Types of Beams, Shear Force & Bending Moment Diagram

When a beam is subjected to uneven load, beam undergoes bending producing bending moment which in turn produces stresses within the beam. Therefore, it is necessary to calculate the bending moment and shear stress developing within the beam when subjected to any type of load.

A beam is a horizontal member of a structure, which distributes the overall load of the building. Different types of beams are:

  • Simply supported beam
  • Fixed beam
  • Over hanging beam
  • Double overhanging beam
  • Continuous beam
  • Cantilever beam
  • Trussed beam

Different types of loads which might come into action are:

  • Dead load
  • Live load
  • Wind load
  • Snow load
  • Earthquake load
  • Thermal load
  • Settlement load
  • Dynamic load

Preparing Bending Moment Diagrams (BMD) and Shear Force Diagram (SFD), gives idea about the internal stresses and bending developed in structure to counter the deformation due to loading. Hence, while designing a beam of concrete we find the points of maximum SFD and BMD values. These values in turn give us the idea as to the kind of material and geometry we need to provide to resist deformation or failure in general.

The Video uploaded by Learn Engineering, explain the calculation of BMD & SFD along with detailed procedure for preparing their diagrams.

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