000021956 001__ 21956
000021956 005__ 20170622131314.0
000021956 04107 $$aeng
000021956 046__ $$k2017-06-15
000021956 100__ $$aTomassetti, Umberto
000021956 24500 $$aENERGY DISSIPATION INVOLVED IN THE OUT-OF-PLANE RESPONSE OF UNREINFORCED MASONRY WALLS

000021956 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021956 260__ $$bNational Technical University of Athens, 2017
000021956 506__ $$arestricted
000021956 520__ $$2eng$$aThe assessment of the out-of-plane response of masonry has been largely investigated in literature assuming walls responding as rigid blocks or assemblies of rigid bodies. Several studies developed numerical integration of single-degree-of-freedom and multi-degree of freedom systems for the simulation of the OOP dynamic rocking response of simple mechanisms. Modelling the energy dissipation involved in such mechanisms is extremely important to capture the dependence of the damping phenomenon with the system frequency. Some studies, recurring to the classical hypothesis of the impulsive dynamics, simulated the energy dissipation by means of the coefficient of restitution assuming as the overall reduction of energy were concentrated at the instant of the impact. In other works, the damping force has been modelled as a velocity dependent acting force through a constant, variable or stiffness proportional damping ratio. The two damping models are compared highlighting advantages and shortcomings of each system. This paper proposes a numerical formulation for the direct equivalence of the two damping approaches for simple OOP one-way bending mechanisms assuming as force-displacement relationship nonlinear elastic tri-linear curves.

000021956 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021956 653__ $$aURM, out-of-plane, rocking, one-way bending, coefficient of restitution, elastic viscous damping ratio.

000021956 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021956 720__ $$aTomassetti, Umberto$$iMagenes, Guido$$iPenna, Andrea$$iGraziotti, Francesco
000021956 8560_ $$ffischerc@itam.cas.cz
000021956 8564_ $$s1688179$$uhttps://invenio.itam.cas.cz/record/21956/files/18454.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS30] Dynamics and Seismic Response of Rocking and Self-centering Structures
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000021956 962__ $$r21500
000021956 980__ $$aPAPER