what is singly reinforcement || what is doubly reinforcement Engineer Bipin
what is singly reinforcement || what is doubly reinforcement Engineer Bipin
The beam that is longitudinally reinforced only in tension zone, it is known as a singly reinforced beam. In Such beams, the ultimate bending moment and the tension due to bending are carried by the reinforcement, while the compression is carried by the concrete.
But it is not possible to provide reinforcement only in the tension zone, because we need to tie the stirrups. Therefore, two rebars are used in the compression zone to tie the stirrups, and the rebars act as false members only to hold the stirrups.
The doubly reinforced beams have compression reinforcement in addition to the tension reinforcement, and this compression reinforcement can be on both sides of the beam (top or bottom face), depending on the type of beam, that is, simply supported or cantilever, respectively.
The beam that is reinforced with steel in the tension and compression zone is known as the doubly reinforced beam. This type of beam is provided mainly when the depth of the beam is restricted. If a beam with limited depth is reinforced only on the tension side, it may not be strong enough to withstand the bending moment
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