000015603 001__ 15603
000015603 005__ 20161115135324.0
000015603 04107 $$aeng
000015603 046__ $$k2013-06-12
000015603 100__ $$aPolese, M.
000015603 24500 $$aSeismic Behavior of Damaged Buildings: a Comparison of Static and Dynamic Nonlinear Approach

000015603 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015603 260__ $$bNational Technical University of Athens, 2013
000015603 506__ $$arestricted
000015603 520__ $$2eng$$aSeismic behavior of damaged buildings may be expressed as a function of their REsidual Capacity (RECag), that is a measure of seismic capacity “reduced” due to damage and represented in terms of peak ground acceleration ag. RECag may be estimated through pushover analyses. In fact, adopting a lumped plasticity model, the plastic hinges may be suitably modified to account for the damage level of the single elements [1]; as shown in [2] nonlinear static analyses of the modified damaged models yield pushover curves that, depending on the number of elements involved in the damaged mechanism and on their damage level, may differ significantly with respect to original ones. The applicability of Pushover Analyses (PA) has been demonstrated for regular structures [3, 4], with their significance being generally supported by the comparison of the results obtained by these “simplified” analyses with Nonlinear dynamic Time-History (NTH) analyses. However, the usability of pushover analysis for the assessment of the behavior of damaged buildings has not been verified yet, and the study presented in this paper aims at contributing in the evaluation of this issue. The results of PA are confronted with those of NTH for Multi Degree Of Freedom (MDOF) systems representative of existing R.C. building typologies in the Mediterranean regions. In particular, the response (and damage) of each one of the original “intact” MDOF systems for earthquakes of increasing intensity is studied with either the PA and NTH. Next, applying the methodology described in [2], damage dependent behavior is estimated for varying levels of initial seismic (damaging) intensity. The maximum inter-storey drift and shape along the height, as well as the “modified” RECag are compared to the ones that could be obtained with NTH by subsequent application of suitably scaled pairs of accelerograms. The results of this study suggest that degree of approximation that is obtained by PA applied to damaged structures with respect to NTH does not vary with respect to the approximation of standard PA compared to NTH.

000015603 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015603 653__ $$aresidual capacity, damaged building, pushover analysis, nonlinear time history analysis, post-earthquake assessment, reinforced concrete frame.

000015603 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015603 720__ $$aPolese, M.$$iGaetani, D'A-M.$$iProta, A.$$iManfredi, G.
000015603 8560_ $$ffischerc@itam.cas.cz
000015603 8564_ $$s1026850$$uhttps://invenio.itam.cas.cz/record/15603/files/1134.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 11 PROBALISTIC METHODS IN DESIGN AND ASSESSMENT OF STRUCTURES: CONCEPTS AND APPLICATIONS
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000015603 962__ $$r15525
000015603 980__ $$aPAPER