Moment in a Beam: Consider Both Spans AB & BC

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The discussion centers on the analysis of a beam with spans AB and BC, questioning why only span AB is considered for calculations. Span AB is identified as statically indeterminate due to its fixed support at A and pinned support at B, resulting in four unknowns and only three equations of static equilibrium. In contrast, span BC can be analyzed using static methods alone, as it is simpler and does not require indeterminate analysis. Participants express confusion regarding the necessity of considering both spans in the calculations. The focus remains on the application of the slope-deflection method for solving statically indeterminate beams.
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Homework Statement


In this problem , why only caluclation of span AB is considered ? why the span BC isn't required ?

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The Attempt at a Solution


I think there's soemthing wrong with the question , We have to consider the calcilation of span BC also
 

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The slope-deflection method is used to solve for statically indeterminate beams using deflection and rotation equations to make the beam statically determinate. The free end span from the free end to the nearest support can be solved by statics alone, so there is no need for the indeterminate analysis in this span. I haven't used this method in ages.
 
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PhanthomJay said:
The slope-deflection method is used to solve for statically indeterminate beams using deflection and rotation equations to make the beam statically determinate. The free end span from the free end to the nearest support can be solved by statics alone, so there is no need for the indeterminate analysis in this span. I haven't used this method in ages.
sorry , i am confused now , why for span AB , it's statically indeterminate ?
 
fonseh said:
sorry , i am confused now , why for span AB , it's statically indeterminate ?
It is fixed at A and with a settled pin support at B. So there are 4 unknowns and just 3 equations of static equilibrium
 
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