Internal Rotational Friction Damper for Bridge Stay Cables
High-performance cable vibration damper designed for seamless architectural integration.
Stay cables on cable-stayed bridges are subject to multiple sources of vibrations. The Damptech internal rotational friction damper provides a compact, robust solution that protects cables against fatigue while remaining completely concealed from view.
Key Advantages
Near-Anchor Installation: High damping efficiency allows the unit to be positioned very close to the cable anchorage, maximizing structural effectiveness where displacement amplitudes are small.
Architectural Integration: The compact rotational design fits inside the guide pipe or anchor housing, keeping bridge lines clean without visible external brackets.
100% Dry System: Operates on mechanical friction rather than hydraulic fluid, eliminating risk of leakage, fluid degradation, and seal wear.
Stable Energy Dissipation: Delivers consistent hysteretic damping performance across different frequencies and extreme environmental conditions.
Low Maintenance: Built for long service life in harsh infrastructure environments, minimizing long-term inspection and maintenance demands.
Low Temperature Sensitivity: Performance remains stable across temperature variations.
More pictures of cable-stayed bridge projects are coming soon.
Internal Cable Damper Mechanism:
Dampers were tested at multiple structural laboratories
Stainless steel dampers
Dampers are mostly produced out of stainless steel for harsh environments.
Photos from actual production. More project photos from bridges with 100–400 m stay cables coming soon.
Test results
Test results confirm stable performance across high cycle counts and high frequencies.
