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Hi every body I have a frame model (one span and one story). I want to analyze the model under earthquake motion excitation. The earthquake motion duration is 30 seconds. In the first 15s of duration, I want to analyze the model with column section A, and in the second 15s of duration with column se...

fmk wrote:
> it is not necessarily the solver .. if you can send a small script that has
> a similar model using same element and material types and same analysis
> options i can run a memcheck on it.

Thanks so much Dr. McKenna, I sent script to your mail.

fmk wrote: > the malloc fail could be an indication that there is a memory leak and each > time you run a new analysis more memory is being eaten up. you can check > this by monitoring your system memory as the program runs. Thanks so much dear Dr. fmk. Yes, you're right. I checked it and saw that t...

Hi everyone I am performing an IDA analysis (nonlinear dynamic analyses with increments 0.1g) on a bridge model. This model is analyzed under mainshock-aftershock sequence ground motion. Used ground motion duration is 178.5 seconds. In order to run the IDA analysis for all of scaled ground motions (...

Hi everybody
I need to a source code of SSI system for simple structural frame. I would be grateful if anyone can help me.
Thanks so much

jackjo wrote: > Hi everybody > I modeled a infill wall by considering the presented model by Dr. Mosalam and > Dr.Gunay that exists in OpenSees page, My model is 2D and assigned it to a 2D one > story frame (one bay) and units are SI. I performed pushover analysis but after > running, I encountered ...

Hi everybody I modeled a infill wall by considering the presented model by Dr. Mosalam and Dr.Gunay that exists in OpenSees page, My model is 2D and assigned it to a 2D one story frame (one bay) and units are SI. I performed pushover analysis but after running, I encountered following errors: WARNIN...

Hi everybody I modeled a infill wall by considering the presented model by Dr. Mosalam and Dr.Gunay that exists in OpenSees page, My model is 2D and assigned it to a 2D one story frame (one bay) and units are SI. When I run this model, I encountered a warning as follows: WARNING invalid A Elastic se...

vesna wrote: > In OpenSees excitation can only be applied along global coordinate axes. > However, to simulate an angle you will need to project your acceleration at > an angle to the global axes. The effect will be the same. I want to excite the structure in a special direction other than the globa...

Hi everybody
I need an example about 2D soil structure interaction
can any one help me?
Thanks a lot

if you use test "NormDispIncr" , increase number of iteration.
I have some papers about BUCKLING RESTRAINED BRACES, my email is jackjojack16@gmail.com, for sending these papers, please mail me, if you want.

Hi saharnaz
For nodal mass, you should consider all loads applied on beams and divide them to related nodes. for considering live load, if applied distribute load on beam be W, W means:
W=WD+0.2WL that WD is dead load and WL is live load. 0.2 is live load participation Percent.

Hi saharnaz
To repkly your question, first I should know some points:
Did you use fiber sections in RC frame? what kind element did you use for modeling buckling restrained knee braces?

Hi everybody I have old version of opensees, version 0.3.1 (beta) 2001 , do new command like " test RelativeNormDispIncr 1.0e-4 10 " that don't exist in command table of old versions work in these versions ? I tried it and opensees worked without any error, but this command ( RelativeNormD...