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← TechnologyWhich outcome occurs when a composite steel-concrete beam experiences significant cryogenic cooling?
A)Differential thermal contraction fractures connections✓
B)Steel ductility increases, improving strength
C)Concrete shrinkage reduces bond stress
D)Uniform stress distribution optimizes loadbearing
💡 Explanation
Cryogenic load cases can initiate differential thermal contraction; the dissimilar materials contract at different rates, thus generating stress at the bonded interface rather than uniformly, because the coefficient of thermal expansion alters. Therefore, connection failure becomes probable.
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