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- W2182804252 abstract "Seismic behavior of damaged buildings may be expressed as a function of their REsidual Capacity (REC ag ), that is a measure of seismic capacity reduced due to damage and represented in terms of peak ground acceleration a g. REC ag may be estimated through pushover analyses. In fact, adopting a lumped plasticity model, the plastic hinges may be suitably to account for the damage level of the single elements (1); as shown in (2) nonlinear static analyses of the damaged models yield pushover curves that, depend- ing 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 gener- ally supported by the comparison of the results obtained by these simplified analyses with Nonlinear dynamic Time-History (NTH) analyses. However, the usability of pushover analy- sis 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 rep- resentative 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 earth- quakes 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 REC ag 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 struc- tures with respect to NTH does not vary with respect to the approximation of standard PA compared to NTH." @default.
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- W2182804252 date "2014-01-01" @default.
- W2182804252 modified "2023-10-03" @default.
- W2182804252 title "SEISMIC BEHAVIOR OF DAMAGED BUILDINGS: A COMPARISON OF STATIC AND DYNAMIC NONLINEAR APPROACH" @default.
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- W2182804252 doi "https://doi.org/10.7712/120113.4545.c1134" @default.
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