Refitting Equations for Peak Ground Acceleration in Light of the PF-L Database
The number of Ground Motion Prediction Equations (GMPEs) used for predicting peak ground acceleration (PGA) and the number of earthquake recordings that have been used for fitting these equations has increased in the past decades. The current PF-L database contains 3550 recordings. Since the GMPEs frequently model the peak ground acceleration the goal of the present study was to refit a selection of 44 of the existing equation models for PGA in light of the latest data. The algorithm Levenberg-Marquardt was used for fitting the coefficients of the equations and the results are evaluated both quantitatively by presenting the root mean squared error (RMSE) and qualitatively by drawing graphs of the five best fitted equations. The RMSE was found to be as low as 0.08 for the best equation models. The newly estimated coefficients vary from the values published in the original works.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1099202Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1195
 J. Douglas, “Ground motion prediction equations 1964-2010,” http://peer.berkeley.edu/globalgmpe/wpcontent/ uploads/2011/03/douglas2011_RP-59356-FR.pdf, 2011.
 I. Peruš and P. Fajfar, “Ground motion prediction by a non-parametric approach,” Earthquake Engineering and Structural Dynamics, vol. 39, no. 12, pp. 1395-1416, Oct. 2010.
 S. Markič and V. Stankovski, “An Equation-Discovery Approach to Earthquake-Ground-Motion Prediction,” Engineering Applications of Artificial Intelligence, vol. 26, no. 4, pp. 1339–1347, Jan. 2013.
 I. Peruš, P. Fajfar, “Prediction of site factors by a non-parametric approach,” Earthquake engineering and structural dynamics, (in print) 2014.
 I. Peruš, P. Fajfar. “Prediction of soil factors by a non-parametric approach,” 15th World Conference on Earthquake Engineering: Lisbon, Portugal. Sociedade Portuguesa do Engenharia Seísmica: International Association for Earthquake Engineering, 2012, pp. 1-10.