PROFIS ENGINEERING
Figure 6.4d.
Reference
Figure 6.4d [ 69 ]. For this example, PROFIS Engineering would assume V res acts towards the y- fixed edge. When considering concrete breakout with respect to the y- fixed edge, ACI 318 Case 1 / Case 2 provisions are relevant for the anchorage geometry shown in Figure 6.4d [ 69 ]. ϕV cbg, y is calculated for row 1 and row 2.
ϕV cbg, y = ϕ A Vc
A Vco ψ ec, V ψ ed, V ψ c, V ψ h, V V b where: ϕV cbg, y, row 1 is calculated using c a1, row 1 = 8 in( reference Figure 6.4d [ 69 ]) ϕV cbg, y, row 2 is calculated using c a1, row 2 = 18 in( reference Figure 6.4d [ 69 ]) Per Case 1 / Case 2, V res is assumed to be distributed proportionately among each row: V res, row 1 = 0.5 V res and V res, row 2 = 1.0 V res
MAX {( V res, row 1 / ϕV cbg, y, row 1):( V res, row 2 / ϕV cbg, y, row 2)} controls the design with respect to concrete breakout in shear.
Design Examples
Design Examples( page 69) provides design examples for the various conditions discussed in ACI 318 Provisions for Shear Acting on Multiple Rows or Columns( page 2) through Shear Load Evaluation( page 45). Calculations are performed per the ACI 318-19 anchoring-to-concrete provisions given in Chapter 17. Both tension calculations and shear calculations are performed.
The shear concrete breakout calculations in the design examples are predicated on ACI 318-19 Section 17.7.2 Concrete breakout strength of anchors in shear but extrapolated for anchorages consisting of multiple anchor rows / columns with multiple anchors in each row / column. Shear load design assumptions for these examples correspond to the information given in Shear Load Evaluation( page 45) of this design guide.
The examples will also note any parameters, nomenclature and design assumptions specific to PROFIS Engineering; including the following:
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