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← HistoryWhich outcome occurs when ropes supporting an Inca suspension bridge experience extreme diurnal temperature variation?
A)Increased material fatigue rate✓
B)Greater deck load distribution
C)Improved structural rigidity overall
D)Reduced bridge oscillation frequency
💡 Explanation
Increased material fatigue rate arises via thermal expansion due to cyclic stressing; Rope creep occurs because rope tension changes greatly over the temperature range. This induces rope creep, which reduces the rope strength; therefore, fatigue life decreases rather than structural improvement. Other benefits will not occur.
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