Structural and design concepts

Replies

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  anuraadha

  when a simply supported beam is acted upon by a concentrated load (W kN) at the centre and uniformly distributed load (w kN/m). the shear force and bending moment is as shown
  
• 

  anuraadha

  Sign conventions for a beam
  
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  CIVILPRINCESS

  for the cantilevered beams the loading conditions and the respective SFD and BMD
  
  
  
  
  
  
  
  
• 

  anuraadha

  Always the support reactions are determined by the equation of equilibrium
  sum of horizontal forces=0
  sum of vertical forces=0
  sum of moments= 0
• 

  maria flor

  What do you call the load in parabolic???
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  anuraadha

  I guess you are asking about the shape of beam. when a uniformly distributed load acts on a beam the resulting bending moment takes the shape of parabola.
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  maria flor

  nope. We have an exam..the load is already in parabolic and we need to draw the shear and moment diagram....
• 

  CIVILPRINCESS

  yeah there is a loading condition where the load is parabolic distributed.
  it has no other names it is just parabolic load
  
  
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  CIVILPRINCESS

  if we take the seismic load acting on the vertical face of dam or the forces due to waves they are all parabolically distributed. 😀
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  maria flor

  Ah..ok. but, how can I solve that kind of problem???? I never expect it to be on our exam in Strength of Materials.
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  CIVILPRINCESS

  well i've not solved a parabolic load too. 😔
  but i'll refer my books and let you know 😀
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  maria flor

  CIVILPRINCESS

  well i've not solved a parabolic load too. 😔
  but i'll refer my books and let you know 😀

  ok. I'll try to post the problem here.
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  CIVILPRINCESS

  maria flor

  ok. I'll try to post the problem here.

  yeah do that 😀
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  anuraadha

  The beam formulas under various loading conditions.
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  anuraadha

  statically indeterminate structure - It is a structure where the static equilibrium equations are insufficient for determining the internal forces and reactions on that structure.
  
  Statically determinate structure - [FONT=verdana, geneva, helvetica]It is a structure which can be fully analyzed using the static equilibrium equations.[/FONT] e.g : remove the support B in above figure.
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  khelagor

  Thanks Anuraadha!