Effects of acceleration record selection on structures

Since many cities and structures are built near the fault, earthquake conditions and important factors affecting structures close to the fault should be examined for performance evaluation. In the field of earthquake engineering in recent years, the selection of the acceleration record has been one of the most important challenges facced by structural engineers when evaluating the seismic performance of structures. This study aims to investigate the effects of acceleration record selection with the method specified in 2018 Turkish Building Earthquake Code on Single Degree of Freedom Systems (SDOF Systems) representing mid- and high-rise reinforced concrete buildings. Fort his purpose, nonlinear dynamic analyses were used to determine displacement demands of SDOF Systems with different properties. In this study, 14 different models with periods between 0.2 and 2 (0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 0.9, 1, 1.2, 1.4, 1.6, 1.8 and 2s) were used. Six different base shear normalized by seismic weight ratios, 0.15, 0.2, 0.25, 0.30, 0.35 and 0.40, represent different building properties. Moreover, four different locations were ısed to represent spectrum for medium, high and very high level seismic activities on ZD soil class. As a result of the analyzes, the displacement demands, the average of the displacement demands and the standard deviation values in the acceleration record sets with different scaling coefficients were examined. The obtained results obviously show that the displacement demands are affected by the location, near and far field characteristics, period and base shear strength values. The outcomes illustrate that the record selection for scaling in accordance with the regulation spectrum is very important in case where there is near field effect depending on the location as the most important result within the scope of the study. Otherwise, there is a high probability of underestimating the displacement demands when the near field effect is not considered for the selection of ground motion records.