000013092 001__ 13092
000013092 005__ 20161114160327.0
000013092 04107 $$aeng
000013092 046__ $$k2009-06-22
000013092 100__ $$aCotsovos D., M.
000013092 24500 $$aFinite element modelling of structural concrete

000013092 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013092 260__ $$bNational Technical University of Athens, 2009
000013092 506__ $$arestricted
000013092 520__ $$2eng$$aOver the years a large number of finite element analysis programs have been developed in order to investigate the behaviour of reinforced concrete (RC) elements and structures. These are based on the use of a wide range of concrete material laws, the majority of which can be classified as empirical, plastic, visco-plastic, damage and hybrid, depending on the theory or combination of theories upon which their analytical formulation is based. The formulation of most, if not all, of these material models relies heavily on a number of empirical parameters, the inclusion of which is essential for defining material behaviour. These parameters are usually linked to post-peak concrete characteristics such as, for example, strain softening, tension stiffening, shear-retention ability, etc, coupled with stress- and/or strainrate sensitivity when high-rate loading problems are considered; their values often vary depending on the type of problem investigated. Three widely used packages, (LS-DYNA, ANSYS and ABAQUS), are adopted in the present work in order to investigate analytically the experimental response of simply supported RC beams under monotonic loading applied at various rates, ranging from static and earthquake to rates encountered in impact and blast problems. A fundamental assumption adopted in the case studies investigated herein, is that for the case of high-rate-loading, concrete constitutive behaviour is essentially independent of the loading rate and that the effect of the latter on structural response can be primarily attributed to inertia forces. The predictions obtained are compared with published experimental data as well as the predictions of a specialized in concrete structures analysis package (RC-FINEL), which, in contrast with the above packages, incorporates a fully brittle material law for the constitutive description of concrete behaviour under triaxial loading. The aim of the present investigation is to explore the generality and applicability of the FE models presently adopted and their ability to yield realistic predictions of structural concrete behaviour.

000013092 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013092 653__ $$aConcrete, RC beams, Finite Elements, Nonlinear Analysis, Brittle, Ductile, Shear retention factor, Loading rate, Abstract. Over the years a large number of finite element analysis programs have been developed in order to investigate the behaviour of reinforced concrete (RC) elements and structures. These are based on the use of a wide range of concrete material laws, the majority of which can be classified as empirical, plastic, visco-plastic, damage and hybrid, depending on the theory or combination of theories upon which their analytical formulation is based. The formulation of most, if not all, of these material models relies heavily on a number of empirical parameters, the inclusion of which is essential for defining material behaviour. These parameters are usually linked to post-peak concrete characteristics such as, for example, strain softening, tension stiffening, shear-retention ability, etc, coupled with stress- and/or strainrate sensitivity when high-rate loading problems are considered; their values often vary depending on the type of problem investigated. Three widely used packages, (LS-DYNA, ANSYS and ABAQUS), are adopted in the present work in order to investigate analytically the experimental response of simply supported RC beams under monotonic loading applied at various rates, ranging from static and earthquake to rates encountered in impact and blast problems. A fundamental assumption adopted in the case studies investigated herein, is that for the case of high-rate-loading, concrete constitutive behaviour is essentially independent of the loading rate and that the effect of the latter on structural response can be primarily attributed to inertia forces. The predictions obtained are compared with published experimental data as well as the predictions of a specialized in concrete structures analysis package (RC-FINEL), which, in contrast with the above packages, incorporates a fully brittle material law for the constitutive description of concrete behaviour under triaxial loading. The aim of the present investigation is to explore the generality and applicability of the FE models presently adopted and their ability to yield realistic predictions of structural concrete behaviour.

000013092 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013092 720__ $$aCotsovos D., M.$$iZeris C., A.$$iAbbas A., A.
000013092 8560_ $$ffischerc@itam.cas.cz
000013092 8564_ $$s671619$$uhttps://invenio.itam.cas.cz/record/13092/files/CD121.pdf$$yOriginal version of the author's contribution as presented on CD, section: Reinforced concrete structures - i.
000013092 962__ $$r13074
000013092 980__ $$aPAPER