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Hi I have a 6 story rc moment frame with brb,i have used beamwithhings element for beams and columns. i want to calculate the maximum rotation in two ends of beams and columns in nonlinear time history analysis. i used the following recorder: recorder EnvelopeElement -file $file/col10rotation.out -e...

hi every body
how we can get the maximum of absolute acceleration with envelope node recorder?
when i use envelope node recorder out put is relative acceleration not absolute acceleration.

is there an example or something that would help me?

hi,
i've verified an experimental test for brb with this element. you should use truss element with elastic material for portions in brb that remain elastic and use truss element with nonlinear material for central portion of brb(yieilding core)

hi every body.
i have a 6 story rc moment frame with buckling restrained braces. i use element beamwithhings for columns and beams and nonlinear beam column for buckling restrained braces. now i want determine the place and order of plastic hings in structure,how can i do it

hi everybody. i'm doing NTHA for a rc moment frame with brb. by using different algorithms,integrators and dts ,analysis fails at 6 or 12 seconds and when i use below analysis options the analysis stops at 15.2913 second and does not progress(with no error and no warning)why? algorithm newtonlinesea...

hi.
you can use truss element with nonlinear material for yeilding portion and use elastic beam column element for nonyeilding portion.

hi i'm doing NTHA for a 2D, 6 story RC moment frame . i have a big problem, when i use these analysis options, analysis runs successfully but the results are very different from when i use other analysis options, test NormDispIncr 1.0e-6 50 algorithm KrylovNewton integrator Newmark 0.5 0.25 analysis...

hi. my model is a 2D moment frame with BRB. i'm doing time history analysis now i want to catch story shears.i know that the story shear in the first story equals to the base shear and( i have the base shear) and also i know that for calculating the story shear i should take element recorder and the...

hi everybody i'm doing time history analysis for a 2D RC moment frame with and without BRB. for calculating base shear in moment frame i've used element recorder and extract forces in columns in global coordinate then i added fxs together,but when i have buckling restrained knee braces in structure ...

HI
how can we find an appropriate dt for time history analysis?
is there any limitation for the lowest dt? or we can lessen dt until the analysis runs successfully?

hi every body. my model is a 2D RC moment frame with BRB. i'm doing time history analysis but these warnings occures and even when i try other algorithms and decrease dt ,analysis fails at that time( 5.452) again,why?( PGA occures at 5...sec)what should i do? WARNING: CTestNormDispIncr::test() - fai...

hi everybody. i'm doing pushover analysis for a 6 story RC moment frame, i have a loop for trying various types of algorithms, after these warning analysis runs successfully, despite of these warnings the outputs are valid or nut???? Model Built WARNING: CTestNormDispIncr::test() - failed to converg...

hi everybody
my model is 2D, 6 story RCmoment frame with BRB. I need to extract envelope of base shear and overturning moment in NTHA, how can i do this?

hi friends. my model is a 6 story RCmoment frame with buckling restrained knee braces,when i do time history analysis the analysis does not run successfully even when i use various algorithms, what should i do? Warning: CTestNormDispIncr::test<>-failed to converge after 50 iterations NewtonLineSearc...