PeerNGAMotion

This command is used to construct a TimeSeries object which, similar to a Path TimeSeries, the load factor obtained is dependent on a series of points obtained from a file. The difference is that the file is obtained from the Peer NGA strong motion database using an internet connection.

uniaxialMaterial PeerNGA $tag $eqMotion $factor <-dT $dT> <-nPTS $nPts>

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$tag	unique tag among TimeSeries objects.
$eqMotion	the PEER NGA name of the motion (a string containing the earthquake name, station & dirn)
$factor	factor to be applied to the data points, if accel record type you want to specify G
$nPts	optional, if provided will set the variable nPts equal to number of data points found in record
$dT	optional, if provided will set the variable dT equal to time interval between points in the record

NOTES:

• If the time in the domain does not match a data point in record, linear interpolation is performed between nearest points in record.
• The command can be used with the results obtained from the searchPeerNGA command (hence the craziness of the $eqMotion names).

EXAMPLE

To create 2 time series for two horizontal motions recorded for the Borrego Mtn 1968-04-09 earthquake recorded at the USGS 117 El Centro Array #9 station

timeSeries PeerNGAMotion 1 /BORREGO/A-ELC180 $G -dT dt -NPTS nPts

timeSeries PeerNGAMotion 2 /BORREGO/A-ELC270 $G

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Code Developed by: fmk