Help with Bending Moment Diagrams

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SUMMARY

This discussion focuses on understanding bending moment diagrams and shear force diagrams in structural analysis. The user seeks assistance with a specific problem involving a beam in equilibrium, where reactionary forces are not provided. Key principles highlighted include the equilibrium conditions: the sum of vertical forces must equal zero, and the sum of moments about any point must also equal zero. The advice given emphasizes summing moments about one end of the beam to find the unknown reaction force.

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  • Understanding of basic structural analysis concepts
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  • Knowledge of equilibrium conditions in mechanics
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Bending moments Help!

Hi guys, didnt really know how the layout of a bending moment diagram would fit under the standard template provided so i'll have a bash at explaining the problem.

On my school course i have been doing bending moments/diagrams and shear force diagrams, but a few days ago we were given a new type of question without the reactionary forces provided and as i had an urgent dentist appointment i missed the lesson...we are not off college for 2 weeks and i was wondering if you could be of some help if i posted an image of the question - thus giving me a better idea and understanding of how to answer the question.

i have attached the image of it.

thanks.
 

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For a beam in equilibrium,
- the sum of all forces in the y direction must equal zero
- the sum of all forces in the x direction must equal zero, which is not required for this problem
- the sum of all moments about any point must equal zero

Try summing moments about one end, to determine the reaction at the other end. Please show an attempt at your work.
 

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