000013563 001__ 13563
000013563 005__ 20161114165846.0
000013563 04107 $$aeng
000013563 046__ $$k2011-05-25
000013563 100__ $$aHeinrich, S.
000013563 24500 $$aDamage Evolution in Steel Structures Under Seismic Excitation

000013563 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013563 260__ $$bNational Technical University of Athens, 2011
000013563 506__ $$arestricted
000013563 520__ $$2eng$$aFor the purpose of energy dissipation steel structures exposed to seismic loading intentionally experience inelastic material behavior. Experiments of mild construction steel have shown that the behavior of structural steel is highly sensitive to loading velocity. Under cyclic loading, the Bauschinger effect decreases the yield stress. In addition, the steel suffers from material damage if the material is subjected to inelastic deformations. Therefore, to evaluate the structural safety of steel structures in case of earthquakes, a more detailed description of the material behavior is inevitable. The proposed material model describes the evolution and distribution of inelastic strains and damage in steel structures under seismic excitation by means of a set of internal variables. The model takes into account viscoplastic material behavior, isotropic and kinematic hardening, ductile damage, and a nonlocal extension in the form of an implicit gradient formulation to overcome the phenomenon of strain localization. To determine the material model parameters, numerical results are compared with experiments under static and dynamic loading. In order to indicate the influence of the description of the material behavior on the respsonse of 3D structures subjected to seismic excitation different approaches for the material are used.

000013563 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013563 653__ $$aContinuum damage mechanics, isotropic hardening, kinematic hardening, softening, seismic excitation, structural analysis, global damage index

000013563 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013563 720__ $$aHeinrich, S.$$iKowalsky, U.$$iVelde, J.$$iDinkler, D.
000013563 8560_ $$ffischerc@itam.cas.cz
000013563 8564_ $$s764355$$uhttps://invenio.itam.cas.cz/record/13563/files/288.pdf$$yOriginal version of the author's contribution as presented on CD, section: RS 20 Steel Structures.
000013563 962__ $$r13401
000013563 980__ $$aPAPER