PROFIS ENGINEERING
Figure 6.3e. Figure 6.3f. Figure 6.3g.
Reference Figure 6.3e [ 63 ]. The resultant shear load( V res) is calculated using V x and V y. The distance“ x” corresponds to the eccentricity of V y with respect to the centroid of the anchor group. Reference Table 6.3 [ 61 ]. Using the net load V y, net acting on each anchor and the distance of each anchor in the +/- x direction from the centroid of the anchor group, the distance“ x” can be determined.
Reference Figure 6.3f [ 63 ]. ACI 318 provisions would calculate the value for“ x” as follows:
V y, 1 + V y, 5( − 12in *) + V y, 2 + V y, 6( − 4in *) + V y, 3 + V y, 7( + 4in *) + V y, 4 + V y, 8( + 12in *) = V y xin 2anchors −1686lb / anchor −12in + 2anchors −1229lb / anchor −4in + 2anchors −771lb / anchor + 4in + 2anchors −314lb / anchor + 12in = −8000lb x x = − 4.574in
* reference Figure 6.3d [ 62 ] for anchor geometry
Reference Figure 6.3g [ 63 ]. PROFIS Engineering conservatively assumes V res acts towards the y- edge in lieu of V y. Therefore, PROFIS Engineering calculations for“ x” are predicated on using V res in lieu of V y such that the value for“ x” is calculated as follows:
V y, 1 + V y, 5 −12in * + V y, 2 + V y, 6 −4in * + V y, 3 + V y, 7 + 4in * + V y, 4 + V y, 8 + 12in * = V res xin
2anchors 1686lb / anchor −12in + 2anchors 1229lb / anchor −4in + 2anchors 771lb / anchor + 4in + 2anchors 314lb / anchor + 12in = −8081lb x x = − 4.528in
* reference Figure 6.3d [ 62 ] for anchor geometry
“ x” corresponds to the shear load eccentricity parameter, which is designated e c, V in ACI 318. e c, V is used to calculate the modification 1 factor for shear eccentricity( ψ ec, V): ψ ec, V = 1 + e c, V
1.5c a1
ψec, V is used to calculate ϕVcbg, y: ϕV cbg, y = ϕ A Vc
A Vco ψ ec, V ψ ed, V ψ c, V ψ h, V V b PROFIS Engineering checks ϕV cbg, y ≥ V res
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