Akademik Veri Yönetim Sistemi
V. INTERNATIONAL SCIENTIFIC AND VOCATIONAL STUDIES CONGRESS – ENGINEERING (BILMES EN 2020), Tokat, Türkiye, 12 - 14 Aralık 2020, ss.118-126
In order to minimize the dynamic destructive effects that occur during an earthquake and to reduce the seismic risk, the soil and structure should be designed impeccably in terms of engineering. The most important of this design is determining the periods of the soil and structures. In terms of resonance, it is imperative to keep the soil and building period away from each other. In light of this information, it enables the building height and number of floors to be designed in advance in microzonation planning. Determining the building period by the microtremor method is a fast and non-destructive approach. In this study, a 6-storey building that was not designed (before 1999) in line with the current earthquake regulations province was examined. In this structure, at least 30 minutes microtremor measurements were performed on each floor from the basement to the sixth floor. At the same time, one-hour measurements were applied to determine the dominant period of the soil around the building. A 0.05-20 Hz band-pass filter was applied to the noise data to eliminate artificial effects and the data were evaluated by applying the SESAME criteria. In this study, it was aimed to determine the period values of the soil and the building. Dominant period and amplification factors were calculated with the Horizontal/Vertical Spectral Ratio (HVSR) technique named as Nakamura method. Indoor microtremor results performed on each floor show that the period of the building is approximately 0.33 second, and the measurement taken in the field shows that the period of the soil is approximately 2.85 second. It was observed that the amplification factor increased as the number of floors gradually increased from the basement to the sixth floor. Besides, it is seen that the period calculations performed practically from the building number of floors are not realistic.