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This section provides a calculator to estimate the strength of rectangular
section of a
reinforced concrete beam (singly or doubly reinforced).
You can use this
calculator for either
Inch-Pound/FPS (north American) or
SI/Metric
systems of units.
The following assumptions as per ACI
(American Concrete Institute) are adopted in developing the
Calculator for the strength of RC beam:
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Ultimate compressive strain in
concrete is equal to 0.003.
-
Tensile strength of concrete is
ignored.
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Strain varies linearly over the
depth of the cross section.
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Steel stress varies linearly
until yielding and remains constant beyond yielding.
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Compressive force in the
concrete is determined from Whitney's equivalent stress block.
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