CRANKED BAR/ BENT UP BAR USES & DIMENSIONS IN MALAYALAM 

#reinforcement#bent up bar#cranked bar#reinforcement detail#bar bending schedule# Malayalam#
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CIVIL ENGINEERING MALAYALAM
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4. CRANKED BAR/ BENT UP BAR USES & DIMENSIONS IN MALAYALAM:-
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CRANKED BAR / BENT UP BAR:
A bent-up bar called as crank bar is provided to make RCC slab safe from compressive stresses. When bent up bars are provided, the strength and deformation capacity of slabs with bent up bars compared to slabs without bent up bars is sufficiently increased.
Generally in the fixed R.C.C ended Slabs, means column at the ends of the supports. Those slabs face Two types of moments develop which are called.
1. The positive moment which called (Sagging) develop at mid of the span.
2. The negative moment which called (Hogging) develop at the supports.
Crank bars or bent up bars are provided in a slab due to the following reasons :
1. To resist positive bending moment or sagging BM at the mid span. This is done by the bottom reinforcement provided in a slab.
2. To resist negative bending moment or hogging BM at the support of the slab. This is done by the top reinforcement provided in a slab.
3. To resist the shear force which is greater at the supports.
4. To reduce the risk of a brittle failure of slab- column connection.
5. To reduce the amount of steel used.
6. For the economization of materials.
Bars are bent near the supports at an angle of 45° and having length 0.42 D (D is the c/c distance from top & bottom reinforcement). Crank distance is L/5 from intermediate support and L/7 from end support.
Query solved:
1. what is bent up bar?
2. what is cranked bar?
3. where is cranked bar used?
4. where is bent up bar used?
5. uses of bent up bar?
6. uses of cranked bar?
7. distance of cranked bar?
8. distance of bent up bar?
9. equation for cranked bar?
10. equation for bent up bar?
11. why cranked bar use in slab?
12. what is the reason for bent up bar used in slab?
13. what is the reason for cranked bar used in beam?
14. what is the reason for bent up bar used in slab?
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