Maximum shear acting on a point

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Discussion Overview

The discussion revolves around the determination of maximum shear forces in a structural context, specifically questioning the necessity of considering multiple cases when identifying the maximum positive shear at a point, particularly point B, under a given load.

Discussion Character

  • Homework-related
  • Debate/contested

Main Points Raised

  • One participant questions why only three cases are considered for finding the maximum positive shear, suggesting that maximum shear occurs only when a specific load acts on point B.
  • Another participant seeks clarification on why maximum shear is asserted to occur at point B under certain loading conditions.
  • A request for assistance is made to a specific participant, indicating a belief that they possess relevant expertise in the topic.
  • Some participants clarify that the problem pertains to beam mechanics rather than soil mechanics, indicating a potential misunderstanding of the problem's context.

Areas of Agreement / Disagreement

There appears to be disagreement regarding the necessity of considering multiple cases for maximum shear determination, as well as confusion about the problem's classification (beam vs. soil mechanics).

Contextual Notes

Participants have not resolved the assumptions regarding the conditions under which maximum shear occurs, nor have they clarified the implications of different loading scenarios on shear force calculations.

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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