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SHAKE2000
Update History
Version 3 (USB Hardware Key required):
January 2008 (Version 3.5.0): In this update: 1) the Bray & Travasarou routine has been revised to reflect the intended purpose of the authors when computing the 16% and 84% exceedance levels; and 2) the Toro & Silva attenuation relations have been updated.
December 2007 (Version 3.4.0): In this update: 1) A bug on the Bray & Travasarou routine is fixed; 2) For European users, the routine for the RspMatch Editor is fixed to save the input data using "." instead of "," for the decimal part.
August 2007 (version 3.3.0): In this update: 1) the Next Generation Attenuation of Ground Motion relations have been updated and the preliminary relation by Abrahamson & Silva included based on the most recent information provided in the PEER website; 2) the simplified method for estimating earthquake-induced deviatoric slope displacements by Bray and Travasarou (2007) has been included in the program.
July 2007 (version 3.2.0): In this update the preliminary 2007 Seismic Hazard Values used to create the 2007 USGS National Seismic Hazard Maps for the USA have been added as an option.
June 2007 (version 3.1.0): In this update the preliminary Next Generation Attenuation of Ground Motion relations by Idriss, Campbell & Bozorgnia, Atkinson & Boore, and Chiou & Youngs have been included in the program based on the most recent information provided in the PEER website.
Version 2:
- In this update: 1) the number of layers has been increased from 50 to 200. Please note that increasing the number of layers does not overcome the depth limitations commonly recommended for SHAKE. And, 2) the help files have been updated to include the latest modifications to the user's manual.
April 2007:
January 2007: In this update: 1) the attenuation relation by Atkinson and Boore for ENA has been updated based on a recently published paper in the Bulletin of the Seismological Society of America, Vol. 96, No. 6, December 2006; and, 2) the help files have been updated to include the latest modifications to the user's manual.
December 2006: In this update: 1) A bug when using the overburden fill option in the CSR form has been corrected, this bug made the program crash when this option was being used; 2) A bug in the attenuation relation for Cambell and Bozorgnia has been fixed when plotting the attenuation for a specific period, this bug caused the attenuation relation for different periods to be the same as the attenuation relation for PGA, but it did not affect the results of the response spectrum or the PGA attenuation computation; and, 3) a bug in the ratio of response spectrum option has been fixed that caused the program to display less curves than the total number of curves available, however, the results computed were still valid.
October 2006: In this update: 1) the help pages are now shown using Acrobat Reader, or the default *.PDF program; 2) the CRR analysis using CPT data has been updated based on information recently published in the May 2006 and August 2006 issues of the Journal of Geotechnical and Geoenvironmental Engineering; 3) the approach used to compute the total and effective stresses when using SPT, CPT or Vs data has been modified to compute the values instead of interpolating them; and 4) the attenuation data and the code spectra can now be saved to a text file for further use.
August 2006: In this update: 1) a pre- & post-processor for RSPMATCH is included. Please note that a copy of the RSPMATCH program IS NOT INCLUDED with the update; and, 2) some minor bugs have been fixed.
April 2006: In this update: 1) the routine used to compute a mean response spectrum has been revised. A few bugs have been corrected. The routine will perform faster as the response spectrum will only be computed once. The misfit is now evaluated using the Mean Square Error; and, 2) the G/Gmax and Damping Ratio vs. strain curves for waste material by Kavazanjian & Matasovic (1998) have been revised. The source used to obtain the curves included in the database did not provide the correct data. Information on how to update the dynamic material properties database file is included in the G/Gmax Cuves - Database or Damping Ratio Curves - Database sections of the Help file or the User's Manual.
March 2006: In this update: 1) Two new attenuation relations have been added by Ambraseys & Douglas (2003) for near-field events and by Tavakoli & Pezeshk (2005) for Eastern North America; 2) The SEA99 attenuation relation by Spudich et al. has been updated based on information presented by Pankow & Pechmann (2004); and, 3) The liquefaction analysis method using CPT by Juang et al., has been updated based on recent information presented by Juang et al. (2006). More detailed information on these changes is included in the help file.
February 2006: In this update: 1) a new option has been added to the simplified cyclic stress ratio to add a "surcharge fill" load for the analysis of liquefaction; 2) an option to transform the USGS B/C motion to a Hard Rock, i.e. rock type A, motion has been added to the Conversion of Ground Motion File form; and, 3) a number of bugs in the random generation of EDT data routine have been fixed. These bugs occurred when working with the SI units version of the program, but would not affect the results.
September 2005: In this update: 1) a number of bugs have been fixed on the random generation of EDT data routine. These bugs would not affect the results, but would crash the problem when they occurred; 2) the acceleration, velocity and displacement time histories obtained from a Newmark Analysis are now saved in a text file; 3) a user defined response spectrum can be imported for use in the Makdisi-Seed displacement method.
August 2005: In this update: 1) a new model to estimage liquefaction-induced ground deformation has been added (Jian Zhang and John X. Zhao (2005). Empirical models for estimating liquefaction-induced lateral spread displacement. Soil Dynamics and Earthquake Engineering, Vol. 25, pp. 439-450, August 2005); and, 2) a number of bugs on the random generation of EDT data routine have been fixed. These bugs would prevent the creation of the input file if data for the Option 3 were not included in the random generation, thus, SHAKE would have not executed and there would not be loss of data as a result of the bugs.
July 2005: In this update: 1) a number of models to generate shear modulus reduction and damping ratio vs. strain curves are included in Option 1; 2) the data for the attenuation relation by Boore et al. (1997) have been updated based on recently published information; 3) the attenuation relation by Ambraseys et al. for Europe and the Middle East has been updated; 4)the random generation of EDT data has been modified to generate data based on normal and ln/log normal distributions; 5) the mean +- standard deviation curves from the random generation of data are now plotted; and, 6) a few bugs have been fixed that will occur if neither Option 5 nor Option 6 data were used in the analysis.
May 2005: This update fixes a couple of bugs found in the Random Generation feature of SHAKE2000. These bugs would have probably crashed the program, thus, no erroneous results would have been obtained from using this feature of the program.
April 2005: In this update: 1) A new ground motion attenuation relation for Europe by Bommer, Douglas and Strasser (2003); 2) The NEHRP spectra have been updated according to the NEHRP Recommended Provisions 2003 Edition; 3) A feature to randomly generate Options 1, 2 and 3 has been included that can be used to conduct a "crude sensitivity analysis" to evaluate the effect of the variability of the input data on the results of a site response analysis; and, 4) A feature to compute the ratio of response spectrum, RRS, that can be used to compute the ratio of the ground surface motions to the input outcropping rock motions. The results of the analysis can be used to obtain a soil response spectrum by multiplying either the mean or the median curve of the resultant RRS curves by a rock response spectrum. Further information about these and other minor changes is provided in the Help file. The updated User's Manual includes a tutorial section on the use of the new Random Generation and Ratio of Response Spectrum features of the program.
January 2005: In this update: 1) liquefaction analysis using SPT according to the Cetin et al. method has been reviewed to incorporate minor changes recently published by Cetin et al., 2004; and, 2) for international users, the program has been modified to save the data files for SEISRISK III and SIMQKE using periods instead of commas as the decimal separator.
November 2004: In this update: 1) three new ground motion attenuation relations are added to the program: for Cascadia Subduction Zone megathrust earthquakes by Gregor, Silva, Wong and Youngs (2002); for Central and Eastern North America by Silva, Gregor and Darragh (2002); and, an attenuation relation by Idriss, I.M. (2002); and, 2) the method to estimate liquefaction-induced lateral displacements using the method developed by Zhang et al. (2004) is extended to work with Standard Penetration Test data.
October 2004: In this update a new method to estimate liquefaction-induced lateral displacements using the Cone Penetration Test is included. This feature follows the method developed by Zhang et al. (2004).
September 2004: In this update: 1) a few bugs on the editor routines for SEISRISK III have been fixed; and, 2) the EPRI (1993) set of modulus reduction and material damping curves are included. To update the dynamic material properties, use the Dbase command button on the Option 1 form, and then the Update command button on the G/Gmax Curves Database or on the Damping Ratio Curves Database form. You can access the Option 1 form from either a new or an existing EDT file.
August 2004 II: This update includes: 1) a new option to enter the angle of inclination for CPT borings; 2) a new option on the average CPT form to obtain a graph of state parameter vs. depth; and, 3) a few bugs on the editor routines for SEISRISK III have been fixed.
August 2004: This update includes: 1) a new feature to plot the hazard matrix, i.e. the results of seismic hazard deaggregation for a site in the Conterminous United States obtained from the USGS web site. The data in this text file are used by SHAKE2000 to obtain a plot of the deaggregated distance, magnitude and ground-motion uncertainty for the specified parameters; 2) a pre & postprocessor for SEISRISK III is now included in SHAKE2000 (an example showing the use of the SEISRISK III pre & postprocessor is included in the tutorial section of the updated User's Manual that can be downloaded below); 3) a set of normalized modulus reduction and material damping curves presented by Roble and Chiou (2004); and, 4) the latest SI version of the program. To update the dynamic material properties, use the Dbase command button on the Option 1 form, and then the Update command button on the G/Gmax Curves Database or on the Damping Ratio Curves Database form. You can access the Option 1 form from either a new or an existing EDT file.
May 2004 - Update II: In this update: 1) the requirement that the minimum unit weight value accepted by the program be greater than the unit weight of water has been changed in order to accept values for materials such as waste; 2) a number of bugs have been fixed that may cause the program to cancel the CSR analysis when resetting the data on the CRR form; and, 3) additional changes have been made to ease the transition of the program to next version of the software that will include the SI/English Units version.
May 2004 - Update: In this update: 1) a new attenuation relationship by Ambraseys, N.N., Simpson, K.A., and Bommer, J.J. (1996) for the active regions of Europe was added; and, 2) some minor changes have been made to ease the transition of the program to next version of the software that will include the SI/English Units version.
April 2004 - Update II: In this update: 1) the equation developed by Cetin and Seed used to calculate the stress reduction factor (rd) has been updated based on recently published information (Soil Dynamics and Earthquake Engineering, Volume 24, February 2004); and, 2) some minor changes have been made to ease the transition of the program to the SI/English Units version.
April 2004 Update: In this update: 1) the routine used to compute the predominant spectral period of a ground motion has been modified to use the acceleration response spectrum instead of the Fourier spectrum, further, the smoothed predominant and average periods are also computed as recommended by Rathje et al. (2004); 2) the computation of response spectra is now conducted for a series of period values having a uniform spacing, further, four options for the number and spacing of the period values have been included; 3) the use of the term Mean on the attenuation relation and graphics forms has been changed to Median to reflect the correct use of the latter on attenuation relations; and, 4) a bug has been fixed on the liquefaction-induced ground deformation form which required the user to enter values for every term before using any model.
March 2004 Update: In this update: 1) a new attenuation relation by Berge-Thierry, et al. for Moderate European Earthquakes is included; 2) a new option is added to the Toro et al. attenuation relations to account for extended-source effects; 3) two recently published methods for liquefaction analysis using CPT data by Idriss & Boulanger and by Robb E. Moss are added; 4) the routine to read CPT data files has been modified to provide more flexibility when editing the data manually; and, 5) the baseline correction method used to correct ground motion files has been modified and a new feature has been included that allows the user to save a copy of the computed velocity and displacement time histories to a file.
January 2004 Update: In this update: 1) a new feature is included in Option 1 that allows the user to add dynamic material properties to the database file. We will post a file that includes dynamic material properties obtained from published literature or from other users of the program. This update includes a set of normalized modulus reduction and material damping curves presented by Darendeli, Mehmet B. (2001); 2) a data file used by the "Liquefaction-Induced Ground Deformation" option is updated. This file may not have been installed properly during the previous update. If the file was not properly installed, the likely result is an error message when trying to use the "Liquefaction-Induced Ground Deformation" option of the Main Menu; and, 3) the thin layer correction in the CPT routine has been modified to conduct the correction before the layers are depth-averaged or to conduct the correction even if depth averaging is not required. To update the dynamic material properties, use the new Dbase command button on the Option 1 form, and then the Update command button on the G/Gmax Curves Database or on the Damping Ratio Curves Database form. You can access the Option 1 form from either a new or an existing EDT file.
December 2003 Update: In this update: 1) the Atkinson & Boore and Bozorgnia & Campbell attenuation relations are updated based on recently (August 2003) published information; 2) new attenuation relations by Sabetta & Pugliese for Italy, and Stewart et al. based on the Abrahamson & Silva relation; 3) the liquefaction analysis using SPT based on the methodology developed by Raymond Seed et al. is updated based on recently published information (Seed et al., April 2003); 4) a new method for computation of settlement is added based on the methodology presented by Raymond Seed et al.; 5) SHAKE has been slightly modified to accept blank spaces in the path of the data files; 6) tables of results can be copied to the Windows clipboard for pasting into documents; 7) the EuroCode 8 elastic response spectra are included; and, 8) additional relationships to obtain CRR and Kalpha based on research by Idriss and Boulanger (August 2003) are included. In October 2003 the USGS slightly revised the national maps in limited portions of California, Oregon and Washington. The changes only affect a limited area along the hanging wall of thrust or reverse faults. The changes involve at most an increase of about 2-3% in the probabilistic ground motions in the maps. Accordingly, the updated files are not included with this update. However, these files are included with the "all-updates" file below if you would like to also update the USGS Maps.
July 2003 Update - II: This update fixes a bug that caused SHAKE to read integer values in Option 1 as fractions.
July 2003 Update - I: In this update: 1) four new attenuation relationships are added; 2) the attenuation relationships form has been slightly re-designed to provide better organization of the different options; 3) the April 2003 updated versions of the USGS National Seismic Hazard Maps are included; and, 4) the error checking routine for the SHAKE input file has been enhanced.
May 2003 Update: This update adds a new feature that checks the input file for the most common source of errors when executing SHAKE. The program reads the input file looking for likely sources of error, e.g. values that may cause problems during the execution of SHAKE. It then displays a message providing the user with more information that can be used to fix the problem. In this update, the program also checks the first output file for errors and provides the user with a warning message that indicates the last option read. This is the option that most likely was the source of the error.
March 2003 Update - II: This update fixes a couple of bugs with computation of settlement of dry sands when using shear wave velocity data for CRR analysis, and on the name of the converted ground motion file when adding this file to the database of ground motion files.
March 2003 Update - I: In this update: 1) The USGS files for PGA and for the spectral accelerations at short period, Ss, and at 1-second period, S1, for the Conterminous USA for 2% and 10% probability of exceedance in 50 years are updated to use the files generated during the 2002 update of the National Seismic Hazard Maps; and, 2) a feature is included to automatically convert ground motion files downloaded from the PEER web site, and also obtained from the Interactive Deaggregation feature of the USGS web site.
February 2003 Update: In this update: 1) Cyclic resistance ratio using Shear Wave Velocity (Vs) data; 2) Conversion of Becker Penetration Test values to SPT for use in CRR analysis; 3) Probabilistic liquefaction analysis using CPT data; 4) Creation of ground motion files for Newmark Analysis from Quake/W node output files; 5) Update of Bartlett & Youd MLR models for liquefaction-induced ground deformation based on a recently published article; 6) Update of Bartlett & Youd MLR routine to more closely followed the procedure recommended by the authors; 7) Modification of cyclic stress ratio form to adapt routine to the CRR analysis using Vs feature and to update the methods to reflect recommendations by the authors; 8) computation of mean period in the ground motion parameters form; and, 9) fixing of some bugs in the software.
June 2002 Update: In this update: 1) Graphical output for the Newmark Displacement Analysis method is added. Plots of acceleration, velocity and displacement can be displayed together or separately. 2) The Newmark Displacement Analysis method is updated to include the approach recommended by Franklin and Chang (1977). 3) A new feature to create a horizontal equivalent acceleration (HEA) file based on the shear stress at the top of the layer (option 7) and overburden pressure (from Option 2 values) is included. 4) The routine to create an average acceleration file in the Newmark Method has been modified to use up to 50 different files. For example, this will allow you to use the acceleration file for each layer created from Option 6 to calculate a horizontal equivalent acceleration file using the acceleration time history file for each layer of your soil column. 5) The equation by Youd and Bartlett to compute liquefaction-induced ground deformation is updated. 6) The graphs for acceleration, velocity and displacement for a ground motion can be plotted together. 7) SHAKE has been modified to output a similar number of points for the shear stress history (files created with option 7) as for the acceleration time history (files created with option 6). This is necessary to compute the HEA as described in 3 above. Further information on these changes can be found in the help file.
February 2002 Update: This update: 1) adds the settlement curve to the SPT report graphs; 2) adds more output information to the Makdisi-Seed displacement analysis; 3) sets the stress reduction factor in the simplified CSR analysis to 0.5 for depths greater than 100 feet; and, 4) fixes a couple of bugs when plotting average CPT data. Further information on these changes can be found in the help file.
January 2002 Update: This update: 1) fixes a bug with the printing routine that prevents the user from choosing a different printer or paper orientation; 2) allows the user to modify the depth to the water table in the SPT routine; and, 3) allows the user to manually enter a value of CRR in the SPT form to represent soil layers that do not liquefy. Further information on these changes can be found in the help file.
October 2001 Update: This update includes two new features: 1) A beta version of liquefaction analysis using Cone Penetration Test data, and 2) Probabilistic liquefaction analysis using SPT data. The CPT routine is released in this update with the objective of obtaining comments from users experienced with the use of CPT. Thus, it is not intended to be used for day to day engineering practice. Updated correlations for the evaluation of liquefaction using SPT data have been recently presented by Cetin et al. (1999) and Seed et al. (2001). This updated approach also includes a probabilistic evaluation of liquefaction. A PDF document which provides more information on the new CPT feature and a quick tutorial is included with the update. More information on the probabilistic approach is included in the help file.
May 2001 Update: This update includes a new feature that allows you to obtain various parameters used to characterize a ground motion. These parameters include peak ground acceleration, Arias Intensity, Root-Mean-Square of the acceleration time history (RMSA), bracketed duration, Trifunac & Brady duration, and predominant period. Also, the routine used to compute the Cyclic Resistance Ratio (or CRR) using Standard Penetration Test values has been modified to reflect some changes to the methodology recently published in the April 2001 issue of the Journal of Geotechnical and Geoenvironmental Engineering. The main changes include a new equation to obtain CRR7.5, an additional equation for CN (or the factor to correct SPT values for overburden pressure), and new curves to obtain the correction factor for effective overburden pressures greater than 1 tsf, or Ks.
April 2001 Update: This update includes a new feature that is used to update the ground motion files database. Periodically, we will post ground motion files for download. For example, this update includes the ground motion files for the Nisqually, WA Earthquake of February 28, 2001.
Februay 2001 Update: This is the update to SHAKE2000 for registered ShakEdit users. The update can be downloaded by clicking on the links below. Please note that all the files are approximately 11 MB in size, thus it may take a while to download. After downloading the files to a temporary directory, unzip them to the same directory, then execute the install.exe file by using the Run command from the Start button, and follow the instructions. The program will look for the license file in the directory where ShakEdit is installed. If the file is not found, you can still install SHAKE2000, however, you will need to use your Internet-Update disk to install the license file. This update does not include the database of ground motion files. If you are a registered user of ShakEdit and would like to obtain a copy of the database, you will need to order the upgrade CD-ROM from our Buy web page.
This page was last updated on 01/15/08.