Thank You for Your Consideration

[tracker890 Source h]

Homework Statement

Dear Everyone：
Q：Please help me to understand why to solve the bending moment of Ma by using the energy method is different from the solution?

Relevant Equations

Relevant Equations as follows.

Thank you for your time and consideration.

 

[tracker890 Source h]

 

[PhanthomJay]

I'm not sure what energy method you are using, but since the problem is statically determinate, you don't need to know any rotation angles. B is a hinged joint, not a support, so there is no moment in the beam at B. The solution appears correct. Keep it simple.

 

[tracker890 Source h]

Dear PhanthomJay ：
The energy method is Castigliano’s theorem and thank you for your help.

Castigliano’s theorem is ref. as follows：