Search found 35 matches

by senior
Wed Dec 04, 2013 10:45 am
Forum: OpenSees.exe Users
Topic: analysis parameters
Replies: 4
Views: 997

Re: analysis parameters

Please help me
my model is huge! so I can not change them frequently !
by senior
Wed Dec 04, 2013 10:42 am
Forum: OpenSees.exe Users
Topic: analysis error
Replies: 2
Views: 615

analysis error

I am analyzing my model (it is time history analsis),are these 2 series errors or they are just announcements? 1) WARNING: CTestEnergyIncr::test() - failed to converge but goin on - current Ener gyIncr: 2.80319e+006 (max: 0.001) Norm deltaX: 0.427589, Norm deltaR: 5.58163e+007 WARNING: CTestEnergyIn...
by senior
Tue Dec 03, 2013 10:13 am
Forum: OpenSees.exe Users
Topic: analysis parameters
Replies: 4
Views: 997

analysis parameters

I have a big 2d model which has these things:
many equalDOFs
forcebeamcolumn
hysteretic material , steel02, steel 01
some rigid beams ( with large moment of inertia )
transient analysis with 3 records
plastic hinges

pls suggest transient analysis parameters ( numberer , test , ... ) .
by senior
Sun Dec 01, 2013 10:22 am
Forum: OpenSees.exe Users
Topic: rayleight damping
Replies: 2
Views: 710

rayleight damping

in this article in opensees wiki: http://opensees.berkeley.edu/wiki/index.php/Rayleigh_Damping_Command we see 3 types of betaK factors. $betaKinit is obvios, it means that neither betaK nor K matrix update. but others : in which one does betaK stay constant and K matrix update? $betaK or $betaKcomm ?
by senior
Sun Nov 17, 2013 9:12 am
Forum: OpenSees.exe Users
Topic: base shear
Replies: 1
Views: 583

base shear

how can i record base shear and also story shear in opensees?
do we have any recorder for this purpose?
by senior
Thu Nov 14, 2013 11:40 am
Forum: OpenSees.exe Users
Topic: rigid diaphragm
Replies: 7
Views: 2771

Re: rigid diaphragm

brag006 wrote:
> how are you defining a rigid diaphragm?

i write:
rigidDiaphragm 3 11 12 13 14 15 16 17
for second story for example : 21 22 23 ...
but it doesn't work.

my model is 2d and it has 15 stories.
by senior
Thu Nov 07, 2013 12:19 pm
Forum: OpenSees.exe Users
Topic: rigid diaphragm
Replies: 7
Views: 2771

rigid diaphragm

i have big model (15 and 30 stories and time history analysis). it is 2d .
someone told me if you define rigid diaphragm, your results will be incorrect and yo will certainly have analysis and convergence errors.
is it true?
by senior
Mon Nov 04, 2013 9:43 am
Forum: OpenSees.exe Users
Topic: analysis error
Replies: 1
Views: 655

analysis error

what is the problem of this code? pls help me? ################################################ #### 1-Story 1-Bay Braced frame #### ## Units Kgf-cm ## E = 2.1e6 ## A Beam = A Column = 50 ## Length Beam = 150 ## Length Column = 300 ## Nodal mass = 1 ## Moment of Inertia Beam = Column = 104.167 wipe ...
by senior
Sat Nov 02, 2013 1:23 pm
Forum: OpenSees.exe Users
Topic: eigen and analysis problem
Replies: 1
Views: 580

eigen and analysis problem

below , you see my opensees code.its a 15-story 2d building.its a steel structure but has shear wall in middle span.( i have modeled it with frame and a nonlinear hinge in bottom floor). my structure has two outriggers in middle. the problem is I can not calculate eigen values and analyze it. i don'...
by senior
Thu Oct 17, 2013 9:49 am
Forum: OpenSees.exe Users
Topic: steel01 or steel02
Replies: 4
Views: 1409

Re: steel01 or steel02

my analysis is nonlinear time history.
instead of using steel01 is it correct to use hysteretic material with no deterioration and pinching?
could they be similar?
in this way I will assign a limit for strain.
by senior
Sat Oct 05, 2013 3:38 am
Forum: OpenSees.exe Users
Topic: parallel
Replies: 1
Views: 461

parallel

1)can I do parallel projetcs with new version of opensees in 64bit systems?
2)is there any comprehensive manual for parallel processing in opensees?
by senior
Wed Oct 02, 2013 10:24 am
Forum: OpenSees.exe Users
Topic: steel01 or steel02
Replies: 4
Views: 1409

steel01 or steel02

1)for modeling steel moment frame which material is better? steel01 or steel02?
2)what about bracing? i am modeling it with uriz and mahin model? which one is better? steel 01 or 02?
by senior
Sun Sep 29, 2013 5:27 am
Forum: OpenSees.exe Users
Topic: hysteretic material
Replies: 2
Views: 868

hysteretic material

i have modeled a hysteretic material for my structure but it has an error. I have written the material as this: uniaxialMaterial Hysteretic 711 0.0011 64000000 0.00642427 68241600 0.01120305 31808000 -0.0011 -64000000 -0.00642427 -68241600 -0.01120305 -31808000 0 0 0 0 0 the error is: HystereticMate...
by senior
Sun Sep 29, 2013 12:00 am
Forum: OpenSees.exe Users
Topic: CBF buckling bracing
Replies: 3
Views: 2531

Re: CBF buckling bracing

any answers?
by senior
Sat Sep 21, 2013 3:38 am
Forum: OpenSees.exe Users
Topic: CBF buckling bracing
Replies: 3
Views: 2531

Re: CBF buckling bracing

it needs an initial camber which is obvious how to model in the chevron braces. but in X brace because of connection between two braces, it is not as easy as that. do you know how to model this camber in X braces?