000013246 001__ 13246
000013246 005__ 20161114160333.0
000013246 04107 $$aeng
000013246 046__ $$k2009-06-22
000013246 100__ $$aVelde, J.
000013246 24500 $$aA nonlocal material model for predicting damage in steel structures under seismic excitation

000013246 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013246 260__ $$bNational Technical University of Athens, 2009
000013246 506__ $$arestricted
000013246 520__ $$2eng$$aDue to the need of evaluating structural safety of steel structures after an earthquake, a new method is proposed, which combines continuum damage mechanics with seismic engineering. A material model describes the evolution and distribution of damage in steel structures under seismic excitation by means of a set of internal damage 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. Afterwards, the damage variables are transformed into a global damage index in order to make a statement about structural stability and safety. Different tests are used to evaluate the model’s abilities. While static tests on CT-specimens verify the accuracy of the material model, dynamic tests describe the behavior of structures under time-dependent loading. Subsequent to the tests, global damage indices are calculated in order to characterize the condition of the structures.

000013246 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013246 653__ $$aContinuum Damage Mechanics, Strain Localization, 3D-FE-Analysis, Structural Dynamics, Earthquake Engineering. Abstract. Due to the need of evaluating structural safety of steel structures after an earthquake, a new method is proposed, which combines continuum damage mechanics with seismic engineering. A material model describes the evolution and distribution of damage in steel structures under seismic excitation by means of a set of internal damage 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. Afterwards, the damage variables are transformed into a global damage index in order to make a statement about structural stability and safety. Different tests are used to evaluate the model’s abilities. While static tests on CT-specimens verify the accuracy of the material model, dynamic tests describe the behavior of structures under time-dependent loading. Subsequent to the tests, global damage indices are calculated in order to characterize the condition of the structures.

000013246 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013246 720__ $$aVelde, J.$$iKowalsky, U.$$iDinkler, D.
000013246 8560_ $$ffischerc@itam.cas.cz
000013246 8564_ $$s691086$$uhttps://invenio.itam.cas.cz/record/13246/files/CD367.pdf$$yOriginal version of the author's contribution as presented on CD, section: Seismic safety assessment of structures - ii (MS).
000013246 962__ $$r13074
000013246 980__ $$aPAPER