Civil Engineering MCQAE Level Civil Engineering
A fixed beam is subjected to a temperature gradient where top fiber temperature rises by ΔT more than the bottom. The type of stresses induced at the fixed ends are:
Structural AnalysisTemperature Effect Fixed BeamMEDIUM
Choose the correct answer
A
Tensile at top, compressive at bottom
B
Compressive at top, tensile at bottom
C
Only shear stresses
D
No stresses (free to deform)
Correct Answer
B. Compressive at top, tensile at bottom
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Temperature gradient makes the beam want to hog (top compresses, bottom extends). Fixed supports prevent rotation, inducing hogging moments at the ends: compression at top and tension at bottom of the beam section.
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