How Safe are Our Large Reinforced Concrete Beams?


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Title: How Safe are Our Large Reinforced Concrete Beams?

Author(s): G. N. J. Kani

Publication: Journal Proceedings

Volume: 64

Issue: 3

Appears on pages(s): 128-141

Keywords: beams (structural); cracking (fracturing); deep beams; depth; diagonal tension; reinforced concrete; research; safety factor; shear strength.

Date: 3/1/1967

To answer this question, four series of test beams, with depths of 6, 12, 24, and 48 in., were tested at the University of Toronto and the results compared. Considerable influence of the absolute depth became apparent to such an extent that the safety factor for the largest beams was approximately 40 percent lower than the otherwise similar small beams. This trend indicates that, with a further increase in depth, a correspondingly further decrease in the safety factor can be expected.