Evaluation of Motion Selection and Scaling for the Nonlinear Seismic Analysis of Concrete Gravity Dams

2017-10-13
Soysal, Berat Feyza
Ay, Bekir Özer
Arıcı, Yalın
The selection and scaling of the ground motions is usually the most effective factor determining the results of the safety assessment for concrete gravity dams. The guidelines for the nonlinear transient analyses of buildings, such as the one presented in ASCE/SEI-7-10, are generally applied to these structures. While these procedures are well-studied for the moment frames, their effectiveness and consistency has not been studied for gravity dam structures. The selection and scaling of the ground motions for use in the nonlinear seismic analysis of the concrete gravity dams was investigated in this study with a focus on the efficient prediction of the seismic demands on these structures. For a gravity dam monolith, 15 ground motions were used to evaluate the scaling procedures selected considering the local site conditions. The material nonlinearity, dam-reservoir interaction and vertical component of ground motions were considered in the analyses. The engineering demand parameters to quantify the seismic demands were selected as the crest displacement, the maximum crest acceleration and the crack extent, a direct indicator of the damage on the monoliths. In total, nine different commonly applied scaling methods were investigated. The effectiveness in the prediction of the mean demand and the corresponding dispersion levels were compared. The required number of motions to conduct effective analyses was determined.
4th International Conference on Earthquake Engineering and Seismology, (11 - 13 Ekim 2017)

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Citation Formats
B. F. Soysal, B. Ö. Ay, and Y. Arıcı, “Evaluation of Motion Selection and Scaling for the Nonlinear Seismic Analysis of Concrete Gravity Dams,” presented at the 4th International Conference on Earthquake Engineering and Seismology, (11 - 13 Ekim 2017), Eskişehir, Türkiye, 2017, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/78412.