I require example for Finite Element Reliability Analysis

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Shahrakih
Posts: 7
Joined: Wed Nov 02, 2011 4:54 am

I require example for Finite Element Reliability Analysis

Post by Shahrakih » Wed Nov 02, 2011 5:20 am

Hi friends
I require an input example.tcl for Finite Element Reliability Analysis for RC moment frames .

Shahrakih
Posts: 7
Joined: Wed Nov 02, 2011 4:54 am

Re: Problem in Reliability Analysis

Post by Shahrakih » Fri Nov 04, 2011 7:56 am

Hi Freinds
I've executed, for test, the first example proposed by Terje Haukas in his doctor thesis:


reliability
randomVariable 1 lognormal 500.0 100.0 500.0
randomVariable 2 lognormal 2000.0 400.0 2000.0
randomVariable 3 uniform 5.0 0.5 5.0
correlate 1 2 0.3
correlate 1 3 0.2
correlate 2 3 0.2
set a "{x_2}/(1000.0*{x_3})"
set b "{x_1}/(200.0*{x_3})"
performanceFunction 1 "1.0-\$a-\$b*\$b"
probabilityTransformation Nataf -print 0
reliabilityConvergenceCheck Standard -e1 1.0e-3 -e2 1.0e-3 -print 1
gFunEvaluator Basic
gradGEvaluator FiniteDifference -pert 1000
searchDirection iHLRF
meritFunctionCheck AdkZhang -multi 2.0 -add 10.0 -factor 0.5
stepSizeRule Armijo -maxNum 50 -base 0.5 -print 0
startPoint Mean
findDesignPoint StepSearch -maxNumIter 100
runFORMAnalysis FORMoutput.out


but the reliability index = 0
why ???????

asalnaz
Posts: 3
Joined: Fri Nov 04, 2011 7:17 am

Re: I require example for Finite Element Reliability Analysi

Post by asalnaz » Fri Nov 04, 2011 9:13 pm

by asalnaz » Fri Nov 04, 2011 9:47 pm

hi
i do this work but it is not true in results yet!i have index reliability but i dont have eta or delta!
i change gFunEvaluator and the results was beter.
can anyone help me?thank u.


# CREATE THE RELIABILITY MODEL BUILDER. NO FINITE ELEMENT MODEL BUILDER IS NECESSARY IN THIS EXAMPLE
reliability
randomVariable 1 lognormal 500.0 100.0 500.0
randomVariable 2 lognormal 2000.0 400.0 2000.0
randomVariable 3 uniform 5.0 0.5 5.0
correlate 1 2 0.3
correlate 1 3 0.2
correlate 2 3 0.2
#set a "\$xrv(2) / (1000.0*\$xrv(3))"
#set b "\$xrv(1) / (200.0*\$xrv(3))"
performanceFunction 1 "1.0 - (\$xrv(2) / (1000.0*\$xrv(3))) - ((\$xrv(1) / (200.0*\$xrv(3)))*(\$xrv(1) / (200.0*\$xrv(3))))"
probabilityTransformation Nataf -print 0
reliabilityConvergenceCheck Standard -e1 1.0e-3 -e2 1.0e-3 -print 1
gFunEvaluator Tcl -file "set a 1"
#gFunEvaluator Basic
gradGEvaluator FiniteDifference -pert 1000
searchDirection iHLRF
meritFunctionCheck AdkZhang -multi 2.0 -add 10.0 -factor 0.5
stepSizeRule Armijo -maxNum 50 -base 0.5 -print 0
startPoint Mean
findDesignPoint StepSearch -maxNumIter 100
runFORMAnalysis FORMoutput.out

Shahrakih
Posts: 7
Joined: Wed Nov 02, 2011 4:54 am

Response

Post by Shahrakih » Tue Nov 08, 2011 5:17 am

Hi Dear Asalnaz
you must substitute the last line with :
runFORMAnalysis FORMoutput.out -relSens 1
:D :D :D coodluck

asalnaz
Posts: 3
Joined: Fri Nov 04, 2011 7:17 am

Re: I require example for Finite Element Reliability Analysi

Post by asalnaz » Tue Nov 08, 2011 11:44 am

Hi Dear Shahrakin
i try your sugestion, but it is not similar to answer of Terje Haukas example!!!!!

asalnaz
Posts: 3
Joined: Fri Nov 04, 2011 7:17 am

Re: I require example for Finite Element Reliability Analysi

Post by asalnaz » Wed Nov 09, 2011 7:27 am

i want example about fosm and mcs analysis. is there any example about fosm (first order second moment) and mcs(mont carlo simulation) analysis?
thank u.

linguan118
Posts: 141
Joined: Sun Oct 03, 2010 11:36 pm
Location: Hong Kong

Re: I require example for Finite Element Reliability Analysi

Post by linguan118 » Wed Dec 21, 2011 6:56 pm

I think the wiki manu has many examples contributed by Gu Quan
http://opensees.berkeley.edu/wiki/index ... l_Commands:
Research Assistant Professor, The Hong Kong Polytechnic University
guanlin@polyu.edu.hk

Shahrakih
Posts: 7
Joined: Wed Nov 02, 2011 4:54 am

Help for FERA in OPENSEES

Post by Shahrakih » Tue Jan 03, 2012 8:56 am

Dear linguan
I checked this link :
http://opensees.berkeley.edu/wiki/index ... l_Commands
but I didn't find any example , do you run Finite Element Reliability Analysis
( FERA ) in OPENSEES ?

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