Angle of rotation in fixed end of beam

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The discussion revolves around the confusion regarding the angle of rotation at the fixed end of a beam when subjected to different support conditions. Participants question why the fixed end moment is considered zero when the far end is pinned or roller supported, while in cases with both ends fixed, the angle of rotation is stated to be zero. There is a debate about whether the fixed end can resist shear forces and moments, implying that some angle of rotation should exist. Additionally, issues with the clarity of uploaded images hinder effective communication and problem-solving. The thread emphasizes the need for clearer visuals to facilitate better understanding of the mechanics involved.
fonseh
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Homework Statement


In the first photo , i was told that the fixed end moment is zero when the far end is pinned or roller supported . Why in the example in the second and third photo( both end are fixed) , the angle is zero ?

Homework Equations

The Attempt at a Solution


I think it's wrong , because the fixed end must be able to resist shear force . In conjugate beam method , angle of rotation = shear force . So , as the fixed end can resist the moment , there must be some values for the angle if rotation , am i right ?
 

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Unfortunately your pictures are almost unreadable (and completely unreadable on a mobile device). Could we ask you to take a moment to generate your own images capturing the essential part of the problem?
 
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Nugatory said:
Unfortunately your pictures are almost unreadable (and completely unreadable on a mobile device). Could we ask you to take a moment to generate your own images capturing the essential part of the problem?
Which picture is not clear ?
 
They seem to look better than when I first looked at them. Did you fix them?
 
berkeman said:
They seem to look better than when I first looked at them. Did you fix them?
No, I didn't do anything to the diagram ...
 
new photo uploaded , can someone try to help now ?
 

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