Is small reinforcement diameter and ample support reinforcement suitable in the beam?

[ganymede]

Mounting reinforcement for beams size 25/60 2Q12. When I make the reinforcement diameter Q14 for the assemblies, the support reinforcements are reduced and my quantity is not affected much. I would like to get your opinion on which one I should choose. Frankly, the 2Q12 reinforcement in 60' beams is also rare for me. In the past, I heard from one of our instructors that it would be very beneficial to have the same number and diameters of the upper and lower reinforcement in the beam, as it increases ductility. Small reinforcement diameter in the beam, abundant support reinforcement; Or is large reinforcement diameter less support reinforcement better? Apart from this, I would like to learn your valuable ideas about beam reinforcement design that you think will be useful. Thanks in advance.

 

[sereze]

Re: Small reinforcement diameter in beam and ample support reinforcement is appropriate It is true that the lower and upper reinforcements are the same, increasing ductility. It is also nice that there is no reinforcement on the support, the less reinforcement types, the easier the workmanship.

 

[sereze]

Re: Small reinforcement diameter in beam is suitable for ample support reinforcement In addition, the beam reinforcement being equal at the bottom and at the top prevents the occurrence of unexpected moments in the section under the influence of axial load, in strain shrinkage, elongation and shortening due to temperature. Features I've heard that 8-9 meter beams have cracked beams due to this issue.