropriate as failure modes other than concrete crushing can occur. In this paper, the empirical approaches to moment redistribution are replaced by a structural mechanics approach that incorporates moment rotation directly into moment redistribution. A structural mechanics method for determining moment and rotation at failure for any RC section with any material properties is first presented and this is followed by a structural mechanics model for moment redistribution; these enable the moment redistribution capacities of any RC section to be quantified. Moment redistribution capacities of various sections are analyzed and it is shown that plated sections can have significant moment redistribution capacities much of which can be used in design.


ASCE Subject Headings:
Reinforced concrete
Moment distribution
Ductility
Fiber reinforced polymer
Concrete beams
Rotation
Hinges

Author Keywords:
Reinforced concrete
Beams
Moment redistribution
Member ductility
Fiber reinforced polymer
FRP
Rotation
Hinges