000018341 001__ 18341
000018341 005__ 20170118182218.0
000018341 04107 $$aeng
000018341 046__ $$k2017-01-09
000018341 100__ $$aInoue, Norio
000018341 24500 $$aFeasiblity of Viscous Mass Damper With Bingham Fluid Origined Force Restriction Mechanism for Base-Isolated Structure

000018341 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018341 260__ $$b
000018341 506__ $$arestricted
000018341 520__ $$2eng$$aViscous mass dampers with friction origin force restriction mechanism (force restricted viscous mass damper, hereinafter called FRVMD) are considered for base isolated structures. From a series of analytical studies, FRVMD can reduce the displacement of the base isolation layer, but they cannot reduce the floor response acceleration of the superstructure depending on the input ground motions. To improve the damper, viscous mass dampers with Bingham fluid origin force restriction (Bingham fluid – viscous mass damper, hereinafter called BF-VMD) is suggested. The BF-VMD has four design variables to be determined, the amount of the apparent mass, the viscous damping coefficient, the stiffness of buffer spring, and the damping coefficient of the Bingham fluid. In this paper, base isolated fivestory reinforced concrete structure incorporated with BF-VMD, FRVMD, or ordinary oil dampers with relief mechanism (hereinafter called OD) at the base isolation layer are considered as a common isolated structure. Three kinds of design criteria that are the displacement of the base isolation layer, the floor response acceleration, and the coefficient of the shear force, are defined for three levels of input ground motions, and the design variables that can fulfill all the design criteria are chosen by the optimum design method. The maximum responses given by the optimization results show that the structure with optimized BF-VMD can satisfy all the design criteria, whereas the structure with FRVMD or OD cannot satisfy the design criteria of the floor response acceleration. The response magnification of the floor response acceleration shows that the high frequency component of the floor response acceleration in case of BF-VMD becomes smaller than that in case of FRVMD. We infer that this is because of the difference of the mechanism on the force restriction.

000018341 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018341 653__ $$aBase isolation, Viscous mass damper, Optimum design method, Force restriction

000018341 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018341 720__ $$aInoue, Norio$$iIkenaga, Masahiro$$iIkago, Kohju
000018341 8560_ $$ffischerc@itam.cas.cz
000018341 8564_ $$s544533$$uhttps://invenio.itam.cas.cz/record/18341/files/1265.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1265.
000018341 962__ $$r16048
000018341 980__ $$aPAPER