Неке анализе конструкција бетонских зграда на сеизмичка дејства

Abstract

U radu se analiziraju metode prora una perioda vibracija vi espratnih betonskih zgrada. Pri tome komentarisane su preporuke Evropskih normi EN 1998-Deo 1 i neki literaturni podaci. Komentarisani su razli iti koncepti projektovanja seizmi ki otpornih betonskih konstrukcija, uklju iv i kori enje metode pritisnutih tapova i zatega. Analizirani su razli iti tipovi konstrukcija: okvirne, kao i zgrade sa nose im zidovima sa i bez otvora. Na jednom primeru vi espratne zgrade sa regularnom i neregularnom konfiguracijom data je uporedna analiza rezultata prora una. Pokazano je da pribli ne metode (metoda ekvivalentnih bo nih sila) po pravilu daju znatno ve e vrednosti uticaja u konstrukciji nego ta nije metode (multimodalna spektralna). Iz uporedne analize proistekle su odgovaraju e preporuke za primenu metoda prora una konstrukcija zgrada, zavisno od njihove regularnosti.

The paper analyses methods of computing vibration periods of high-rise concrete buildings. Therefore, the recommendations of European norms EN 1998-Part 1 are commented as well as some literature data. Different concepts of designing seismically resistant concrete structures are discussed including the application of the ties - strut method. Different types of structures are analysed: frames, and buildings with bearing walls with and without openings. A comparative analysis of the calculation results is given on an example of a high-rise building with regular and irregular configuration. It is shown that approximate methods (the method of equivalent lateral forces) as a rule give higher values of influences in the structure than more accurate methods (the multimodal spectral method). From the comparative analyses arise corresponding recommendations on the implementation of methods for the calculation of structures of buildings, depending on their regularity.