000021694 001__ 21694
000021694 005__ 20170622131300.0
000021694 04107 $$aeng
000021694 046__ $$k2017-06-15
000021694 100__ $$aHeitz, Thomas
000021694 24500 $$aHOW ARE THE EQUIVALENT DAMPING RATIOS MODIFIED BY NONLINEAR ENGINEERING DEMAND PARAMETERS?

000021694 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021694 260__ $$bNational Technical University of Athens, 2017
000021694 506__ $$arestricted
000021694 520__ $$2eng$$aWhen attempting to predict the seismic response of reinforced concrete (RC) structures, a trade-off has to be found out between a realistic representation of the dissipations through material behavior law and a numerically more efficient modeling with a controlled computational demand such as a Rayleigh-type damping model. Anyway, constitutive laws only describe internal dissipation and actually need a complementary dissipation term often chosen as a proportional damping matrix to take into account external dissipation sources such as interactions with the environment. Decoupling these two contributions in global dissipation measurement from experimental tests is still challenging. To address this problem, a numerical study based on an experimentally identified structural model is here presented. To this end, an experimental campaign has been carried out on RC beams set up on the AZALEE shaking table of the TAMARIS experimental facility operated by the French Alternative Energies and Atomic Energy Commission (CEA). In this paper, the experimental campaign is first presented. Secondly, a suited constitutive model is formulated and identified from the experimental results. Third, numerical dynamic experiments are carried out in order to assess the influence of several parameters on the energy dissipation and on the equivalent viscous damping ratio through two different methods. The validity of these results is assessed on a numerical case where a nonlinear model and an equivalent linear model are compared with each other. Experimental results of dynamic tests are also used as reference in order to estimate the additional viscous damping necessary to take into account the whole energy dissipation.

000021694 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021694 653__ $$aDissipations, Reinforced concrete, Viscous damping, Experiments, Model identification, TAMARIS

000021694 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021694 720__ $$aHeitz, Thomas$$iRagueneau, Frédéric$$iRichard, Benjamin$$iGiry, Cédric
000021694 8560_ $$ffischerc@itam.cas.cz
000021694 8564_ $$s1025609$$uhttps://invenio.itam.cas.cz/record/21694/files/17531.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS26] The SINAPS@ French research project on integrated seismic risk assessment for nuclear safety
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000021694 962__ $$r21500
000021694 980__ $$aPAPER