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Hi all
I just want to know if there is a way to update freq value for each step of analysis in order to update damping factor which depend on it ?
Thanks

hi all
if there is command to perform response spectrum analysis in Open Sees ?
thank you

apart from SAP I just need that the bending moment recognizes the additional 1m coming from the offset of the deck from the pier without altering the pier height considered in the pier stiffness calculation

hi vesna
I just want remind you about my question about rigid body constrain ? If there is any News in this matter ?
thank you so much

I want to thank you so much for your reply. I already used it, i.e., the rigid link, but it did not work. What i really want is to make the base shear be the same and the bending moment at the base of pier to be increased by the value of the base shear * 1 meter ( the value of the offset distance) w...

hi all I have a question about the analyses process for a model which use gap material, when the gap closed something happened make the analyses failed, when I used the following numerical methods (algorithms) for solution 1- Newton 2- Modified Newton 3- Broyden 4- Kryov 5- BFGS But when I used the ...

hi all

I am looking for RIGID BODY CONSTRAIN command Like SAP2000 program so i want to model the deck of bridge at the center line which one meter above the pier end .
note: i didn't want (equal degree of freedom constrain )

finally i want to thank you for all your effort

hi all
if there a command to get the time period (T) of the building?
how to get the participation factor of each mode ?
thank you

hi vesna I relay feel grateful for your assistance to me my model simply based on making element with the material 11 which is parallel material uniaxialMaterial Elastic 9 100 uniaxialMaterial ElasticPPGap 10 1000000000 100000000 0.1 uniaxialMaterial Parallel 11 9 10 I just want to no how this eleme...

# ------------------------------ # Start of model generation # ------------------------------ # Create ModelBuilder (with two-dimensions and 3 DOF/node) model basic -ndm 2 -ndf 3 # Create nodes # tag X Y node 1 0.0 7.0 node 2 8.0 7.0 node 3 16.0 7.0 node 4 24.0 7.0 node 5 32.0 7.0 node 61 39.5 7.0 n...

How can i send you the file ?
could you send me email address or tell me other way to use.
thank you very much

hi first thank you, your replay make the model to be run. but i found this message during running the model in this statement #perform the gravity load analysis, requires 10 steps to reach the load level set ok [analyze 10] WARNING :: node set TrailDisp<> - incompatable sizes WARNING :: node set Tra...

i am so happy for your reply but when i used it something happened uniaxialMaterial Hysteretic 10 0.04 0.04 0.06 0.06 <0.1 0.1> -0.04 -0.04 -0.06 -0.06 <-100000000 -0.1> 1 1 0 0 0 warning invalid mom3p Hysteretic material: 10 expected floating-point number but got "<0.1" finally thank you ...

hi all I need to define in OpenSees a constitutive model for a spring with the following characteristics 1- Zero stiffness for negative displacements ( tension ) and for positive displacements ( compression )up to given displacement ( d ) 2- Infinite ( or nearly infinite ) stiffness for positive dis...