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Buildings that have been subjected to seismic impacts must initially be assessed. The assessment is done in order to determine the degree of damage to buildings. Defining the method of intervention depends on the assessment. Generally, the assessment can be done using Eurocode norms, ACI, SIA, etc. The assesment of buildings determines the ability of buildings to be durable, even against a new possible earthquake of the same magnitutde or even stronger. The assessment should result in clear decision which buildings are close to collapse, and which are suitable for an intervention. Assessments should also take into account the importance of buildings such as historical, cultural, public, etc.

U radu je prikazan proračun postojeće zgrade s dvoetažnom nadgradnjom. Proveden je potresni proračun triju modela i analizirana uključenost starog betona u nosivost. Za potrebe proračuna korišteni su rezultati ispitivanja betona postojeće konstrukcije te geomehanička ispitivanja temeljnog tla. Primjer prikazan u radu služi kao polazište za definiranje programa istraživanja kojim bi se razradila metodologija za analizu u slučaju nadogradnje, osobito kroz istraživanja zajedničkog djelovanja stare i nove konstrukcije.

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