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

journal contribution
posted on 1990-01-03, 00:00 authored by Frank CollinsFrank Collins, H Roper
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.

History

Journal

ACI Materials Journal

Volume

87

Issue

2

Pagination

149 - 159

Publisher

American Concrete Institute

Location

Farmington Hills, Mich.

ISSN

0889-325X

Language

eng

Publication classification

CN.1 Other journal article

Copyright notice

1990, American Concrete Institute