The 'wind-induced vibration' of a long-span cable-stayed bridge deck is controlled by:
Choose the correct answer
Only by increasing deck self-weight
Streamlined deck section (aerofoil), guide vanes/fairing, and tuned mass dampers (TMD) — prevent flutter and VIV
Painting the deck with anti-rust paint
Only by using shorter spans
Correct Answer
B. Streamlined deck section (aerofoil), guide vanes/fairing, and tuned mass dampers (TMD) — prevent flutter and VIV
AI Detailed Explanation & IS Code Reference
Unlock the reasoning, formula path and code-linked notes inside your student dashboard.
Wind effects on bridges: (1) Flutter (self-excited aeroelastic instability — coupled bending + torsion → catastrophic, Tacoma Narrows); (2) Vortex-induced vibrations (VIV) — lock-in at critical wind speed; (3) Buffeting (turbulent wind). Control: (1) Aerodynamic deck shape (streamlined box girder); (2) Fairing and guide vanes; (3) Tuned mass dampers (TMD); (4) Increased torsional stiffness (π-shape deck section). Wind tunnel testing mandatory for long-span bridges.
ScoreCardAI links this solution with subject, topic and difficulty signals so your scorecard can identify weak areas after a full mock test.
Practice more Civil Engineering questions
This MCQ belongs to JE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.