PARAMETRIC STUDY OF THE INFLUENCE OF MASONRY INFILL ON THE BEHAVIOUR OF REINFORCED CONCRETE SKELETON STRUCTURE

Prikazana je parametarska analiza armiranobetonskog okvira s ispunom izloženog djelovanju potresa kako bi se pokazalo da ne vrijedi uvriježena pretpostavka da se zidani ispun može zanemariti. Zidani ispun se ne uzima u obzir ili se u potpunosti izostavlja, a cilj rada je utvrditi utjecaj zidanog ispuna. Odabrana konstrukcija predstavlja tipsku konstrukciju karakterističnu za područje Slavonije. Razrađeno je više modela, od kojih osnovni bez zidanog ispuna i tri modela sa zidanim ispunom modeliranim na tri različita načina. Varirani su načini modeliranja zidanog ispuna i stupanj diskretizacije modela. Dobiveni su momenti savijanja i poprečne sile na stupovima, te pomaci konstrukcije. Rezultati su pokazali da zidani ispun dovodi do redukcije pomaka preko povećanja krutosti konstrukcije, te da bi se pri analizi konstrukcija trebao uključiti zidani ispun. Korišteni su sljedeći programi: SAP2000 i SeismoSignal.The analysis of a reinforced-concrete frame with masonry infill subjected to seismic action was undertaken to demonstrate the invalidity of the widely accepted assumption that the masonry infill can be disregarded. Masonry infill is not taken into consideration or is completely disregarded. The main goal of this paper is to determine the influence of the masonry infill. The selected structural frame represents the typical construction type for Slavonia. Multiple models were made, single basic model without the infill and three models with the infill modelled in different ways. Modelling of the masonry infill was varied with different level of detail. The seismic response values were obtained. Results show that the inclusion of the masonry infill leads to increase in stiffness which in term leads to the reduction of the displacements, which means the masonry infill should be included in the analysis of the structure. Following software was used: SAP2000 and SeismoSignal