GENERATION OF UNIFORM HAZARD EARTHQUAKE ACCELEROGRAMS AND NEAR-FIELD GROUND MOTIONS

The sets of records developed for the SAC Steel Project are classified according to the level of seismic hazard and specific geographic region, and have been used extensively for structural response and seismic hazard analyses. This study presents a parametric analysis of these record data sets for generation of uniform hazard earthquake and near-field records. The record parameters define far-field characteristics such as power spectral density and envelope function, and near-field effects such as acceleration pulse, power spectral density and envelope function. The proposed method for generation of near-field records uses the decomposing capabilities of wavelet transform on earthquake records. A set of uniform hazard earthquake accelerograms and near-field ground motions is generated based on the record parameters. The generated uniform hazard earthquake accelerograms representing a uniform level of seismic hazard for a particular geographic region involves seismic hazard studies, calibrated attenuation relationships, and local site amplification models. In order to assess the reliability and efficiency of the presented method, the statistical response spectra obtained from the generated accelerograms have been compared with those from the actual records. The obtained results showed that there is a good compatibility between the response spectra of the generated and actual records in the most of the frequencies.

[1]  G. N. Bycroft.  White Noise Representation of Earthquakes , 1960 .

[2]  K. T. Sundara Raja Iyengar,et al.  A nonstationary random process model for earthquake accelerograms , 1969 .

[3]  Abdollah Bagheri,et al.  Application of wavelet multiresolution analysis and artificial intelligence for generation of artificial earthquake accelerograms , 2008 .

[4]  Agathoklis Giaralis,et al.  Wavelet-based response spectrum compatible synthesis of accelerograms—Eurocode application (EC8) , 2009 .

[5]  Y. K. Wen,et al.  A Record-Based Method for the Generation of Tridirectional Uniform Hazard-Response Spectra and Ground Motions Using the Hilbert-Huang Transform , 2007 .

[6]  Sang Whan Han,et al.  Neural-network-based models for generating artificial earthquakes and response spectra , 2002 .

[7]  G. Ghodrati Amiri,et al.  New development of artificial record generation by wavelet theory , 2006 .

[8]  Goodarz Ahmadi,et al.  Nonstationary Kanai-Tajimi models for El Centro 1940 and Mexico City 1985 earthquakes , 1990 .

[9]  Qingshan Yang,et al.  Simulation method of near-fault pulse-type ground motion , 2007 .

[10]  Abdollah Bagheri,et al.  New method for generation of artificial ground motion by a nonstationary Kanai-Tajimi model and wavelet transform , 2007 .

[11]  Y. K. Wen,et al.  DESCRIPTION AND SIMULATION OF NONSTATIONARY PROCESSES BASED ON HILBERT SPECTRA , 2004 .

[12]  George P. Mavroeidis,et al.  A Mathematical Representation of Near-Fault Ground Motions , 2003 .

[13]  J. Iyama,et al.  Application of wavelets to analysis and simulation of earthquake motions , 1999 .

[14]  Abdollah Bagheri,et al.  Simulation of earthquake records using combination of wavelet analysis and non-stationary Kanai-Tajimi model , 2009 .

[15]  P. C. Jennings,et al.  Simulated earthquake motions , 1968 .

[16]  Vinay K. Gupta,et al.  Wavelet‐based characterization of design ground motions , 2002 .

[17]  Goodarz Ahmadi,et al.  Generation of artificial earthquake records with a nonstationary Kanai–Tajimi model , 2001 .

[18]  Jamshid Ghaboussi,et al.  New method of generating spectrum compatible accelerograms using neural networks , 1998 .

[19]  Jamshid Ghaboussi,et al.  Generating multiple spectrum compatible accelerograms using stochastic neural networks , 2001 .

[20]  Luis E. Suarez,et al.  Generation of artificial earthquakes via the wavelet transform , 2005 .

[21]  JONATHAN HANCOCK,et al.  AN IMPROVED METHOD OF MATCHING RESPONSE SPECTRA OF RECORDED EARTHQUAKE GROUND MOTION USING WAVELETS , 2006 .

[22]  Pierfrancesco Cacciola,et al.  A stochastic approach for generating spectrum compatible fully nonstationary earthquakes , 2010 .

[23]  Vinay K. Gupta,et al.  WAVELET-BASED GENERATION OF SPECTRUM COMPATIBLE TIME-HISTORIES , 2002 .

[24]  Henri P. Gavin,et al.  Generation of Uniform-Hazard Earthquake Ground Motions , 2011 .

[25]  Masanobu Shinozuka,et al.  Simulation of Nonstationary Random Process , 1967 .

[26]  K. Bargi,et al.  Stochastic modeling of Iranian earthquakes and estimation of ground motion for future earthquakes in Greater Tehran , 2009 .

[27]  G. Ghodrati Amiri,et al.  Generation of Multiple Earthquake Accelerograms Compatible with Spectrum Via the Wavelet Packet Transform and Stochastic Neural Networks , 2009 .