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Strength Effect of Cutting Off Tension Bars in Concrete Beams
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1967-06-01
[PDF-1.20 MB]
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Abstract:Sixty-four concrete beams reinforced with #8 or #11 bars (largely A432) were tested as simple beams. Most of these had bars cut off at the minimum point for moment or at 12D or 15D beyond such points. Some, for comparison, contained full length bars or bars bent up. The majority of the beams with bars cut off were designed to be balanced at ultimate in flexural strength, shear strength, and bond strength. With bars cut off and no remedial steps, only 2 beams out of 33 developed the design ultimate strength. The losses ranged in the order of 15 to 25 percent, with one more than 40 percent. With bars bent up no deficiencies occurred.
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