Search found 37 matches
- Wed Jan 22, 2020 9:51 am
- Forum: OpenSees Sequential
- Topic: Quasi Static Cyclic Push-Over Analysis
- Replies: 3
- Views: 4136
Re: Quasi Static Cyclic Push-Over Analysis
If you want to do a cyclic push-over analysis with load-control and nodal loads , I assume that your model will never show a softening branch, otherwise you need to do a displacement-control or to apply an imposed displacement condition. Assuming that you want to do a load-controlled cyclic analysis...
- Mon Dec 30, 2019 9:08 am
- Forum: Post processing and data visualization
- Topic: Importing from tcl
- Replies: 14
- Views: 10036
Re: Importing from tcl
The same issue discussed in this post few days ago:
viewtopic.php?f=27&t=73#p112
viewtopic.php?f=27&t=73#p112
- Thu Dec 19, 2019 1:38 pm
- Forum: Post processing and data visualization
- Topic: Error when using "recorder mpco"
- Replies: 2
- Views: 2686
Re: Error when using "recorder mpco"
don't use "format" otherwise tcl will look for the clock.tcl procedure, which is not included in the tcl folder that we distribute with STKO. You can either just use "set time [clock seconds]" without the "format" option or You can copy a complete TCL installation in "C:\Program Files\STKO\opensees"...
- Sat Dec 14, 2019 10:24 pm
- Forum: OpenSees Sequential
- Topic: corotTruss element
- Replies: 3
- Views: 4203
Re: corotTruss element
These errors are saying that your model is singular, in particular the 3rd DOF as 0 in the diagonal of the stiffness matrix that cannot be factorized. WARNING BandGenLinLapackSolver::solve() -factorization failed, matrix singular U(i,i) = 0, i= 2 WARNING NewtonRaphson::solveCurrentStep() -the Linear...
- Fri Dec 13, 2019 6:41 pm
- Forum: Interaction
- Topic: rigid floor
- Replies: 7
- Views: 6438
Re: rigid floor
Looking at the warings ProfileSPDLinDirectSolver::solve() - aii < 0 it means that some diagonal elements in the stiffness matrix are 0, so the matrix is not positive definite. If you use the rigidDiaphragm with direction Z, then it links the dofs Ux,Uy,Rz to those of the slave nodes, but the other 3...
- Thu Dec 12, 2019 5:00 pm
- Forum: Interaction
- Topic: rigid floor
- Replies: 7
- Views: 6438
Re: rigid floor
No you don't need to merge it, just connect it with the slave nodes with an interaction and assign a rigidDiaphragm to the interaction
- Thu Dec 12, 2019 2:53 pm
- Forum: OpenSees Sequential
- Topic: opensees runs the STKO code
- Replies: 3
- Views: 4261
Re: opensees runs the STKO code
Unfortunately you cannot get K and M easily... the opensees function printA , will print the systema global matrix, but using a full matrix, i.e. you cannot use a sparse solver, thus it's limited to small models. For the mass, you cannot get the whole M matrix at once, but you can ask for maasses ea...
- Wed Dec 11, 2019 2:35 pm
- Forum: OpenSees Sequential
- Topic: How to setup K0 value in gravity step for SANISAND model
- Replies: 2
- Views: 2886
Re: How to setup K0 value in gravity step for SANISAND model
Hi, You cannot assign a bulk modulus to the ManzariDafalis material, but you can set the following parameters so it should be fine for you: " materialState " 0 = elastic 1 = plastic " IntegrationScheme " 5 = Forward Euler 1 = Modified Euler with error control 3 = Runge Kutta 4th order 9 = Forward Eu...
- Tue Dec 10, 2019 6:11 pm
- Forum: Interaction
- Topic: rigid floor
- Replies: 7
- Views: 6438
Re: rigid floor
Of course you can do it, but you need to explain better what you want to do. From your explaination it seems you what your floors to move rigidly only in X or Y direction but be fixed in Z... But I think what you really want to do is the rigidDiaphragm (the floor keeps its shape in the plane, but th...
Re: merge
When you merge some entities, and you have 2 coinciding items, in your case 2 edges (the pre-existing edge with a section, and the new edge that in your case is the border of a surface), the resulting merged edge cannot have the property of both edges (of course), so STKO chooses the property of one...