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 parts
Dampers are mostly produced out of stainless steel for harsh environments. 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.
