Methodology_for_Estimating_Seismic_Coefficients_for_Performance-Based_Design_of_Earth_dams_and_Tall_ - METHODOLOGY FOR ESTIMATING SEISMIC COEFFICIENTS

Methodology_for_Estimating_Seismic_Coefficients_for_Performance-Based_Design_of_Earth_dams_and_Tall_

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1 METHODOLOGY FOR ESTIMATING SEISMIC COEFFICIENTS FOR PERFORMANCE-BASED DESIGN OF EARTHDAMS AND TALL EMBANKMENTS Achilleas G. Papadimitriou Assistant Professor, Department of Civil Engineering, University of Thessaly, Greece George D. Bouckovalas Professor, Geotechnical Department, School of Civil Engineering, National Technical University of Athens, Greece Konstantinos I. Andrianopoulos Post-Doctoral Researcher, Geotechnical Department, School of Civil Engineering, National Technical University of Athens, Greece Paper submitted for publication to Soil Dynamics and Earthquake Engineering Text + 1 Table & 15 Figures KEYWORDS: earthdams, earthquake, embankments, non-linear soil response, numerical analysis, performance-based design, pseudo-static analysis, sliding block, slope stability CONTACT ADDRESS: Achilleas Papadimitriou Department of Civil Engineering University of Thessaly Pedion Areos, 38334, Volos, Greece Tel. +30-24210-74140 Fax. +30-24210-74169 Email. [email protected] Web.
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2 METHODOLOGY FOR ESTIMATING SEISMIC COEFFICIENTS FOR PERFORMANCE-BASED DESIGN OF EARTHDAMS AND TALL EMBANKMENTS Achilleas G. Papadimitriou 1 , George D. Bouckovalas 2 Konstantinos I. Andrianopoulos 3 Abstract Following an overview of pertinent literature, this paper presents a new methodology for estimating seismic coefficients for the performance-based design of earth dams and tall embankments. The methodology is based on statistical regression of (decoupled) numerical data for 1084 potential sliding masses, originating from 110 non-linear seismic response analyses of 2D cross sections with height ranging from 20 to 120m. At first, the methodology estimates the peak value of the seismic coefficient k hmax as a function of: the peak ground acceleration at the free field, the predominant period of the seismic excitation, the non-linear fundamental period of dam vibration, the stiffness of the firm foundation soil or rock layer, as well as the geometrical characteristics and the location (upstream or downstream) of the potentially sliding mass. Then, it proceeds to the estimation of an effective value of the seismic coefficient k hE , as a percentile of k hmax , to be used with a requirement for pseudo- static factor of safety greater or equal to 1.0. The estimation of k hE is based on allowable permanent down-slope deviatoric displacement and a conservative consideration of sliding block analysis. Keywords — earthdams, earthquake, embankments, non-linear soil response, numerical analysis, performance-based design, pseudo-static analysis, sliding block, slope stability 1 Assistant Professor, Department of Civil Engineering, University of Thessaly, Greece, < [email protected] > 2 Professor, Department of Geotechnical Engineering, School of Civil Engineering, National Technical University of Athens, Greece, < [email protected] > 3 Post-Doctoral Researcher, Department of Geotechnical Engineering, School of Civil Engineering, National Technical University of Athens, Greece, < [email protected] >
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3 1. INTRODUCTION
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  • Winter '16
  • George Bouckovalas
  • Civil Engineering, Earthquake engineering, PGA, Dam, S-wave

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