Laboratory investigation of shear repair of reinforced concrete beams loaded in flexure

Collins, Francis and Roper, Harold 1990, Laboratory investigation of shear repair of reinforced concrete beams loaded in flexure, ACI Materials Journal, vol. 87, no. 2, pp. 149-159.

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Title Laboratory investigation of shear repair of reinforced concrete beams loaded in flexure
Author(s) Collins, FrancisORCID iD for Collins, Francis
Roper, Harold
Journal name ACI Materials Journal
Volume number 87
Issue number 2
Start page 149
End page 159
Total pages 11
Publisher American Concrete Institute
Place of publication Farmington Hills, Mich.
Publication date 1990-01-03
ISSN 0889-325X
Keyword(s) beams (supports)
epoxy resins
flexural strengths
loads (forces)
shear strength
Materials Research
Science & Technology
Construction & Building Technology
Materials Science, Multidisciplinary
Materials Science
Summary The structural rehabilitation of reinforced concrete beams in shear was studied, with particular attention paid to resin injection. Other shear repair techniques that were examined include post-tensioning in shear, bar bonding, and stitching. Emphasis was placed on the influence of damage across the repair interface due to unloading while propping during the repair stage. A series of model beams, unreinforced in shear, were loaded in the laboratory until a major diagonal tension crack developed on both shear spans. Individual beams were unloaded to a set proportion of that load, repaired, and again loaded to failure. Scaled field-size beams were also tested. The repair strength achieved for resin-injected reinforced concrete beams was shown to be influenced by the condition of the major diagonal crack after initial damage. This conclusion was supported by surface strain measurements, load-deflection data, and crack measurements.
Language eng
Field of Research 0905 Civil Engineering
0912 Materials Engineering
1202 Building
HERDC Research category CN.1 Other journal article
Copyright notice ©1990, American Concrete Institute
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