000022246 001__ 22246
000022246 005__ 20170622150004.0
000022246 04107 $$aeng
000022246 046__ $$k2015-05-25
000022246 100__ $$aHosseini, Mahmood
000022246 24500 $$aUSING RIGID BLOCK MODEL WITH MASS ECCENTRICITY IN DYNAMIC ANALYSIS OF HOSPITALS - EQUIPMENT UNDER SIMULTANEOUS EFFECT OF HORIZONTAL AND VERTICAL GROUND EXCITATIONS

000022246 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022246 260__ $$bNational Technical University of Athens, 2015
000022246 506__ $$arestricted
000022246 520__ $$2eng$$aAppropriate performance of hospitals is of crucial importance in the aftermath of earthquakes. On the other hand, proper performance of a hospital is quite dependent on the operation of its nonstructural equipment and components. Therefore, in the studies of seismic performance of hospitals, either for design of future hospital or for evaluation of the existing ones, consideration of seismic performance of equipment is a must. Many of hospitals’ equipment have a rigid block configuration. In this study the ‘rigid block model’ is used for molding some special equipment of hospitals, which have non-uniform distribution of mass or ‘mass eccentricity’. Medicine cupboard and ventilator in surgical operating room are samples of this type of equipment. Studying the seismic behavior of this kind of rigid block is quite complicated due to geometrical nonlinearity. In the previous studies, the seismic behavior of this type of rigid blocks has been investigated by using only a single horizontal component of the earthquake excitations and the effect of vertical component has been neglected. This is while in the case of near-source earthquakes usually the vertical component of ground motion can be very strong. In this study the complex behavior of rigid blocks with non-uniform distribution of mass is studied subjected to simultaneous horizontal and vertical components of ground motion, and the results are compared with those of the case of using only one horizontal component. At first the governing equation of motion have been derived, and then by using some selected earthquake records, the seismic response of the rigid block has been obtained employing fourth order Runge-Kutta-Nistrom technique. Numerical results show that the response of the rigid block is very sensitive to the amount of mass eccentricity on the one hand and the specifications of the ground excitations on the other. Results also show that in many cases the effect of vertical ground motion can lead to toppling of the block, while the horizontal component alone cannot overturn the block.

000022246 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022246 653__ $$a

000022246 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022246 720__ $$aHosseini, Mahmood$$iNezamisavogbolaghi, Kaveh$$iMahmoudzadeh, Amir
000022246 8560_ $$ffischerc@itam.cas.cz
000022246 8564_ $$s9846$$uhttps://invenio.itam.cas.cz/record/22246/files/C1645_abstract.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022246 962__ $$r22030
000022246 980__ $$aPAPER