000022363 001__ 22363
000022363 005__ 20170622150009.0
000022363 04107 $$aeng
000022363 046__ $$k2015-05-25
000022363 100__ $$aMariani, Valentina
000022363 24500 $$aTHE EFFECTS OF THE AXIAL LOAD VARIATION ON THE SEISMIC PERFORMANCE OF EXISTING RC BUILDINGS

000022363 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022363 260__ $$bNational Technical University of Athens, 2015
000022363 506__ $$arestricted
000022363 520__ $$2eng$$aIt is well known that the axial load plays an important role in the evaluation of the structural capacity of RC columns. In existing buildings this problem can be even more relevant than in new ones, since the material can easily present poor mechanical properties. The paper is aimed at investigating the role of the axial load variation on the seismic performance of RC columns, evaluated in terms of limit chord rotation and shear force, according to the EC8 provisions. The study is developed with reference to a case-study, which is a doubly symmetric 4-storey RC building. A dynamic (time history) analysis has been performed by adopting a fiber model for the cross section of the concrete members, to determine the structural response under the assumed seismic excitation. An ensemble of 7 ground motions, spectrum-compatible with the elastic spectrum provided by EC8 has been assumed as seismic input. The combined effects of the strength variability and axial load variation have been checked on the seismic performance of the columns of the 1st storey, which presented the higher levels of compression and axial load variation.

000022363 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022363 653__ $$aRC framed structures, seismic assessment, axial load sensitivity, concrete strength variability.

000022363 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022363 720__ $$aMariani, Valentina$$iStefano, Mario De$$iViti, Stefania$$iTanganelli, Marco
000022363 8560_ $$ffischerc@itam.cas.cz
000022363 8564_ $$s690386$$uhttps://invenio.itam.cas.cz/record/22363/files/C604.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022363 962__ $$r22030
000022363 980__ $$aPAPER