Recent Updates

Wednesday, 22 March 2017

EXPLAIN DIFFERENT TYPES OF BEAMS IN STRENGTH OF MATERIALS

We were discussing meaning and importance of shear force and bending moment and also some basic concepts of strength of materials in our recent posts. Today we will see here the types of beams in strength of materials with the help of this post.

Types of beams

First we must have to understand here the meaning and definition of a beam and after that we will see here the various types of beams with the help of this post. 

A beam is basically defined as one structural member used to bear the different loads. In structure, beam helps to bear the load and we must have to note it here that there will not be any structure without beams and therefore we must have to understand the various types of beams in strength of materials.

Beam is usually subjected with vertical load, shear load and also sometimes with horizontal load. We must have to note it here that cross section of a beam will be quite smaller as compared to its length.

Let us see here the various types of beams in strength of materials according to the types of supports

Simply supported beam

Simply supported beam is basically defined as a beam which is resting or supported freely on the supports at its both ends. Following figure displayed here indicates the simply supported beam AB and which is having length L.
As we can see here that both ends of beam is supported freely on the supports A and B respectively.

Cantilever beam

Cantilever beam is basically defined as a beam where one end of beam will be fixed and other end of beam will be free. Following figure, displayed here, indicates the cantilever beam AB with length L.
As we can see here that beam AB is fixed at one end i.e. at end A and free at other end i.e. at end B and therefore above beam will be termed as cantilever beam.

Fixed beam

Fixed beam is basically defined as a beam where both ends of beam will be fixed or built in wall. Such type of beam will also be called as encastred beam or built-in beam. There will not be any rotation or moment in such type of beams. There will also no vertical movement in such type of beams.

Following figure, displayed here, indicates the fixed beam AB with length L.
As we can see here that beam AB is fixed at its both ends i.e. one end is fixed at end A and other end is also fixed at end B and therefore above beam will be termed as fixed beam because both ends of this beam are fixed here.

Overhanging beam

Overhanging beam is basically defined as a beam where end portion of beam is extended beyond the supports. In such types of beams, one end or also both ends of the beam might be extended beyond the supports.

Overhanging beam could also be considered as the combination of simply supported beam and cantilever beam and therefore such type of beam will have heritage characteristics of simply supported beam and cantilever beam.

As we can see here that beam AB with length L is supported at two ends i.e. at end A and at end C or we can also say that beam is supported up to a length of X but Y portion of the beam is hanging and such type of beam will be termed as overhanging beam.

Continuous beam

Continuous beam is basically defined as the beam where more than two supports will be used and therefore we can also say that continuous beam is very similar with simply supported beam except one variation that here in case of continuous beam, there will be more than two supports and we have also displayed here in following figure for easy understanding of continuous beam.

Let us see here the various types of beams in strength of materials according to cross-section

I-Beam: I cross section
T-Beam: T cross section
H-Beam: H cross section

Let us see here the various types of beams in strength of materials according to geometry of the beam

Straight beam: Such beam will have straight profile
Curved beam: Such beam will have curved profile
Tapered beam: Such beam will have tapered cross-section

Let us see here the various types of beams in strength of materials according to equilibrium condition

Statically determinate beam: could be analyzed with the basic equations of equilibrium
Statically interdeterminate beam: could not be analyzed with the basic equations of equilibrium

Do you have any suggestions? Please write in comment box

Reference:

Strength of material, By R. K. Bansal

No comments:

Post a Comment