Search found 611 matches

by STKO Team
Thu Jun 17, 2021 2:37 pm
Forum: Analysis
Topic: Error Analysis : Laterally loaded pile with BNWF
Replies: 4
Views: 19

Re: Error Analysis : Laterally loaded pile with BNWF

In your fiber section, GJ is 0.
So your beam is singular in torsion.
by STKO Team
Thu Jun 17, 2021 9:05 am
Forum: Analysis
Topic: Error Analysis : Laterally loaded pile with BNWF
Replies: 4
Views: 19

Re: Error Analysis : Laterally loaded pile with BNWF

Dear user, the analysis error was due to a singularity in your model: The slave nodes should be fixed also in Ry and Rx (you only fixed Rz). Rx should be fixed for imposing a 2D constraint in the XZ plane, as you did in the pile. But the Ry should be fixed because the QY-TZ springs do not offer any ...
by STKO Team
Fri Jun 11, 2021 4:18 pm
Forum: Mesh
Topic: mesh type related error
Replies: 5
Views: 90

Re: mesh type related error

2. For the small time-step, dt of earthquake has been used for the last transient analysis. However, very large time steps have been used for gravity analyses which are conducted as transient. Should I change the type of gravity analysis from transient to static? You can turn them to static. But so...
by STKO Team
Fri Jun 11, 2021 3:47 pm
Forum: Analysis
Topic: Issue with using PDMY model
Replies: 21
Views: 245

Re: Issue with using PDMY model

We will work on it next week.
by STKO Team
Fri Jun 11, 2021 3:47 pm
Forum: Analysis
Topic: Question about another geoseismic modeling
Replies: 3
Views: 28

Re: Question about another geoseismic modeling

when I ran the model with the tolerance of NormDispIncr equal to 1e-8, I got errors many times with adaptive time step, however, with the tolerance equal to 1e-6, I got the error a few times. This is perfectly normal, the more strict is the tolerance, the more iterations OpenSees needs. You just ha...
by STKO Team
Thu Jun 10, 2021 1:26 pm
Forum: Interaction
Topic: Pile-soil Interaction Convergence
Replies: 26
Views: 625

Re: Pile-soil Interaction Convergence

Good job Bence!
And thanks for the reference and all those valuable notes. For sure they will be useful to other users!
Enjoy your work with STKO!
by STKO Team
Wed Jun 09, 2021 9:21 am
Forum: Condition
Topic: Boundary condition Shear wall
Replies: 15
Views: 88

Re: Boundary condition Shear wall

You're welcome, However, I've also modeled my diagonal compression test on the same masonry sample (same geometry same material) with the initial parameters (the ones that were in the *scd file I provided at the beginning of this chat) and the results are really good compared with the experimental o...
by STKO Team
Wed Jun 09, 2021 9:18 am
Forum: Analysis
Topic: Question about another geoseismic modeling
Replies: 3
Views: 28

Re: Question about another geoseismic modeling

When you use the FF with a larger thickness (I set it to 10000), you also have to increase by the same factor: Self Weight of FF Base Action of FF LK coefficients of FF This is also described in the reference link of your previous post. Another error was in your FixY condition (you forgot to switch ...
by STKO Team
Tue Jun 08, 2021 5:00 pm
Forum: Condition
Topic: Boundary condition Shear wall
Replies: 15
Views: 88

Re: Boundary condition Shear wall

Ok, so taking your Excel files with the compressive experimental data, and converting them to stress/strain it turns out that the elastic moduli of both brick and mortar are more or less 10 times smaller than those you input. Look at the file with these changes, it looks more reasonable. There is st...
by STKO Team
Tue Jun 08, 2021 9:16 am
Forum: Analysis
Topic: Issue with using PDMY model
Replies: 21
Views: 245

Re: Issue with using PDMY model

I would like to make sure of this with you again. Do you agree with that the bended contour results (displacement) at the end of shake (above figure) is related to using the reaction forces at end of gravity analysis (static) along the side and bottom boundaries incompatible with the real time (tra...