The boundary elements, whether regular or hidden, are reinforced based on the rules which are assigned to columns.
For reinforcing of the wall body, there are two parallel grates (known as curtains) one at each face. They are retained collectively through an ‘S’-shaped vertical bar. The vertical and horizontal grate rebars should contain a diameter at least identical to Ø8 .The reinforcement with “S” shape must be higher or equivalent to 4Φ8/m2
To avoid cracked surfaces e.g. in pool sides, narrow spaced grates should be applied having the lower possible rebar diameter.
To avoid cracked surfaces e.g. in pool sides, narrow spaced grates should be applied having the lower possible rebar diameter.
The ‘S’- shaped reinforcement
The ‘S’-shaped bar offers anti-buckling restraint to the longitudinal reinforcement. Besides, it makes sure that the vertical and the horizontal rebars will progress work jointly regardless of a potential concrete spalling that may occur due to an strong earthquake.
The ‘S’-shaped link is developed with one closed corner at an angle similar to 180°, or 135° and the other corner bent at an angle equivalent to 90°. This is crucial for positioning it without any difficulty. Once it is applied, the second corner must be also bent at an angle at least equivalent to 135°.
It is acceptable to apply soft steel to have the ability to bent the ‘S’-shaped reinforcement manually.
If the vertical rebars are positoned in an interior layer, then the ‘S’-shaped link must detain the horizontal rebars to the region that they bisect with the vertical ones or get around both horizontal and vertical rebars simultaneously.
On the other hand, in an rectangular shear wall, the reinforcement of the boundary column and the distribution rebars of the wall’s body is carried out as two ‘Γ’ shaped parts. Folded mesh is applied to develop the ‘Γ’ shaped parts.
Ref : debug.pi.gr
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| Image Courtesy - debug.pi.gr |
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Published By
Rajib Dey
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