Gpec8

Synopsis

gpec8 [OPTIONS] [FILE]

Description

Determines the the EC8 category of a site for horizontally layered models given through stdin or FILE.

The input is the soil column (in a format similar to gpsh The output is the EC8 site category depending on the value of the time-averaged velocity over the top 30 m ("VS30")

EC8 site categories

Category A :  Rock, $800m/s<VS30$
Category B :  Stiff soil / soft rock, $360m/s<VS30<800m/s$
Category C :  Normal soil $180m/s<VS30<360m/s$
Category D : Soft soil, $100m/s<VS30<180m/s$
Category E : Thin soft soil with $100m/s<VS<360m/s$ and a thickness between 5 and 20 m , overlying a much stiffer unit with $VS>800m/s$ 
Category S1 : Special category 1 : very soft soil ($VS30<100m/s$), or containing at least 10 m of soft clays/silts with high platicity index
Category S2 : Special category 2 : liquefiable soils, or all those not covered by A-E and S1 category: !! Cannot be identified from the sole VS velocity profile

Format for layered models:

 Line 1  : <number of layers n including half-space for first model>
 Line 2  : <thickness (m)> <Vp (m/s)> <Vs (m/s)> <Density (kg/m3)>[ <Qp> <Qs>]
 ....
 Line n+1 : 0 <Vp (m/s)> <Vs (m/s)> <Density (kg/m3)>[ <Qp> <Qs>]
 Line n+2 : <number of layers m including half-space for a second model - if wished>
 Line n+3 : <thickness (m)> <Vp (m/s)> <Vs (m/s)> <Density (kg/m3)>[ <Qp> <Qs>]
 ....
 Line n+m+2 : 0 <Vp (m/s)> <Vs (m/s)> <Density (kg/m3)>[ <Qp> <Qs>]
 Line n+m+3 : <number of layers l including half-space for a third model - if wished>
 ....

Quality factors are not mandatory. Any number of models can be given as input.

Gpec8 options : Only Generic options

• -help <SECTION> Show help about options. SECTION may be empty or: all, generic
• -version Show version information
• -app-version Show short version information
• -reportbug Start bug report dialog, information about bug is

                           passed through stdin. This option is used
                           internally to report bugs if option -nobugreport is
                           not specified.

• -reportint Start bug report dialog, information about

                           interruption is passed through stdin. This option
                           is used internally to report interruptions if
                           option -nobugreport is not specified.

• -nobugreport Do not generate bug report in case of error

Examples

 gpec8 < test.model

Calculate the EC8 site category for the soil columns in "test.model"

Copyright

Copyright (c) 2002-2008 Marc Wathelet. All rights reserved. See http://www.geopsy.org for more information.