How does ideCAD control beam reinforcement limits according to ACI 318-19?
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In other words, if ϕλ√fc‘(bwd) < Vu < [ Vc + 8√fc‘(bwd) ], the minimum shear reinforcement area, Av,min, is calculated given below.
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Minimum torsional reinforcement
If Tu < ϕTth, torsional effects is are ignored.
If ϕTcr > Tu ≥ ϕTth, only minimum torsional reinforcement needs to be provided given below;
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the minimum area of longitudinal reinforcement Al,min
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Reinforcement Limits for Beams of Earthquake-Resistant Structures
Ordinary moment frames
All the conditions and calculations , described above are valid for beams of ordinary moment frames.
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All the conditions and calculations , described above are valid for beams of intermediate moment frames.
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All the conditions and calculations , described above are valid for beams of special moment frames.
According to ACI 18.6.3.1; Longitudinal reinforcement should be satisfied the conditions given below;
Beams should have a minimum of two continuous bars at the top and bottom faces.
The reinforcement ratio ρ shall not exceed 0.025 for Grade 60 or S420 reinforcement and 0.02 for Grade 80 reinforcement.
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