000021511 001__ 21511
000021511 005__ 20170622131249.0
000021511 04107 $$aeng
000021511 046__ $$k2017-06-15
000021511 100__ $$aWahrhaftig, Alexandre De Macêdo
000021511 24500 $$aRESONANCE EVALUATION WITH GEOMETRIC STIFFNESS AND CREEP OF SLENDER BEAM OF REINFORCED CONCRETE

000021511 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021511 260__ $$bNational Technical University of Athens, 2017
000021511 506__ $$arestricted
000021511 520__ $$2eng$$aThis article assesses the occurrence of resonance with the effects of geometric stiffness and creep in the vibration of a prestressed reinforced concrete beam. A mathematical model based on the Rayleigh method is used, designed to represent a simply supported beam, intended to function as the base of an engine. The gross cross-section of the beam is set to an arrangement of passive reinforcement that is able to resist the effort provided in the simulation, treated by the method of homogenized section. Creep is taken into account through a three-parameter rheological model that conduces to a temporal modulus of elasticity; a normal force of compression reproduces the post tensioning force, which changes the stiffness, and consequently, the natural frequency of vibration of the structure with time. The results from the numerical simulation indicate resonant and non-resonant schemes between the natural frequency of the beam and the frequency of the engine predicted in the mathematical considerations.

000021511 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021511 653__ $$aNumerical Simulation, Resonance, Reinforced Concrete, Geometric Stiffness, Creep.

000021511 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021511 720__ $$aWahrhaftig, Alexandre De Macêdo$$iBrasil, Reyolando M. L. R. F.$$iNascimento, Lázaro S. M. S. C.
000021511 8560_ $$ffischerc@itam.cas.cz
000021511 8564_ $$s454062$$uhttps://invenio.itam.cas.cz/record/21511/files/16773.pdf$$yOriginal version of the author's contribution as presented on CD, section: [RS30] Concrete structural members
.
000021511 962__ $$r21500
000021511 980__ $$aPAPER