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add a new ground motion model - Original_Sadigh_97 #12

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
EQRM has a Sadigh_97 GMM, but it is using a convention defined by Campbell 
2003.  Let's add the original sadigh_97 equation.

Here's a place on the web that has the correct formula and coefficients;
http://www.ferc.gov/industries/hydropower/safety/guidelines/eng-guide/chap13-dra
ft.pdf

Original issue reported on code.google.com by duncan.g...@gmail.com on 21 Feb 2012 at 4:51

GoogleCodeExporter commented 9 years ago 
Since in the future we might want to call sadigh_97 something else, let's call 
this GMM sadigh_original_97 so a search and replace will beeasier.

Original comment by duncan.g...@gmail.com on 21 Feb 2012 at 11:48

GoogleCodeExporter commented 9 years ago 
Created new branch gmm_sadigh97 to implement this.

Original comment by b...@girorosso.com on 23 Feb 2012 at 1:30

GoogleCodeExporter commented 9 years ago 
Revision 959 implements the Sadigh 97 model as described in eq. C-17 of 
[http://www.ferc.gov/industries/hydropower/safety/guidelines/eng-guide/chap13-dr
aft.pdf Idriss et al.]

Questions remaining:
- What should sigma be?
- Test data used from table 3.2 of 
[http://peer.berkeley.edu/publications/peer_reports/reports_2010/web_PEER_10106_
THOMASetal.pdf Thomas et al.]. This is a sample for 1 magnitude and 1 period 
only. Is there any further test data available?

Once answered, we can develop some scenario tests for this model.

Original comment by b...@girorosso.com on 23 Feb 2012 at 3:22

GoogleCodeExporter commented 9 years ago 
Revision 961 adds Sadigh '97 test data from the OpenSHA test result set, which 
contains a wider range of periods and magnitudes.

Original comment by b...@girorosso.com on 23 Feb 2012 at 6:44

GoogleCodeExporter commented 9 years ago 
Revision 962 adds sigma coefficients and values as per table C-7 Idriss et al.

Original comment by b...@girorosso.com on 24 Feb 2012 at 12:26

GoogleCodeExporter commented 9 years ago 
Revision 966 adds an implementation test that stresses the new model

Original comment by b...@girorosso.com on 28 Feb 2012 at 12:22

GoogleCodeExporter commented 9 years ago 
Revision 977 merges these changes into the trunk.

Original comment by b...@girorosso.com on 29 Feb 2012 at 5:46