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In the Building Design Suite of AEC|BOLT, the reinforcement of slabs is accomplished through the generation of three design rectangles:
Reinforcement Intensity Rectangle (yellow)
Rebar Distribution Rectangle (white)
Rebar Length Rectangle (dark blue)
1.Reinforcement Intensity Rectangle on Columns
Reinforcement The calculation of reinforcement demand is calculated according to determined based on the reinforcement intensity rectangle. To find determine the width of the yellow intensity rectangle in a certain specific direction,
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Measure the linear center-to-center distance of between the columns connected with stress lines in the desired direction.
Measure the linear center-to-center distance of between the columns connected with stress lines in the adjacent directions25% of the shortest distance is the .
The distance between the center of the column and the yellow rectangle in the desired direction is 25% of the shortest distance measured.
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For example ;
Min (166.125”,281”,315.50”) = 166.125”
0.25*(166.125”) = 41.53125”
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→ Average intensity = 4.4365/6.5729=0.67496
Rebar decision
Column Strip Top Rebar Decision
Rebar diameter and spacing is being decided from table according to the determined intensity.
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Note : Column top rebar can not be less than minimum required rebar.
Middle Strip Top Rebar Decision
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Reinforcement intensity for the span between two columns is the maximum strip value between the intensity rectangles of two columns.
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Note : Maximum Rebar Spacing = min(2*Slab Thickness , 18”)
2) Rebar Distribution Rectangle
Top slab reinforcement is being distributed in certain areas. Distribution rectangle indicates in which area the reinforcement will be distributed. And the number of rebar is calculated according to this rectangle.
Distribution rectangle is drawn as follows;→
Measure the linear center to center distance of columns connected with stress lines.
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For direction1, positive direction width is 0.25*max(positive direction length, negative direction length)
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For direction1, negative direction width is 0.25*max(positive direction length, negative direction length)
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For direction2, positive direction width is 0.25*max(positive direction length, negative direction length)
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For direction2, negative direction width is 0.25*max(positive direction length, negative direction length)
Distribution rectangle must be symmetrical.
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→ Number of rebar is not specified for middle strip.
Reinforcement Condition of Columns Linked by Beams
In cases where beam and column are connected, the aim is to meet the reinforcement needs in the direction parellel to the beam from the beam reinforcement. The method we set is as follows;
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→ Reinforcement perpendicular to beam direction is required in both conditions.
Kalan kısmı eklenecek
3)
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Rebar Length Rectangle
Reinforcement Rebar length is equal to navy blue rectangle width of desired direction.
Column Top Rebar Length
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Navy blue rectangle is drawn as follows ;
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Note : If slab edge is rotated, 0.3*measured maximum distance must be equal or greater than the distance from column face to slab edge.
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Middle Strip Reinforcement Length
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Middle strip reinforcements are generated between columns connected with stresslines.For example, determining the reinforcement length of the middle strip region indicated with white circle is as follows;→
Determine the columns that are associated in parallel to middle strip reinforcement with the two end columns of stress line.
→ C9-C54 columns are associated with C53 column and C10-C56 columns are associated with C55.→
Measure the linear clear distance from end columns of stress line to associated columns
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Measure the maximum column width parallel to reinforcement of two end columns.
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Sum the half of maximum width with 0.22*maximum distance
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Draw lines at calculated distance perpendicular to the reinforcement direction and parallel to stress line.
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The lines must extend to the column distribution rectangles at both ends.
The middle strip rebars are placed in this region.
For example;
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→ Maximum clear distance = 291.50”
→ Maximum end column width parallel to rebar direction = 24”
→ Half width of middle strip rectangle = 24/2+0.22*291.50=Eklenecek76.1234”
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If middle strip rectangle is near to slab edge;
→ Inner half of rectangle( distance from stress line) will be calculated as explained above
→ Outer half will end at slab edge
→ Reinforcement length will be shorter than two times of calculated value.
Merge Column Reinforcements
2 Columns Combine
If navy blue (length) rectangles of two columns intersect, column rebars must be merged.
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3 Columns Combine
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If three navy blue (length) rectangles of columns intersect, determine the critical rebar. Then measure the longest width of length rectangles and place the reinforcement. The number of reinforcement is not specified but the direction of the reinforcement must be specified in the drawing.
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Merge Middle Strip Reinforcements
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If two or more middle strip rectangles intersect, user must merge reinforcements manually.
Merge middle strip reinforcement kısmı yeni konsept üzerinde uygunluğu belirlendikten sonra güncellenecek.