000021601 001__ 21601
000021601 005__ 20170622131254.0
000021601 04107 $$aeng
000021601 046__ $$k2017-06-15
000021601 100__ $$aCasapulla, Claudia
000021601 24500 $$aROCKING RESONANCE CONDITIONS OF LARGE AND SLENDER RIGID BLOCKS UNDER THE INTENSE PHASE OF AN EARTHQUAKE

000021601 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021601 260__ $$bNational Technical University of Athens, 2017
000021601 506__ $$arestricted
000021601 520__ $$2eng$$aA simplified approach is proposed in this paper for assessing the safety levels of the seismic response of large and slender rigid masonry blocks. The dynamic behavior of rigid free-standing blocks subjected to earthquake ground motions is highly non-linear and sensitive to small perturbations of various parameters. Many difficulties arise in defining reliable response spectra for such systems and these are well known in the literature. An artificial limit accelerogram is herein proposed to represent the most unfavorable effects of the intense phase of an earthquake. This consists of a sequence of instantaneous impulses, all applied right after the impact of the blocks on the ground. The resonance conditions also aim at highlighting to what extent the ground motion details and the system parameters can influence the rocking response. A secondary sequence of intermediate impulses is then introduced to reduce the resonance effects and to cover a broad range of conditions. Approximate equations of motion of the rocking blocks are also proposed and numerical analyses are performed to highlight the most significant aspects of the proposed approach.

000021601 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021601 653__ $$aMultiple impulses, rigid block dynamics, rocking amplification, size effect, resonance effects.

000021601 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021601 720__ $$aCasapulla, Claudia$$iMaione, Alessandra
000021601 8560_ $$ffischerc@itam.cas.cz
000021601 8564_ $$s391118$$uhttps://invenio.itam.cas.cz/record/21601/files/17190.pdf$$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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000021601 962__ $$r21500
000021601 980__ $$aPAPER