Concrete Beam-Column Joint Shear Design per ACI 318-19 §15, §18.8
ideCAD automatically designs reinforced concrete beam-column joints Shear in accordance with ACI 318-19.
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Notation
h = overall thickness, height, or depth of the member.
ideCAD checks the beam-column joint shear limits according to ACI 318-19 Chapter 15
The joint shear design should consider the shear resulting from the moment created by gravity load, wind, earthquake, or other lateral forces at beam-column joints.
According to ACI 15.2.6, if a column extension provides continuity through a beam-column joint in the direction of joint shear, it considered shall satisfy the following two conditions:
The column extends above the joint at least one column depth, h, measured in the direction of the joint shear considered.
Longitudinal and transverse reinforcement from the column below the joint is continued through the extension.
According to ACI 15.2.7, if a beam extension provides continuity through a beam-column joint in the direction of joint shear, it considered shall satisfy the following two conditions:
The beam extends at least one beam depth h beyond the joint face.
Longitudinal and transverse reinforcement from the beam on the opposite side of the joint is continued through the extension.
According to ACI 15.2.8, for a beam-column joint to be considered confined for the direction of joint shear, two transverse beams should be satisfied the following three conditions:
The width of each transverse beam is at least three-quarters of the width of the column face into which the beam frames.
Transverse beams extend at least one beam depth h beyond the joint faces.
Transverse beams contain at least two continuous top and bottom bars satisfying ACI 9.6.1.2 and No. 3 or more oversized stirrups satisfying ACI 9.6.3.4 and 9.7.6.2.2.
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