000022403 001__ 22403
000022403 005__ 20170622150012.0
000022403 04107 $$aeng
000022403 046__ $$k2015-05-25
000022403 100__ $$aBertolesi, Elisa
000022403 24500 $$a3D FE PUSHOVER AND NON-LINEAR DYNAMIC ANALYSES OF A MASONRY CHIMNEY BEFORE AND AFTER SHORTENING

000022403 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022403 260__ $$bNational Technical University of Athens, 2015
000022403 506__ $$arestricted
000022403 520__ $$2eng$$aA masonry chimney 50 meters high, severely damaged by the May 2012 Emilia-Romagna (Italy) seismic sequence is numerically analyzed by means of non linear static and dynamic FE techniques. The state of damage on the upper part of the structure led to take the decision to shorten the chimney for security reasons, with a reduction of the height up to 37 meters. A modal pushover analysis (MPA) where force distributions based on the principal vibration modes is used to analyze the structure, finding for the 50 meters case crack patterns consistent with the observed ones. In addition, it is shown how, before and after shortening, the behavior factor to be used in modal response spectrum analyses, estimated directly from the MPA results, is slightly higher than unity, indicating a very low dissipative capacity. To validate static approach results, non-linear dynamic analyses are carried out using natural accelerograms and for the masonry material a damage-plasticity model. The residual deformations obtained and the crack patterns found exhibit convincing similarities with the real behaviour and address how the shortening may be beneficial to improve stability.

000022403 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022403 653__ $$amasonry chimney; seismic-risk assessment; pushover; nonlinear analysis; vibration mode.

000022403 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022403 720__ $$aBertolesi, Elisa$$iTralli, Antonio$$iMinghini, Fabio$$iMilani, Gabriele$$iGrosso, Antonio Del
000022403 8560_ $$ffischerc@itam.cas.cz
000022403 8564_ $$s300295$$uhttp://invenio.itam.cas.cz/record/22403/files/C722.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022403 962__ $$r22030
000022403 980__ $$aPAPER