1781 KB0 KB195120262019Dolšek, MatjažJamšek, Alešštevilka:letn. 68str. 268-278ISSN:0017-2774COBISSID_HOST:8973921URN:URN:NBN:SI:doc-DRMR1QWNslZveza društev gradbenih inženirjev in tehnikov SlovenijeGradbeni vestnikarmiranobetonska stavbafish-bone modelMDOF modelmodel MDOFmodel ribje kostipoenostavljen nelinearni modelpotisna analizapseudo-dynamic testpsevdo-dinamični testpushover analysisreinforced concrete buildingsimplified nonlinear modelPotresna analiza armiranobetonskih stavb s poenostavljenimi nelinearnimi modeli| Seismic analysis of reinforced concrete buildings with simplified nonlinear models|In the first part of the paper, we present the improved fish-bone (IFB) model for the seismic analysis of predominantly plan-symmetrical reinforced concrete frame buildings and develop a simplified nonlinear model for the analysis of a simple reinforced concrete (RC) wall-frame building, consisting of the IFB model and a model of a cantilever wall. The configuration of structural elements of the IFB model is equal to that of the basic fish-bone model, which is determined by a column to which beams are connected at both sides and in all storeys. The improvement of the basic fish-bone model refers to a new procedure for the estimation of the parameters of the structural elements, which allows to approximately account for the effect of the structural elements on the seismic response of a building. In the second part of the paper, we analyse the ability of simplified nonlinear models for seismic analysis. First, we show that the IFB model is sufficiently accurate to simulate the storey-based engineering demand parameters of a four-storey reinforced-concrete frame building, since the obtained results do not differ significantly from the results of the pseudo-dynamic test and the results of the seismic analysis performed with the conventional nonlinear model of RC building. Then follows the analysis of the capability of the simplified nonlinear models for pushover analysis of symmetric RC buildings, where we considered a four-storey RC frame building, an eight-storey frame building and an eight-storey wall-frame building. We found that the simplified models used in the analysis are sufficiently accurate for the calculation of the pushover curves and the storey-based damage assessment of structural elements. The use of the presented simplified nonlinear models is currently limited to the seismic analysis of plan-symmetrical buildings subjected to seismic excitation in one horizontal direction onlyV prvem delu prispevka predstavimo izboljšan model ribje kosti (model IFB) za potresno analizo pretežno tlorisno simetričnih okvirnih armiranobetonskih (AB) stavb in razvijemo poenostavljen nelinearni model enostavne AB-stenasto-okvirne stavbe, ki poleg modela IFB vključuje še model konzolne stene. Model IFB je glede na konfiguracijo elementov enak osnovnemu modelu ribje kosti, ki je določen s stebrom, na katerega sta v vsaki etaži priključeni še dve gredi. Izboljšava osnovnega modela ribje kosti se nanaša na postopek za določitev lastnosti konstrukcijskih elementov, s katerim lahko na približen način upoštevamo pomembnost konstrukcijskih elementov na potresni odziv stavbe. V drugem delu prispevka analiziramo sposobnost poenostavljenih nelinearnih modelov za potresno analizo. Najprej pokažemo, da je model IFB dovolj natančen za simulacijo etažnih parametrov potresnega odziva štirietažne okvirne ABstavbe, saj so dobljeni rezultati zelo podobni rezultatom psevdo-dinamičnega testa in rezultatom potresne analize, ki smo jo izvedli s konvencionalnim nelinearnim modelom AB-stavbe. Sledi še analiza primernosti poenostavljenih nelinearnih modelov za potisno analizo AB-stavb, pri kateri smo obravnavali štirietažno okvirno stavbo, osemetažno okvirno stavbo in osemetažno stenasto-okvirno stavbo. Ugotovili smo, da so uporabljeni poenostavljeni modeli dovolj natančni za izračun potisnih krivulj in poškodovanosti konstrukcijskih elementov na ravni etaž. Uporaba predstavljenih poenostavljenih nelinearnih modelov je trenutno omejena na potresno analizo tlorisno simetričnih stavb z obtežbo le v eni horizontalni smeriTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaZveza društev gradbenih inženirjev in tehnikov Slovenije