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

Date

2017-10-13

Author

Soysal, Berat Feyza
Ay, Bekir Özer
Arıcı, Yalın

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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.

Subject Keywords

Ground motion selection, Ground motion scaling, Nonlinear analysis, Concrete gravity dam, Damage level, Yer hareketi seçimi, Yer hareketi ölçeklemesi, Doğrusal olmayan analiz, Beton ağırlık barajı, Hasar seviyesi

URI

https://hdl.handle.net/11511/78412
http://www.tdmd.org.tr/TR/Genel/4UDMSK/pdf2017/3291.pdf

Conference Name

4th International Conference on Earthquake Engineering and Seismology, (11 - 13 Ekim 2017)

Collections

Department of Civil Engineering, Conference / Seminar

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Evaluation of the Ground Motion Scaling Procedures for Concrete Gravity Dams SOYSAL, BERAT FEYZA; Ay, Bekir Özer; Arıcı, Yalın (Elsevier BV; 2017-09-13) The seismic safety of dam structures is often evaluated using time history analyses conducted with a limited number of ground motions. The selection and scaling of the ground motions is usually the most effective factor determining the results of the safety assessment. The inherent variability in the ground motion as well as the difficulty of conducting the analyses for a large number of ground motions renders the selection as the most important factor in the analysis results. The guidelines for the nonline...
An Investigation of the Ground Motion Scaling Procedures for the Nonlinear Seismic Analyses of Concrete Gravity Dams Soysal, BERAT FEYZA; Ay, Bekir Özer; Arıcı, Yalın (2019-07-03) Seismic assessment of gravity dams is generally carried out using time history analyses. Scaling of the motions is commonly used; however, in contrast to buildings, the performance of scaling procedures at predicting the mean and reducing the dispersion in engineering demand parameters (EDPs) is not known. The main goal of this study is to assess the performance of different scaling procedures in predicting seismic demands on dams. The performance regarding the prediction of the damage and the required numb...
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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.