What is fluid viscous damper?
Fluid Viscous Dampers Can Protect Your Structure. Fluid viscous dampers, or seismic dampers as they are sometimes referred to, are hydraulic devices that, when stroked, dissipate the energy placed on a structure by seismic events, wind buffering or thermal motion.
Where are viscous dampers used?
Viscous dampers may be used as a stand-alone damping unit to dampen a single or multiple resonances of underdamped structures such as piping systems, buildings (to reduce interstory drift), and floor systems or in conjunction with spring elements in vibration isolation applications and realization of tuned mass dampers …
How do you model tuned mass damper in Etabs?
Within SAP2000 or ETABS, a TMD may be modeled using a spring-mass system with damping. Guidelines for this subsystem are described as follows: Spring – Assign spring properties to a linear two-joint link object in which one joint is attached to the structure, and the other joint is free.
What are friction dampers?
Friction dampers are damping elements that convert the kinetic energy of moving components into thermal energy, thus reducing hard stops or avoiding excessively large vibration amplitudes. The friction or damping force can be controlled via the friction element.
Why are seismic dampers important?
Seismic Dampers are used in damping the oscillations of a building during an earthquake. The Dampers allow the building to move elastically and dissipate the energy of the earthquake. This, in turn, produces substantial savings as structural elements can be optimized for cost savings.
What causes viscous damping?
Viscous damping is caused by such energy losses as occur in liquid lubrication between moving parts or in a fluid forced through a small opening by a piston, as in automobile shock absorbers.
What is damping earthquake?
Damping in Structures. Another important aspect in Earthquake Resistant Design, ERD is Damping Characteristics of structures. Damping is a phenomenon that makes any vibrating body/structure to decay in amplitude of motion (Fig-19) gradually by means of energy dissipation through various mechanisms.