Code References
ACI 318-14
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The shear resistance of precast concrete components must meet the following requirement (22.5):
(eq. here)
('where:' list in word doc or here?)
where:
Vc = nominal shear strength provided by concrete
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For all beams (both prestressed and non-prestressed), the minimum shear strength is 2 * sqrt√(F’c).
Shear Area
The shear area is calculated based on the polygons which make up the cross section, which are used in place of the bd term in the equations for Vc. These polygons encompass only the area of the non-composite section. Some Some sections (typically the sections which consist of webs and top/bottom flanges), only the polygon which encompasses the web is used (and extending this polygon into the top and bottom flanges, if present). This polygon is extended into the topping if the composite shear resistance section option is selected by the user.
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When no transverse reinforcement has been defined, the amount of shear required to be resisted by shear reinforcement, Vs, is calculated by:
(eq)
The strength of the provided transverse reinforcement, when applicable, is computed by summing all of the zones the location overlaps with. Eriksson Beam computes the total transverse provided based on the transverse inputs and use in ACI 318-14 Eq. 22.5.10.5.3.
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The cross section limits are checking against ACI 318-14 22.5.1.2. If the limits fail and error will be displayed in the analysis report.
Shear Options (show here or in program operation?)
Options | Description |
|---|---|
Treat as slab | |
Limit shear per ACI 318-14 9.4.3.2 | |
Composite Behavior |
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PCI Industry Handbook Committee, PCI Design Handbook, 8th Ed., PCI, Chicago, 2017.
(still need to add keywords)