PROFIS ENGINEERING
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row 1: V cbg, row1 = A vc, row 1 ψ
A ec, V ψ ed, V ψ c, V ψ h, V ψ parallel, V V b vc0 A Vc, row 1 =( 1.5c a1, row 1 + s x12 + s x23 + 1.5c a1, row 1) * MIN { 1.5c a1, row 1; h concrete } Assume 1.5c a1, row 1 controls for projected distance down from surface.
• row 2: V cbg, row 2 = A vc, row 2 ψ
A ec, V ψ ed, V ψ c, V ψ h, V ψ parallel, V V b vc0 A Vc, row 2 =( 1.5c a1, row 2 + s x12 + s x23 + 1.5c a1, row 2) * MIN { 1.5c a1, row 2; h concrete } Assume 1.5c a1, row 2 controls for projected distance down from surface.
• row 3: V cbg, row 3 = A vc, row 3 ψ
A ec, V ψ ed, V ψ c, V ψ h, V ψ parallel, V V b vc0 A Vc, row 3 =( 1.5c a1, row 3 + s x12 + s x23 + 1.5c a1, row 3) * MIN { 1.5c a1, row 3; h concrete } Assume h concrete controls for projected distance down from surface.
• row 4: V cbg, row 4 = A vc, row 4 ψ
A ec, V ψ ed, V ψ c, V ψ h, V ψ parallel, V V b vc0 A Vc, row 4 =( 1.5c a1, row 4 + s x12 + s x23 + 1.5c a1, row 4) * MIN { 1.5c a1, row 4; h concrete } Assume h concrete controls for projected distance down from surface
• Check the design concrete breakout strength for each row( ϕV cbg, row n) versus the factored load acting on each row( V ua, row n).
• row 1: design is satisfied if( V ua, row 1 / ϕV cbg, row 1) ≤ 1.0 where V ua, row 1 = 0.25V ua
• row 2: design is satisfied if( V ua, row 2 / ϕV cbg, row 2) ≤ 1.0 where V ua, row 2 = 0.50V ua
• row 3: design is satisfied if( V ua, row 3 / ϕV cbg, row 3) ≤ 1.0 where V ua, row 3 = 0.75V ua
• row 4: design is satisfied if( V ua, row 4 / ϕV cbg, row 4) ≤ 1.0 where V ua, row 4 = 1.0V ua
• MAX {( V ua, row 1 / ϕV cbg, row 1);( V ua, row 2 / ϕV cbg, row 2);( V ua, row 3 / ϕV cbg, row 3);( V ua, row 4 / ϕV cbg, row 4)} controls the design for concrete breakout in shear.
Unequal Number of Anchors and Unequal Spacing
Figure 4.3.
Reference Figure 4.3 [ 15 ]. It illustrates a hypothetical anchorage consisting of eight anchors, which are installed around the perimeter of the plate. The shear load( V ua) acts towards the y- edge, so shear concrete breakout will be calculated with respect to the potential failure surface that can develop from any row being considered. Considering the anchor layout with respect to rows: row 1 and row 3 each consist of three anchors, while row 2 consists of two anchors. Assume V ua acts on all three rows.
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