Assessment of the Torsion Effect in Asymmetric Buildings under Seismic Loading

According to the recent earthquakes, the asymmetric buildings suffer from severe damages caused by increased torsional response. The new seismic codes try to take into account this effect and during the modeling it is difficult to assess all the parameters that have an influence on the behavior of this kind of structures. In this work, a study on the influence of the effects of torsion on the behavior of structure is done. The proposed structures consist of an irregular 3-storey reinforced concrete frame with infinitely rigid slabs. The uncertainties of input parameters, such as seismic Arias intensity, peak ground acceleration, predominant period and output ones such as, inter-story Drift, and dynamic eccentricity upon the torsion is investigated. Using a finite element code, dynamic linear and non linear time analysis and pushover analysis have been performed, based on 116 seismic records with a magnitude varying between 6.2 and 7.7.

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