In this article, we have covered the difference between Singly Reinforced Beam and Doubly Reinforced Beam based on reinforcement in tension and compression zones of the RCC beam.
Singly reinforced beam and double reinforced beam are two common types of reinforced concrete beams widely used in construction. These beams resist bending and shear forces to support loads. In singly reinforced beams, engineers only reinforce the tension side of the beam with steel bars. Conversely, in double reinforced beams, both the tension and compression sides are reinforced with steel bars. The amount and location of the reinforcement determine the load-bearing capacity and performance of the beam. Engineers and builders must understand the differences between singly and double reinforced beams to select the appropriate beam for a construction project.
In the Reinforced Concrete (RCC) beam, there is two way to provide reinforcement.
- Reinforcement in the tension zone.
- Reinforcement in both tension and compression zones.
Table of Contents
Singly Reinforced Beam:
The beam which is longitudinally reinforced only in the tension zone is known as a singly reinforced beam. In this type of beam, the ultimate bending moment and tension are transferred by the reinforcement. The compressive force is transferred by concrete.
Basically, it is absurd to expect to give fortification just in the strain zone, since we have to tie the stirrups. Consequently, two rebars are used in the pressure zone to tie the stirrups and the rebars go about as bogus individuals only for holding the stirrups.
Doubly Reinforced Beam:
The beam which is reinforced in both tension and compression zone is known as a doubly reinforced beam. This kind of beam is chiefly provided when the depth of the beam is limited. When the beam with restricted depth is reinforced on the tension zone only, it might not have adequate resistance to oppose the bending moment.
The moment of resistance can not be expanded by increasing the amount of steel in the tension zone. It can be expanded by making the beam over-reinforced but not more than 25% on the strained side. Consequently, a doubly reinforced beam is provided to increase the moment of resistance of a beam having restricted dimensions.
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