Laboratory Measurements of Stress Distribution in Reinforcing Steel

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Title: Laboratory Measurements of Stress Distribution in Reinforcing Steel

Author(s): Douglas McHenry and W. T. Walker

Publication: Journal Proceedings

Volume: 44

Issue: 6

Appears on pages(s): 1041-1054

Keywords: none

Date: 6/1/1948

Abstract:
The SR-4 strain gage, an electrical device somewhat smaller than a postage stamp and scarcely any thicker, has been used successfully to measure stresses in reinforcing steel embedded in concrete. The paper gives typical laboratory test results on the stress distribution along the steel of simple reinforced beams before and after cracking, and compares these results with the stresses computed by conventional methods. Attention is called to some of the many possible applications of this gaging method as well as to its limitations. The method of attaching and waterproofing the gages is described in an appendix.