Search found 19 matches

by gooddaytogo
Sat Nov 28, 2020 7:18 pm
Forum: OpenSees.exe Users
Topic: Simple fixed beam question
Replies: 3
Views: 282

Re: Simple fixed beam question

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.
by gooddaytogo
Sat Nov 28, 2020 12:47 pm
Forum: OpenSees.exe Users
Topic: Simple fixed beam question
Replies: 3
Views: 282

Simple fixed beam question

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;
by gooddaytogo
Fri Nov 06, 2020 7:58 pm
Forum: OpenSees.exe Users
Topic: How to deternmine the parameters in Elastomeric Bearing Element?
Replies: 0
Views: 224

How to deternmine the parameters in Elastomeric Bearing Element?

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...
by gooddaytogo
Wed Aug 26, 2020 7:32 am
Forum: OpenSees.exe Users
Topic: Damping issues when doing transient analysis
Replies: 6
Views: 501

Re: Damping issues when doing transient analysis

Just tried FullGeneral, no WARNING. But it is really time-consuming.
by gooddaytogo
Wed Aug 26, 2020 7:02 am
Forum: OpenSees.exe Users
Topic: How many windows can you open from a single OpenSees.exe?
Replies: 4
Views: 321

Re: How many windows can you open from a single OpenSees.exe?

For the output files, I designate them to different directories for each analysis.
by gooddaytogo
Wed Aug 26, 2020 6:48 am
Forum: OpenSees.exe Users
Topic: How many windows can you open from a single OpenSees.exe?
Replies: 4
Views: 321

Re: How many windows can you open from a single OpenSees.exe?

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.
by gooddaytogo
Wed Aug 26, 2020 6:46 am
Forum: OpenSees.exe Users
Topic: Damping issues when doing transient analysis
Replies: 6
Views: 501

Re: Damping issues when doing transient analysis

dispBeamColumn needs more elements to make the results accurate enough, and FullGeneral costs more time, are there any better solutions for it? Thanks.
by gooddaytogo
Tue Aug 25, 2020 10:24 pm
Forum: OpenSees.exe Users
Topic: Damping issues when doing transient analysis
Replies: 6
Views: 501

Damping issues when doing transient analysis

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...
by gooddaytogo
Tue Aug 25, 2020 2:27 pm
Forum: OpenSees.exe Users
Topic: How many windows can you open from a single OpenSees.exe?
Replies: 4
Views: 321

How many windows can you open from a single OpenSees.exe?

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...
by gooddaytogo
Mon Aug 24, 2020 7:07 pm
Forum: OpenSees.exe Users
Topic: Aggregator command to add the Shear force-deformation
Replies: 10
Views: 645

Re: Aggregator command to add the Shear force-deformation

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.
by gooddaytogo
Mon Aug 24, 2020 3:15 pm
Forum: OpenSees.exe Users
Topic: Aggregator command to add the Shear force-deformation
Replies: 10
Views: 645

Re: Aggregator command to add the Shear force-deformation

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...
by gooddaytogo
Mon Aug 24, 2020 1:40 pm
Forum: OpenSees.exe Users
Topic: Aggregator command to add the Shear force-deformation
Replies: 10
Views: 645

Re: Aggregator command to add the Shear force-deformation

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...
by gooddaytogo
Mon Aug 24, 2020 1:25 pm
Forum: OpenSees.exe Users
Topic: Aggregator command to add the Shear force-deformation
Replies: 10
Views: 645

Re: Aggregator command to add the Shear force-deformation

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,
by gooddaytogo
Mon Aug 24, 2020 11:32 am
Forum: OpenSees.exe Users
Topic: Aggregator command to add the Shear force-deformation
Replies: 10
Views: 645

Aggregator command to add the Shear force-deformation

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.
by gooddaytogo
Tue Jun 23, 2020 3:51 pm
Forum: OpenSees.exe Users
Topic: Question about modal analysis of the talll building
Replies: 4
Views: 605

Re: Question about modal analysis of the talll building

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...