000013194 001__ 13194
000013194 005__ 20161114160331.0
000013194 04107 $$aeng
000013194 046__ $$k2009-06-22
000013194 100__ $$aLebon, G.
000013194 24500 $$a3d nonlinear finite element simulations of a rc building mock-up subject to tri-dimensional earthquake

000013194 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013194 260__ $$bNational Technical University of Athens, 2009
000013194 506__ $$arestricted
000013194 520__ $$2eng$$aSevere loadings such as earthquake on reinforced concrete structures induce strong nonlinear behaviors till rupture, due to concrete cracking, steel plasticity and bond-slip between the materials. The opportunity to perform predictive analysis in nonlinear transient dynamics leads to some simplifications: at the structural scale by employing for example simplified analysis numerical tools such as multifibre beams analysis or shell elements for 2 D structural elements, or at the material level by omitting to account for some damaging or degradations mechanisms. The aim of this presentation is to expose the ability of a complex damage induced anisotropic constitutive model to be used in the framework of seismic nonlinear analysis. If one has to account for crack spacing or opening in a concrete structure, the material model has also to deal with the crack orientation. Recent developments [9] allow accounting for a second order damage tensor in the stress-strain constitutive equations for concrete and keeping in the same way the simplicity of an explicit numerical implementation by choosing a strain based free energy. Some modifications allow introducing the non-monotonic loading, key point in earthquake engineering, and the crack closure (concomitant to complete or partial stiffness recovery) in the thermodynamic formulation. The thermodynamic formulation as well as the numerical implementation will be presented, insuring a robust and efficient analysis under cyclic loading. The case study of the SMART mock-up will be analyzed. It is a 40 tons reinforced concrete building, 1/4 scale, and subject to strong earthquake in the 3 directions. The experimental campaign has been performed at CEASaclay, using the TAMARIS facility. The ability of the model to predict the global behavior as well as the crack pattern under strong ground motion is emphasized.

000013194 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013194 653__ $$aAnisotropy induced damage, stiffness recovery, reinforced concrete, SMART Abstract. Severe loadings such as earthquake on reinforced concrete structures induce strong nonlinear behaviors till rupture, due to concrete cracking, steel plasticity and bond-slip between the materials. The opportunity to perform predictive analysis in nonlinear transient dynamics leads to some simplifications: at the structural scale by employing for example simplified analysis numerical tools such as multifibre beams analysis or shell elements for 2 D structural elements, or at the material level by omitting to account for some damaging or degradations mechanisms. The aim of this presentation is to expose the ability of a complex damage induced anisotropic constitutive model to be used in the framework of seismic nonlinear analysis. If one has to account for crack spacing or opening in a concrete structure, the material model has also to deal with the crack orientation. Recent developments [9] allow accounting for a second order damage tensor in the stress-strain constitutive equations for concrete and keeping in the same way the simplicity of an explicit numerical implementation by choosing a strain based free energy. Some modifications allow introducing the non-monotonic loading, key point in earthquake engineering, and the crack closure (concomitant to complete or partial stiffness recovery) in the thermodynamic formulation. The thermodynamic formulation as well as the numerical implementation will be presented, insuring a robust and efficient analysis under cyclic loading. The case study of the SMART mock-up will be analyzed. It is a 40 tons reinforced concrete building, 1/4 scale, and subject to strong earthquake in the 3 directions. The experimental campaign has been performed at CEASaclay, using the TAMARIS facility. The ability of the model to predict the global behavior as well as the crack pattern under strong ground motion is emphasized.

000013194 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013194 720__ $$aLebon, G.$$iRagueneau, F.$$iDesmorat, R.
000013194 8560_ $$ffischerc@itam.cas.cz
000013194 8564_ $$s981916$$uhttps://invenio.itam.cas.cz/record/13194/files/CD261.pdf$$yOriginal version of the author's contribution as presented on CD, section: Reinforced concrete structures - i.
000013194 962__ $$r13074
000013194 980__ $$aPAPER