000010834 001__ 10834
000010834 005__ 20141205155808.0
000010834 04107 $$aeng
000010834 046__ $$k2008-10-12
000010834 100__ $$aMagliulo, Gennaro
000010834 24500 $$aSeismic Perfomance of R/C Frames with Regular and Irregular Strength Vertical Distributions

000010834 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010834 260__ $$b
000010834 506__ $$arestricted
000010834 520__ $$2eng$$aThe paper presents the results of a research study concerning the seismic response and design of RC frames with strength discontinuities in elevation. The irregularities are obtained assigning overstrengths either to the beams or to the columns of a “regular frame” (assumed as reference). The “regular frame” is designed according to the Eurocode 8 (EC8) High Ductility Class (DCH) rules. The overstrengths of presumed irregular frames are assigned modifying the reinforcement either of the beams or of the columns at different floors. For all frames the criteria of vertical strength irregularity of many international seismic codes are applied. To this purpose, the storey strengths are computed by two different methods: the first one only takes into account the flexural resistance of columns, while the second one also considers the beam flexural resistance. Non linear static and dynamic analyses are performed: mechanical non linearity is concentrated at the element ends. These analyses are carried out according to EC8 provisions: for non linear static analysis the N2 method is applied; in the case of non linear time-history analyses, seven real earthquakes, selected in order to fit on average the elastic design spectrum are used as input. The seismic response of frames characterised by the assigned overstrength is not very different with respect to the “regular frame” one; this demonstrates that the sensitivity of frames, designed according to High Ductility Class, to overstrength vertical variations is low. Indeed all the frames satisfy the Ultimate Limit State, verified by the application of both the non linear static and the non linear dynamic analysis.

000010834 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010834 653__ $$aVertical strength irregularity, story strength, non linear analysis, seismic design, ductility class. 

000010834 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010834 720__ $$aMagliulo, Gennaro$$iRamasco, Roberto
000010834 8560_ $$ffischerc@itam.cas.cz
000010834 8564_ $$s181441$$uhttps://invenio.itam.cas.cz/record/10834/files/08-02-0079.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 08-02-0079.
000010834 962__ $$r9324
000010834 980__ $$aPAPER