000021686 001__ 21686
000021686 005__ 20170622131259.0
000021686 04107 $$aeng
000021686 046__ $$k2017-06-15
000021686 100__ $$aKarayannis, Christos G.
000021686 24500 $$aTORSION EFFECT DUE TO ASYMMETRIC SEISMIC POUNDING BETWEEN MULTISTORY BUILDINGS

000021686 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021686 260__ $$bNational Technical University of Athens, 2017
000021686 506__ $$arestricted
000021686 520__ $$2eng$$aEarthquake induced collisions between adjacent structures have been repeatedly reported in the literature as a frequent case of damage. It is quite usual seismic induced oscillations of a structure in a block of buildings to be partly restrained in lateral displacements and therefore a torsional movement to be introduced in the building during an earthquake excitation. Further it has been repeatedly observed that torsion is a critical factor leading in many occasions to major structural damage or even complete collapse during strong ground motions. Seismic damage surveys and relevant analyses conducted on modes of failure of building structures during past severe earthquakes have concluded that among the most damage susceptible structures are those that exhibit torsional behavior. In this work the case of reinforced concrete multistory buildings that suffer pounding in a non-symmetric way is studied. Pounding occurs only in one (case 1) or two (case 2) columns of the structure whereas the other columns are free to move without restrictions. This way torsional oscillations are introduced in the structural system during a seismic excitation. Nonlinear dynamic step-bystep analysis and special purpose elements are employed for the needs of this study. More than fifty pounding cases with torsional effect between structures with different total height for three excitations are studied and results in terms of displacements, torsional rotations, ductility requirements are presented and commented. The influence of the size of the gap distance between the adjacent structures on the torsion effect is also investigated. The results clearly show that high capacity requirements in terms of torsional moments, column shear strength and ductility are developed due to the asymmetric pounding.

000021686 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021686 653__ $$aAsymmentric structural pounding, multistory reinforced concrete structures, nonlinear dynamics analysis, Earthquake Engineering.

000021686 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021686 720__ $$aKarayannis, Christos G.$$iNaoum, Maria C.
000021686 8560_ $$ffischerc@itam.cas.cz
000021686 8564_ $$s484069$$uhttps://invenio.itam.cas.cz/record/21686/files/17503.pdf$$yOriginal version of the author's contribution as presented on CD, section: [RS05] Dynamics of coupled problems
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000021686 962__ $$r21500
000021686 980__ $$aPAPER