Earthquake Behavior of Berke Arch Dam Using Ambient Vibration Test Results
Publication: Journal of Performance of Constructed Facilities
Volume 26, Issue 6
Abstract
The Berke Arch Dam is the highest arch dam constructed in Turkey. The dam height is 201 m, and the crest length is 270 m. This paper describes the Berke Arch Dam, its finite-element modeling, ambient vibration testing, finite-element model calibration, and earthquake behavior before and after model calibration. First, three-dimensional (3D) models of dam-reservoir-foundation interaction were developed to obtain analytical dynamic characteristics, such as natural frequencies and mode shapes using the Ansys finite-element program. In the analyses, reservoir water was represented by a Lagrangian approach. Then, ambient vibration tests were conducted on the dam on 4 days in May 2009 to obtain experimental dynamic characteristics. In ambient vibration tests, the sensitive accelerometers were placed on several points on the arch dam, and signals were collected from accelerometers. The enhanced frequency domain decomposition technique was used in the extraction of experimental natural frequencies, mode shapes, and damping ratios. After that, 3D finite-element models of the Berke Arch Dam were calibrated using ambient vibration test results. Finally, earthquake behaviors of initial and calibrated models of the Berke Arch Dam were obtained using the Adana-Ceyhan Earthquake in 1998. It was observed that model calibration affects the results considerably.
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Acknowledgments
This research was supported by the TUBITAK and Karadeniz Technical University under Research Grant Nos. 106M038 and 2006.112.001.1, respectively. We thank Bülent Selek and İsmail Kaya, who are the engineers in the 6th General Directorate of State Hydraulic Works, and Nevzat Erdem, M. Sadi Ankin, and the Electricity Generation Corporation Company workers for their help.
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Published In
Journal of Performance of Constructed Facilities
Volume 26 • Issue 6 • December 2012
Pages: 780 - 792
Copyright
© 2012 American Society of Civil Engineers.
History
Received: May 15, 2010
Accepted: Aug 1, 2011
Published online: Aug 3, 2011
Published in print: Dec 1, 2012
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