000021772 001__ 21772
000021772 005__ 20170622131304.0
000021772 04107 $$aeng
000021772 046__ $$k2017-06-15
000021772 100__ $$aAvgenakis, Evangelos
000021772 24500 $$aA NEW COMPUTATIONAL APPROACH FOR THE ROCKING RESPONSE OF DEFORMABLE BODIES CONSIDERING MATERIAL NONLINEARITY

000021772 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021772 260__ $$bNational Technical University of Athens, 2017
000021772 506__ $$arestricted
000021772 520__ $$2eng$$aAn increasing interest in the use of rocking members in earthquake resistant structural systems has been observed in recent years. The benefits of such members include the limitation of the damage, re-centering capabilities and reduction of seismic forces transmitted to the rest of the structure due to a yield-like response. Despite the importance of such members, few models able to describe the response of flexible rocking members in structural systems realistically can be found in literature, since most of the research focuses on the response of rigid bodies or ignores the stress nonlinearity near the contact area, which is considered crucial to the accurate determination of the rocking response of deformable rocking bodies. A new macro-element formulation for elastic rocking members has been proposed by the authors in previous papers which is able to take into account this stress nonlinearity, producing results which are very close to the ones produced by conventional finite element programs. Rocking members in structural systems are expected to behave inelastically for large seismic excitations. In this paper, the macroelement presented previously by the authors, which considered the element material to be elastic, is extended to also take material nonlinearity into account. The effect of the nonlinear stress distribution across the rocking interface on the member displacements is determined and approximate formulas for their determination are included in the macro-element formulation. The results produced by the macro-element with the inelastic material are finally compared to the ones of conventional finite element codes, showing very good agreement between the results of the two methods.

000021772 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021772 653__ $$aRocking, Macroelement, Nonlinear analysis, Inelastic response, Resilient structures.

000021772 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021772 720__ $$aAvgenakis, Evangelos$$iPsycharis, Ioannis N.
000021772 8560_ $$ffischerc@itam.cas.cz
000021772 8564_ $$s1024428$$uhttps://invenio.itam.cas.cz/record/21772/files/17884.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS30] Dynamics and Seismic Response of Rocking and Self-centering Structures
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000021772 962__ $$r21500
000021772 980__ $$aPAPER