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Dear Frank / vesna I set a displacement history file ( a time series of displacements ) and changed the load pattern to use the sp command : disp history =exp(0.05t)sin(2PI/T)t, t=0.0~30 sec . dt=o.o1 and i run a loadcontrol static analysis , i applied the sp command to the un-fixed node . approxima...

another test i've done is that when i apply a Sine form dynamic loading in -accel mode using UniformExitaton , everything is ok , when i change it to -disp mode [ with required modification] using MultipleSupport and imposedMotion command the responses will not make any sense, frank could u plz give...

till vesna or frank come to help me ! I've done some small modification on my model , first of all, when i apply the imposedMotion command on node 2 , opensees will not be terminated and analysis will perform as usual , but the results don't make any sense . a "wave shape" force-displaceme...

hi, everybody. I'm modeling a flag-shape behavior on a simple element using TwoNodeLink element. I tested the model with Sine form dynamic loading and everything was OK. at the moment i'm trying to apply a "quasi-static loading" though i need to verify my model with an experimental results...

i was installed the new version of opensees 2.2.1 . but , it doesn't work .

the error report is "the application has failed to start , because the application configuration is incorrect "

mY os is win xp - sp 3.
tanks .

I dont understand , what does it mean ?!
i checked this model with sap2000 , all support reactions is negetive .
u say that result is correct ?
I want to get story shear , i am confused !
i cannot understand what is problem of modeling ?

plz give me a help !

Hi to all . I want to model an 1story -1 bay frame with eccentric bracing . Because the model has 1 story , the brace element is connected to ground as a support . My applied latetal force to frame is in positive direction of X -axis . It is clear that reaction of supports in X-axis must be negetive...

but i think the value of hinge length can chenge the result of the analysis . is there any logical assumption for hinge length ? if there isn't , how can i rely on my model ?! -------------------------------------------------------------------------------------- my second question had no answer . --...

hi to all ! would u plz help me for determination of hinge length for a steel section ? and another question : do u have any information about this new section elemnt : flexure-shear interaction displacement -based beam - column element ? if u have , plz give me an example for steel section . tank u...