Seismic retrofitting of rectangular bridge piers with CFRP

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ConferenceConMat'05 Third International Conference on Construction Material: Performance, Innovations and Structural Implications: 22 August 2005, Vancouver, B.C.
Pages110; # of pages: 10
Subjectbridge piers, seismic strengthening, lap splice, ductility; Fibre-reinforced polymers (FRP); Bridges
AbstractIt has been observed during past seismic events that rebar splices at the bottom of bridge columns can produce collapse if not properly confined. Retrofitting techniques have been developed over the last thirty years to face this problem. These techniques, however, are difficultly applicable to rectangular columns with aspect ratio exceeding 2:1 because their efficiency relies on confinement. In order to address that issue, a research project has been initiated developing new concepts for retrofitting rectangular columns with inadequate lap splice detailing. One proposed technique is based on the use of carbon fibre reinforced polymer (CFRP) to limit the opening of splitting cracks that are responsible for the bond failure. The paper presents the main results of the flexural tests. The retrofitted specimens showed significant improvements compared to the control specimen: the use of CFRP changed the failure mechanism and delayed the opening of splitting cracks sufficiently for the reinforcement to yield. The brittle failure of the control specimen changed to a very ductile one for the retrofitted specimens.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number48365
NPARC number20377941
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Record identifier38c76c4f-dc93-441a-9dfe-9b346248acf1
Record created2012-07-24
Record modified2016-05-09
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