Boundary Regions Reinforcement Detiling Conditions.

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Last updated: Oct 21, 2022 by Zeynep Aladağ
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  • The ratio of the total vertical reinforcement area in each of the polygon wall end zones along the critical wall height is at least 0.002 to the gross cross-section area of ​​the polygon wall arm, except for this height, this ratio is automatically selected not less than 0.001.

  • The conditions that the longitudinal reinforcement amount should not be less than 4ϕ14 in each of the polygon wall end regions and the minimum longitudinal reinforcement ratio in the polygon wall end regions is 0.03 (0.06 in the overlap zone) are automatically applied.

  • The diameter of the transverse reinforcement to be used in the end regions is not taken less than 8 mm. And the stirrup arms and / or horizontal spacing between crossties, a , greater than the diameter of hoops and crossties 25 of the solid is not selected.

ICONS

ϕ = Rebar diameter

Reinforcement Conditions in Polygon Wall End Regions

In polygon wall end zones, the ratio of the total vertical reinforcement area of ​​each polygon wall end zone along the critical wall height defined in 7.6.2.2 in accordance with Article 7.6.5.1 of TBDY is arranged to be at least 0.002. Except for the critical curtain height , this ratio is arranged so that it is not less than 0.001. The longitudinal reinforcement ratio in the polygon wall end regions is arranged to be at most 0.03 (0.06 in the overlapping area). At the same time, the amount of longitudinal reinforcement in the wall end regions is arranged not to be less than 4ϕ14.

The Curtain Parameters table of the Curtain Group Preliminary Information report is shown in the following picture . In this report, minimum longitudinal reinforcement ratio values ​​for wall end zone specified in 7.6.5.1 are shown.

Conditions mentioned in 7.6.5.1 in polygon wall end zones are given in Figure 7.11 of TBDY .

Vertical reinforcements at the polygon wall end zones are wrapped in accordance with the following rules with transverse reinforcements consisting of stirrups and / or crossties in accordance with Article 7.6.5.2 of TBDY .

  • Transverse reinforcement diameter is taken as minimum 8 mm in the end regions. The horizontal distance between the stirrup sleeves and crossties is taken less than 25 times the diameter of the stirrup and crotch.

  • The critical wall height for the confinement of the column of wall end of the polygon along 7.3.4.1 from Eq. (7.1) "in the second condition and the determined at least transverse reinforcement 2/3 should be placed. This condition is controlled by the user.

  • In the vertical direction, the stirrup and / or tie-dye spacing is not taken larger than 150 mm and smaller than 50 mm.

  • In the vertical direction, the stirrup and / or crotch spacing is not taken more than 6 times the diameter of the reinforcement and 1/3 of the wall thickness.

  • The transverse reinforcements in the polygon wall end zone are continued in the foundation along a height not less than 300 mm and wall thickness.

  • The stirrups and / or trousers spacing in vertical direction in the wall end regions outside the critical wall height shall not be taken larger than the wall thickness and 200 mm.

An example of a polygon wall drawing created in accordance with TBDY Section 7.6.5 along the critical wall height is shown in the picture below.

Similarly, the example of polygon shear drawing created in accordance with TBDY Section 7.6.5 in the upper part of the critical wall height is shown in the picture below.