Ground motion scaling for the prediction of the seismic response of concrete gravity dams


Thesis Type: Postgraduate

Institution Of The Thesis: Orta Doğu Teknik Üniversitesi, Faculty of Engineering, Department of Civil Engineering, Turkey

Approval Date: 2014

Student: MUSTAFA BERK DUYGU

Supervisor: YALIN ARICI

Abstract:

Designing dams for seismic safety gains importance as the number of dams are increasing as a result of increasing need in water storage and hydropower. To define a structure’s seismic safety, scaling of accelerograms should be considered as one of the most crucial elements. Appropriate scaling of ground motion records is required to better estimate the linear and nonlinear structural response of a structure. Although, in literature, there exist numerous methods dealing with this issue, it is required to determine the most suitable ones for designing concrete gravity dams. In this study, in order to compare the effectiveness of different ground motion scaling procedures, four different ground motion scaling procedures were used. The scaling methods used in this thesis are namely, non-stationary spectral matching, scaling for ASCE-7-10, scaling of records to arithmetic mean of maximum incremental velocity and Modal Pushover Based Scaling. The two dimensional Concrete Gravity Dam models are analyzed by utilizing non-linear dynamic analyses for the selected and scaled records.