000021620 001__ 21620
000021620 005__ 20170622131255.0
000021620 04107 $$aeng
000021620 046__ $$k2017-06-15
000021620 100__ $$aBitar, Ibrahim
000021620 24500 $$aA NOVEL MULTI-FIBER TIMOSHENKO BEAM FINITE ELEMENT FORMULATION WITH EMBEDDED DISCONTINUITIES TO SIMULATE THE BEHAVIOR OF REINFORCED CONCRETE STRUCTURE TILL FAILURE

000021620 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021620 260__ $$bNational Technical University of Athens, 2017
000021620 506__ $$arestricted
000021620 520__ $$2eng$$aA novel multi-fiber beam finite element formulation based on the Timoshenko model [1], [2] is proposed in this paper to simulate failure of reinforced concrete structural elements. The beam cross section is divided into fibers of concrete and steel. The behavior of these fibers is described with a continuum-discrete approach. In the bulk of the material, concrete fibers behave following a continuum damage mechanics law and steel fibers have a continuum elasto-plastic behaviour. A strong discontinuity is introduced, using the embedded discontinuity approach, to enrich the displacement field of the fibers in order to describe the opening of cracks in concrete and the development of plastic hinges in steel. The material behavior at the discontinuity is characterized by a discrete law linking the axial stress and the displacement jump through a linear relation, which allows capturing the released fracture energy. The variational formulation is presented in the context of the incompatible modes method. Moreover, the additional enhanced discontinuity modes are statically condensed at the fiber level. The corresponding computational procedure is also detailed. Several numerical applications and general remarks are finally provided to illustrate the performance of the proposed finite element. 

000021620 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021620 653__ $$a

000021620 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021620 720__ $$aBitar, Ibrahim$$iGrange, Stéphane$$iKotronis, Panagiotis$$iBenkemoun, Nathan
000021620 8560_ $$ffischerc@itam.cas.cz
000021620 8564_ $$s117738$$uhttps://invenio.itam.cas.cz/record/21620/files/17257.pdf$$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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000021620 962__ $$r21500
000021620 980__ $$aPAPER