00378774

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http://onlinepubs.trb.org...s/trr/1983/903/903-003.pdf

https://scholar.google.co...Beal&publication_year=1983

A 52-year-old reinforced concrete T-beam bridge was destructively tested to evaluate the consequences of concrete deterioration on load capacity. Instrumentation included measuring tension and compression rebar strain at midspan, end rotation, and midspan deflection. The single- and double-T test specimens were loaded symmetrically to produce a constant-moment region at midspan. The condition of the bridge was rated 2.5 on a scale from 1 (potentially hazardous) to 7 (new condition). The concrete deck was highly fractured throughout and the cement paste severely deteriorated locally. Efflorescence was common and leakage was evident. Tension rebars exposed by spalled concrete had lost 1-2 percent of their cross-sectional area. It is concluded that the deterioration noted has no significance with respect to the load-carrying capacity of the structure. Based on theoretical arguments, it is concluded that deterioration sufficient for substantial reduction in the capacity of a structure would be manifested in a local collapse and that overall failure of reinforced concrete T-beam bridges need not be a concern. (Author)

Publication of this paper sponsored by Committee on Dynamics and Field Testing of Bridges. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01418812

pp 15-21

1983

Transportation Research Record

62nd Annual Meeting of the Transportation Research Board

0309035171

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Figures (8) ; Photos (1) ; References (11)

Bearing capacity; Cement paste; Deterioration; Failure; Leakage; Load tests; Reinforced concrete bridges; Reinforcing bars; T beams; Tension

Efflorescence; Rebars

Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls

TRIS, TRB

Nov 30 1983 12:00AM

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