The OpenSees Community

Ashok wrote: ↑

Sat Nov 28, 2020 5:47 pm

Hi,
I am not sure about STKO, but see if this helps.
https://portwooddigital.com/2020/08/27/ ... -marplots/
This is a article written by Prof. Scott.

Thanks, it is very helpful.

I am trying to STKO's new diagram plot feature, so I just built a fixed beam to test the results. But when I fix all DOFs of node 1 and node 2, the OpenSees can not output any results. Does anyone know how to deal with it?

fix 1 1 1 1 1 1 1;
fix 2 1 1 1 1 1 1;

https://opensees.berkeley.edu/wiki/index.php/File:ElastomericBearingBoucWenFig01.png https://opensees.berkeley.edu/wiki/index.php/File:ElastomericBearingBoucWenFig01.png Hello, everyone, For the bearing element in the link, there is a relation between Fy-dy, anyone knows any references about how to...

Just tried FullGeneral, no WARNING. But it is really time-consuming.

For the output files, I designate them to different directories for each analysis.

There are some procedures shared by different analysis, which will be used by the two windows at the same time, I don't know if this will affect the results. Thanks.

dispBeamColumn needs more elements to make the results accurate enough, and FullGeneral costs more time, are there any better solutions for it? Thanks.

Hello, everyone, As described in the code below, before the transient analysis, the static analysis was carried out, the problem is when using rayleigh damping, everything goes well with the settings in the codes, but when switched to modal damping, the following WARNING will appear, WARNING - Force...

Hello, everyone, For the parametric study, I need to run two OpenSees windows to use most of the computer memory. I am wondering if it works when the two OpenSees windows are from the exact same one OpenSees.exe in the computer (say just double-click the OpenSees.exe twice and then there will be two...

selimgunay wrote: ↑

Mon Aug 24, 2020 3:36 pm

You can find a derivation and some references here:

http://citeseerx.ist.psu.edu/viewdoc/do ... 1&type=pdf

Awesome, many thanks.

Fy is the shear capacity and in a bilinear model that you use, it corresponds to the yield force. A is shear area which is equal to 5/6 of the total area for rectangular sections and 9/10 of the total area for circular sections Brilliant, for the shear area, I am trying to find some references wher...

If you are using an elastic response uniaxialMaterial Elastic $matTag $GA If inelastic (using Steel01 for example to represent bilinear relationship) uniaxialMaterial Steel01 $matTag $Fy $GA $b Fy is the shear capacity, GA is the multiplication of shear modulus and shear area, b is the ratio of slo...

mhscott wrote: ↑

Mon Aug 24, 2020 12:04 pm

Use a uniaxialMaterial to define the section shear force-shear deformation relationship, then add it to the fiber section using 'Vy' in the aggregator. I don't have a specific example on hand, but you can search the message board as this is not an uncommon question.

Thanks, it is very helpful,

Hi, everybody,
I am using the section Aggregator command to add the Shear force-deformation to the existing fiber section, but I am confused about how to define the Shear force-deformation relation for the uniaxialMaterial, anybody can help or provide some reference about it? Thanks a lot.

What if I do the static analysis and transient analysis? Will ''-mass 0.86'' be regarded as the dead load or should I define the dead load again by using load pattern command. Also if I didn't turn the PDelta effect and didn't define the dead load by using load pattern command when doing the transie...