000021661 001__ 21661
000021661 005__ 20170622131258.0
000021661 04107 $$aeng
000021661 046__ $$k2017-06-15
000021661 100__ $$aHuguet, Miquel
000021661 24500 $$aA NEW GLOBAL MODEL FOR CRACKING IN RC WALLS AND SLABS UNDER SEISMIC LOADINGS

000021661 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021661 260__ $$bNational Technical University of Athens, 2017
000021661 506__ $$arestricted
000021661 520__ $$2eng$$aNonlinear calculations of Reinforced Concrete (RC) buildings of Nuclear Power Plants (NPP) allow a better representation of their real structural behavior. The steel reinforcement design of these facilities and the seismic margin assessment of the existing ones are less conservative when considering the nonlinear behavior of RC structures. In this framework, the global cyclic constitutive model GLRC_HEGIS for RC walls and slabs is presented in this work. The developed model accounts for four different nonlinear physical phenomena: concrete cracking, concrete damage, steel-concrete slip and steel yielding. A fixed concrete crack pattern is considered in each finite element after cracking onset: crack orientation and spacing are determined by the stress state at the formation of the first crack. Concrete damage reproduces the loss of concrete stiffness when submitted to high stress. Reinforcement steel bars are supposed to yield at their intersection with cracks, where maximum steel stress is found due to the tension stiffening effect originated by the considered steel-concrete slip. The global stress-resultant model (which does not need multilayer modeling) is obtained by performing an analytical multi-scale analysis, accounting for in-plane efforts and out-of-plane bending moments. The implementation of GLRC_HEGIS in shell finite element models allows an efficient numerical computation of earthquake engineering applications of RC buildings, as pushover or transient dynamics analyses. GLRC_HEGIS model is applied to experimental tests on RC shear walls (CEOS.fr and SAFE programs) and to a transient dynamic analysis on the SMART benchmark mock-up representing a typical RC building of a nuclear facility. In addition of typical comparisons at the global scale (force-displacement curves), local comparisons are also shown since all the information relative to the considered physical phenomena, as steel plastic strain, steel-concrete slip, crack width or crack tangential slip, are obtained as a direct result of the finite element computation (they are internal variables of the constitutive model), see the following figure.

000021661 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021661 653__ $$a

000021661 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021661 720__ $$aHuguet, Miquel$$iVoldoire, François$$iKotronis, Panagiotis$$iErlicher, Silvano
000021661 8560_ $$ffischerc@itam.cas.cz
000021661 8564_ $$s472614$$uhttp://invenio.itam.cas.cz/record/21661/files/17417.pdf$$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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000021661 962__ $$r21500
000021661 980__ $$aPAPER