A Rotating Mass Damper for Passive Seismic Control of Rigid-Block Type Equipment Above Isolated Floors


Abstract eng:
In recent years the issue of Performance-Based Seismic Design of structures (PBSD), is widely applied in the design methods. In PBSD, seismic levels and structural as well as non-structural performance are simultaneously considered. Seismic consequences such as human and financial losses are included in this design methodology. Equipment in service centers such as hospitals, power switching centers and control rooms have an important role for the function of these centers. Industrial machinery, electronics and instrumentation, as well as block-shaped equipment are among the important elements between equipment. Seismic isolation of the equipment has been shown effective for enhancing their performance and causing stability and reducing vulnerability during strong ground motions. An innovative isolation system including ball bearings and a rotating mass damper is introduced for this purpose. The idea was already proposed for buildings. The damper is composed of a horizontal rotating wheel attached to both the upper and lower isolation level. The generated force shows a negative stiffness in force-displacement diagram. The system dissipates energy by the inertia force generated by the rotating mass. The dynamic response of the rigid block equipment above the mentioned isolation system is numerically evaluated with a suite of seismic records. The results demonstrate a reasonable response of the isolation system comparing with the traditional installation methods.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 4395.:
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