Bending moments and points of contraflexure

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SUMMARY

This discussion focuses on calculating bending moments and identifying points of contraflexure in beam analysis. Participants emphasize the relationship between bending moments and shear forces, specifically how the derivative of the bending moment relates to shear force variation. The conversation highlights the need for clarity in solving parts d) and e) of a specific problem related to these concepts. Resources such as diagrams and online references are suggested for further understanding.

PREREQUISITES
  • Understanding of beam theory and mechanics of materials
  • Familiarity with shear force and bending moment diagrams
  • Knowledge of derivatives in calculus
  • Experience with structural analysis software (e.g., SAP2000 or STAAD.Pro)
NEXT STEPS
  • Research the relationship between shear force and bending moment using diagrams
  • Study the concept of points of contraflexure in beam structures
  • Learn how to derive bending moment equations from shear force equations
  • Explore structural analysis techniques using software like SAP2000
USEFUL FOR

Structural engineers, civil engineering students, and professionals involved in beam analysis and design will benefit from this discussion.

ai93
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Hi
I am attempting a question on moments and beams.
I have attached the question and my solutions so far. But having trouble completing d) and e)
Can someone show how to work out bending moments and the point of contraflexure?
http://[ATTACH=full]199767[/ATTACH] [ATTACH=full]199768[/ATTACH]
[ATTACH=full]199769[/ATTACH]

any help is appreciated thanks
 

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What have you done on part d so far. To you know how to determine the bending moment variation, given the shear force variation? How are the two related?

Chet
 
Having trouble doing bending moments and points of contraflexture. That's why I need help!
 

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