Gradients of Reliability Index

A place to ask questions on how to use OpenSees to perform Finite Element Reliability Analysis

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luiscelorrio
Posts: 8
Joined: Wed Aug 07, 2013 6:37 am
Location: Logroño Spain
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Gradients of Reliability Index

Post by luiscelorrio » Thu Mar 13, 2014 12:07 am

Hello,
I would like to know:
Is there a function or command to compute the gradients of the reliability index (betaFORM) with relation to means of random variables?
I have also some doubts about some functions starting with “get..” like

getNodeTags
getLSFTags
getParamTags
getRVTags

Could you explain them or/and list all of them?
Thanks on advance

Luis

mhscott
Posts: 874
Joined: Tue Jul 06, 2004 3:38 pm
Location: Corvallis, Oregon USA
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Re: Gradients of Reliability Index

Post by mhscott » Thu Mar 13, 2014 8:21 am

The reliability analysis output file should contain the gradients wrt mean and stdev

The "get" functions return Tcl lists that can be iterated over with a foreach loop

foreach nd [getNodeTags] {
puts "Node $nd says hello"
}

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