000015830 001__ 15830
000015830 005__ 20161115135331.0
000015830 04107 $$aeng
000015830 046__ $$k2013-06-12
000015830 100__ $$aPolese, M.
000015830 24500 $$aMechanism Based Assessment of Damaged Building's Residual Capacity

000015830 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015830 260__ $$bNational Technical University of Athens, 2013
000015830 506__ $$arestricted
000015830 520__ $$2eng$$aSeismic behavior of damaged buildings may be expressed as a function of their REsidual Capacity (REC). The residual capacity RECSa is defined as the minimum spectral acceleration (at the period Teq of the equivalent SDOF) corresponding to building collapse. When referring to peak ground acceleration ag as damaging intensity parameter, RECag is defined as the minimum anchoring peak ground acceleration such as to determine building collapse. For a given spectral shape, RECag corresponds to RECSa scaled by the spectral amplification factor for Teq. RECSa and RECag, generally indicated as REC, lower with increasing damage level in buildings; hence REC may be very useful in estimating the post-seismic building safety. In a recent work [1] it has been shown how it is possible to derive REC (RECSa and RECag) through Pushover Analyses (PA), where a suitable modification of plastic hinges for damaged elements is applied. The applicability of PA for damaged structures is verified in [2] by comparison of the PA results with those on nonlinear time-history analyses. On the other hand, it is unrealistic that in the aftermath of an earthquake, when the assessment of building safety has to be performed in an emergency situation, there would be time for the execution of detailed nonlinear analyses. Acknowledging the need for easier and faster evaluation tools, in [3] a simplified MEChanism based method (MEC) for evaluating the building REC was preliminary tested. The present work extends the comparison of the results (in terms of REC), that could be obtained by PA and MEC analyses, considering a number of Reinforced Concrete (RC) frames building typologies. Moreover, by adopting the MEC approach, the possible variation of REC as a function of seismic demand is investigated. The simplified method can be used to explore the possible ranges of REC variation for RC building classes considering the anticipated mechanism formation after an earthquake; in addition, it could be used in the post-seismic phase for estimating the REC of damaged buildings having undergone identifiable plastic mechanisms and for fast assessment of damage-dependent collapse fragility curves.

000015830 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015830 653__ $$aresidual capacity, damaged building, capacity spectrum method, damage dependent vulnerability, post-earthquake assessment, collapse fragility curves.

000015830 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015830 720__ $$aPolese, M.$$iMarcolini, M.$$iProta, A.$$iZuccaro, G.
000015830 8560_ $$ffischerc@itam.cas.cz
000015830 8564_ $$s637916$$uhttps://invenio.itam.cas.cz/record/15830/files/1524.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-RS 16 PERFORMANCE-BASED ENGINEERING
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000015830 962__ $$r15525
000015830 980__ $$aPAPER