Abstract:

New Turkish Building Earthquake Code (TBDY-2018) has come into force on 01 January 2019 and one of the most important innovation brought by the regulation is the calculation of earthquake ground spectra, according to location of the building and its ground parameters. Purpose of this study is to investigate the effects of this important modification on the forces acting on the structure and the change in the displacement values occurring in the structure. In the first part of the study, according to both regulations (TDBY-2018 and Turkish Earthquke Code 2007 (TDY-2007)), principles of base shear force and the maximum relative storey drifts of buildings are given. For numerical analysis, Sakarya-Serdivan, Kocaeli-Kandıra, Eskişehir-Sivrihisar and Ankara-Yenimahalle locations were determined in the earthquake hazard map of 1996, respectively in the 1st, 2nd, 3rd and 4th earthquake regions. Considering 4 different soil types in each designated location, three different storey buildings (4, 7 and 10 floors) have been created. Analyses were performed according to TBDY-2018 and TDY-2007 for the design earthquake with the help of IDECAD structural analysis program. Thus obtained structure base shear forces and relative storey drift values presented with tables and graphs. According to the results, it was observed that the base shear forces gives lower values compared to the old building code as the number of storey increases, and the maximum relative storey drift gives much higher values than the old building code, especially when the soil types changes from hard to soft conditions.

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