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← HistoryWhich mechanical behavior critically increased risk when late pre-Columbian woven rope Inca suspension bridges experienced sustained rainfall?
A)Reduced tensile strength✓
B)Increased torsional stiffness
C)Elevated shear resistance
D)Decreased viscoelastic creep
💡 Explanation
Reduced tensile strength increased risk of bridge failure because sustained moisture caused the natural fiber ropes to weaken through hydrolysis. Therefore, ropes snapped more frequently, rather than exhibiting increased stiffness or shear resistance under load in dry conditions.
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