Civil Engineering MCQAE Level Civil Engineering
For a two-span continuous beam with equal spans L and UDL w on both spans, the reaction at the INTERIOR (middle) support is:
Structural AnalysisContinuous Beam Interior ReactionMEDIUM
Choose the correct answer
A
3wL/8
B
5wL/4
C
wL
D
3wL/4
Correct Answer
B. 5wL/4
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By three-moment equation: interior moment M_B = wL²/8. Reaction at interior support: R_B = 5wL/4 (more than the total load on one span). Outer reactions: R_A = R_C = 3wL/8 each.
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