WHY
STRAIGHT AND CRANKED BARS PROVIDED IN THE SLAB
Figure
shows the straight and cranked bars
We have already studied that load act on the slab
will be at the centre of the slab
In the slab deflection is high in the shorter span.
In order to transfer that the bending moment developed
at bottom of the slab, main reinforcement is provided.
The main purpose of the main bars is to transfer the
bending moment developed at the bottom and ends of slab to the columns.
In main reinforcement there are two types of baras
1. Cranked bars
2. Straight bars
1.
Function of the cranked bars
Cranked bars transfer the negative
bending moment developed at the ends of the slab. The bellow figure shows the
negative bending moment developed at the ends of the slab.
2.
Function of the straight bars
Straight bars transfer the
positive bending moment developed at the centre of the slab. The bellow figure
shows the positive bending moment developed at the ends of the slab.
No comments:
Post a Comment