CRANK BAR:-
A Bent -up bar is called Crank bar. Crank bar is provide to make R.C.C slab safe from compressive stress. When bent-up bar is provide in the slab then strength and deformation capacity is increase as compare to without bent-up bar slab.
In the above image . you can see that how crank bar is provide in the slab.
The slab is supported at two ends . In the slab two moment is act .The maximum tensile stress that is positive moment (SAGGING). This act in the middle span of slab and maximum compressive stress that is negative moment(HOGGING). This act in the edge of slab or this act at the supports. The crank bar in which angle is 45° and also be 30° .
PURPOSE OF CRANK BAR
1. To Prevent negative bending moment (Hogging).
2. To resist shear force which is higher at support of slab.
3. To reduce the risk of brittle failure of slab - column join.
4. To make the structure economic by reduceing the amount of steel.
Title :
WHY PROVIDE CRANK BAR IN THE SLAB?
Description : CRANK BAR:- A Bent -up bar is called Crank bar. Crank bar is provide to make R.C.C slab safe from compressive stress. When bent-up bar i...
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