Seismic damper MHD

viscous fluid

MAURER Hydraulic Dampers can complement seismic devices by isolators to achieve an even better system behavior as regards less forces and displacements for seismic load cases as well as the operational load case. MAURER Hydraulic Dampers dissipate energy by making use of the viscous behavior of liquids; they differ from commonly used linear viscous dampers by a reaction force at fast movements that is almost independent of velocity. This ensures optimal damping and avoids exceeded design limits. In case of an earthquake, an intelligent fluid flow system allows for relative movements and keeps the response force at a constant level. Key characteristics of MAURER Hydraulic Dampers: No leaking effects due to the triple-seal-guide system avoiding wearing or fatigue. Protection of device and structure by effective force limiter function with a special valve system. Less displacements and forces within the system with damping indices exponents of 0.04 to 1.0 Immediate lock-up after min. 1-3 mm displacement for service forces resulting from high rigidity due to low compressibility of the hydraulic oil. Optimum performance in any climate zone. Functional characteristics virtually independent of the temperature within -40°C to +40°C. Optimized design with CE-marking which is absolutely completely maintenance-free. No long term leaking in its resting state as the MHD is not pre-stressed and is not under any significant pressure. MAURER can provide semi-active dampers especially adapted to the needs of stay cables and tuned mass dampers.