000013210 001__ 13210
000013210 005__ 20161114160331.0
000013210 04107 $$aeng
000013210 046__ $$k2009-06-22
000013210 100__ $$aJehel, P.
000013210 24500 $$aA new fiber element for refined nonlinear modeling of rc frame structures in seismic loading

000013210 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013210 260__ $$bNational Technical University of Athens, 2009
000013210 506__ $$arestricted
000013210 520__ $$2eng$$aAccurate modeling of damping in nonlinear analysis of structures in seismic loading has become a challenging issue. As an alternative to commonly used global damping model such as Rayleigh’s one, physical modeling of damping requires refined nonlinear models and advanced computational strategies because energy dissipation sources are numerous and occur at different scales. The purpose of this contribution is to present a new fiber element for refined nonlinear modeling of RC frame structures. Compared to existing fiber elements, innovations have been developed at local, fiber, and element levels. Local problem couples continuum linear plasticity and damage and is solved without any iteration. Displacement field at fiber level is defined according to Euler-Bernoulli beam theory ; it is enhanced to allow modeling localization of the displacement and thus to provide a physical representation of the strain softening phase that occurs in quasi-brittle materials such as concrete. At the element level, the elementary stiffness matrix and internal forces vector are calculated by assembling the contribution of each fiber rather than the contribution of control sections. Simple examples are presented to illustrate some capabilities of this fiber element in quasi-static cyclic and monotonic loadings.

000013210 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013210 653__ $$aEarthquake Engineering, Fiber Element, Reinforced Concrete, Complementary Mixed Formulation, Localization of Displacement, FEM. Abstract. Accurate modeling of damping in nonlinear analysis of structures in seismic loading has become a challenging issue. As an alternative to commonly used global damping model such as Rayleigh’s one, physical modeling of damping requires refined nonlinear models and advanced computational strategies because energy dissipation sources are numerous and occur at different scales. The purpose of this contribution is to present a new fiber element for refined nonlinear modeling of RC frame structures. Compared to existing fiber elements, innovations have been developed at local, fiber, and element levels. Local problem couples continuum linear plasticity and damage and is solved without any iteration. Displacement field at fiber level is defined according to Euler-Bernoulli beam theory ; it is enhanced to allow modeling localization of the displacement and thus to provide a physical representation of the strain softening phase that occurs in quasi-brittle materials such as concrete. At the element level, the elementary stiffness matrix and internal forces vector are calculated by assembling the contribution of each fiber rather than the contribution of control sections. Simple examples are presented to illustrate some capabilities of this fiber element in quasi-static cyclic and monotonic loadings.

000013210 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013210 720__ $$aJehel, P.$$iIbrahimbegovic, A.$$iLeger, P.$$iDavenne, L.
000013210 8560_ $$ffischerc@itam.cas.cz
000013210 8564_ $$s94034$$uhttps://invenio.itam.cas.cz/record/13210/files/CD289.pdf$$yOriginal version of the author's contribution as presented on CD, section: Nonlinear dynamics (MS).
000013210 962__ $$r13074
000013210 980__ $$aPAPER