Definition of beams and Beam types

RCC Beam design

Definition of beams and Beam types

Definition of Beam:

Beams are the horizontal parts of the structures which transfer the dead and live loads to the vertical members of the structures.The beams are subjected to bending.On any section of the beam bending causes compressive as well as tensile stresses.

Types of Beams:

a) Simply Supported Beams:

Definition of beams and Beam types

These are the beams which simply rest on the walls or on columns.
In this beam the bending causes tension on the bottom side.Thus to overcome the bending the reinforcement is given on tension side.Beams may be singly reinforced or doubly reinforced. In case of singly reinforced beams,the main reinforcement is provided near the face of the beam subjected to tension.While in case of doubly reinforced beams,main reinforcement is essentially provided on the face of the beam subjected to tension and compression.

b) Fixed Beam:

Definition of beams and Beam types

fixed beam and deflected shape

In this type of beams both the ends of the beam are fixed or embedded in walls. Loading procedures reactions and moments over supports of this type.

c) Cantilever Beam:

Definition of beams and Beam types

cantilever beam and deflected shape


In this type of beam,its one end is free without support and one end, is fixed. This type of beam have tension zone in topside and compression zone in the bottom side.

d) Continuous Beam:

Definition of beams and Beam types

continuous beam

This type of beam is laid on more then two supports as shown in figure.

 

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