Fatigue Performance

DYNA Grip^® Stay Cable System

The system has proven its excellent performance and fulfills the requirements of fib Bulletin 30 as well as PTI & Setra requirements for fatigue and tensile strength.

1. Cap
2. Anchor Block
3. Wedges
4. Compression Tubes
5. Ring Nut
6. Bearing Plate
7. Sealing Plates
8. Spacer

9. Compression Plate
10. Strands
11. Recess Pipe
12. Vandalism Protection Pipe
13. Compaction Clamp
14. HDPE-Sheathing
15. HDPE-Sleeve
16. Dead Anchor

High Fatigue Performance

Multiple full size tests on cable sizes from 7 to 156 strands
The system has been successfully tested in standard tests with a stress range of up to 200MPa at an upper stress limit of 45% GUTS and at 2 million load cycles with anchorages inclined by 0.6°. In addition, full size tests have been performed successfully with an upper load of up to 60% GUTS, up to 10 million load cycles and a stress range of up to 250MPa
Tests on single strands under reversed cyclic flexural loading with 45% and 60% GUTS, 2 million load cycles with anchorages inclined by 3.0° and additional angular deviation between ± 10mrad and ± 35mrad

The leak tightness of the anchorage area has been demonstrated for the complete system and even meets stringent fib and Setra requirements with:

Up to 3m water head
Several load cycles in the longitudinal and transverse direction
Temperature cycling 20–70°C

DSI has the world’s first Multistrand Approval for Stay Cable Bridges!
Since April 2016, DSI has had a general technical approval for DYNA Grip^® Multistrand Stay Cables. It is the first approval around the world to regulate Multistrand Stay Cable Systems.

The approval includes Multistrand Stay Cables with 12 to 61 strands and also comprises alternative applications with and without guide elements, PE ducts and damper connections. This way, DSI underlines its know-how as a global system supplier. Larger Multistrand Systems can be evaluated project-specifically.