Are there any four situations in which the doubly reinforced beams are used?
- Er. Abhishek Singh
- Apr 28, 2018
- 1 min read
When beam size is restricted for some architectural reasons or other reasons.
When beam size is not restricted (It's not feasible to provide 2m deep beam, just because size isn't restricted, It may create lots of problems during placing of r/f and concrete)
In Industrial building, some sections of a continuous beam with moving loads undergo change of sign of the bending moment which makes compression zone as tension zone or vice versa. Thus compression r/f is provided to resist such loads.
The ductility requirement has to be followed.(in some cases the given beam might not be ductile enough even if it safely carries the load, so we provide compression r/f to add ductility)
The reduction of long term deflection is needed. (Again in some cases it might be possible that section is safe and ductile enough, but it may undergo some great deflection in the long run i.e. creep, in such cases we provide top r/f to avoid excessive creep.
