Tectonus DFFJ
Tectonus DFFJ is a conventional friction damper, upgraded with Tectonus technology. Unlike other friction dampers, DFFJ demonstrates stable performance over a range of frequencies, with no loss of clamping force. The precise control of the load deformation curve allows for a best-in-class overstrength factor. Coupled with high damping this unlocks huge savings in construction costs across structure and foundations.
Stable E-P-P Performance
Tectonus DFFJ demonstrates Elastic-Perfectly-Plastic (E-P-P) hysteresis allowing for a simplified design process.
Any load and deformation capacity is possible and there is no limit to maximum deformation.
The device is configurable to the design level earthquake as set by the engineer of record.
Every unit is fully performance tested before shipment.
Next Generation Friction Damper
Friction dampers provide very high levels of damping without any yielding components. They can provide stable and repeatable load-deformation behavior without the need for replacement or repair.
Friction dampers can be predictable and stable for the range of frequencies typical of earthquake events. However, it is well known that friction dampers can suffer performance issues due to friction surface degradation and loss of clamping force.
Tectonus DFFJ overcomes this by applying a proprietary surface layer to the steel plates; and using disc springs which maintain clamping force in the event of any friction surface degradation.
Rigorously Tested
Thanks to our roots in academia, the DFFJ has been extensively tested as a component and as a full-scale system.- Steel brace system as per ASCE 07-16 (dynamic at 0.45 Hz)
- Steel brace system as per HCAI / OSHPD protocol
- Dynamic component test as per EN15129
- Dynamic component test as per ASCE 07-16.