Maximum shear acting on a point

AI Thread Summary
The discussion centers on determining the maximum positive shear in a beam, specifically questioning why only three cases need to be considered. One participant argues that the maximum shear occurs at point B when a specific load acts on it, seeking clarification on whether this is correct. Another participant emphasizes that the problem is related to beam mechanics rather than soil mechanics, indicating a misunderstanding of the context. The conversation highlights the importance of understanding shear forces in structural analysis. Overall, the focus remains on the conditions under which maximum shear occurs in beams.
fonseh
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Homework Statement


Why we need to consider only 3 cases when we want to find the max positive shear ?

Homework Equations

The Attempt at a Solution


IMO , We know that the max shear will only occur when the 67.5kN act on B , am i right ? There is no need to consider 3 different cases ...Or my concept is incorrect ? If so , can anyone show me the example where the max shear will occur at B although the max concentrated load doesn't act on the particular point ?
 

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Update : Why the max shear will only occur at B when the certain load act on it ? Can someone explain about it ?
 
@Chestermiller , can you help ? I think you are the only one in this forum who knows soil mechanics
 
This is not a soil mechanics problem. It is a beam problem.
 
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Chestermiller said:
This is not a soil mechanics problem. It is a beam problem.
sorry , wrong thread
 

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