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← HistoryWhich consequence resulted when historical rope bridges experienced dynamic load increases?
A)Amplified sympathetic vibrational fracturing✓
B)Increased tensile cable strain hardening
C)Reduced catenary cable support tension
D)Decreased aerodynamic cable wind flutter
💡 Explanation
Dynamic load increases can align with natural resonant modes of the bridge, triggering amplified sympathetic vibrational fracturing because the rope bridge structure's damping coefficient is insufficient to dissipate energy. Therefore, increased movement and risk of failure grows, rather than strain hardening or aerodynamic benefits.
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