What is the difference between variation in displacement and virtual displacement?

Also when referring to variation in the work (virtual work), we use virtual rotation not rotation variation? Thanks.

05 April 2019 3,332 10 View

Could I model a reinforced concrete member as a wire element in ABAQUS?

In shell element I could define rebars layers to define reinforcement, but could I implement rebars in wire element? Thanks

26 March 2019 2,223 8 View

How to implement plastic hinge with capacity interaction between axial load and bending moment in ABAQUS?

In 3D frame analysis, using elastic element with plastic hinge at nodes accelerate the solution time instead of using distributed plasticity. But most plastic hinges include interaction between...

26 March 2019 2,450 3 View

What is the allowable lateral acceleration of tall building due to wind load?

People feel uncomfortable in the upper stairs of the tall building when the building move laterally due to wind load or to be accurate the lateral acceleration of the building. Is their any...

21 March 2019 9,055 9 View

At implementing damage model, How could I get the effective stress-strain curve or damage parameter from true stress strain curve?

Most experimental results include true strain curve. How could I experimentally or theoretically reach effective stress strain curve or damage parameter for damage model? Thanks

01 March 2019 9,017 11 View

Does anyone read about using multi-directional cracks in 3D modeling of concrete?

I encountered using multi-directional cracks model in 2D elements, but could it be used for 3D concrete elements?

23 February 2019 384 14 View

What is the shape of loading and unloading curve of concrete in tension?

Also how could I identify the pre-transition and post-transition parts of strain increment?

21 February 2019 1,135 5 View

Do anyone have a simplified explanation, reference, or source code in using a return-map algorithm in plasticity?

I encountered a return-map technique in many papers but I do not understand how it works.

14 February 2019 8,995 3 View

Why does Etabs software calculate magnified moment (ACI -318) due second order effects in a different way?

These attached figures are captured from Concrete Frame Design Manual using ACI-318 attached with Etabs Design examples. It calculates the amplified moment due to second order effects using this...

14 February 2019 6,986 3 View

Why does arc-length method diverge when the stiffness approach zero?

10 February 2019 6,214 3 View

Is there a package in R that will allow me to run an AMOVA that will look at spatial versus temporal variance?

I am trying to establish a genetic monitoring program for an endangered fish species. The genetic diversity baseline was set 5 years ago. My study is a follow-up looking at impacts of a changing...

03 November 2020 4,228 5 View

How to interpret data in .arp file?

Hey, I am working in population genetics. I used DNAsp to convert fasta into .arp file for input in Arlequin. Can anyone help to interpret the data in the .arp file? As in which column represents...

12 October 2020 8,443 9 View

Are there R packages able to read genetic datasets in .arp format (Arlequin)?

Hi all! Hope you had a great summer! I was wondering if anyone knew an R package able to load genetic data from .arp files (that is, the Arlequin input file format,...

04 September 2020 6,175 2 View

How to calculate the Garza-Williamson index?

Hello, I'm trying to calculate the Garza-Williamson index and some articles indicate the Arlequin program, but there is not this option in the program. Someone already calculated this index and...

22 April 2020 8,778 1 View

Why AMOVA test is not active in Arlequin?

I entered the data to Arlequin and under Genetic structure, the AMOVA option is not active, is this related to input data? The other options are active and will run the analysis. I enclosed the file.

15 August 2019 4,564 4 View

Why AMOVA test is not active in Arlequin?

I entered the data to Arlequin and under Genetic structure, the AMOVA option is not active, is this related to input data? The other options are active and will run the analysis. I enclosed the file.

07 August 2019 1,462 4 View

In AMOVA analysis, can the variation be more among population as compared to within population?

During my AMOVA run, i got much higher genetic variation among population (69.39%) and less variation within population (30.61%). i am little confused with my result, can anyone suggest me any...

05 June 2019 3,916 2 View

Fail to use the Arlequin to do mismatch distribution?

I did mismatch distribution analysis on a population named popA in DnaSP and it succeed, but when I used Arlequin to do the same analysis, I can't get the result, and the file wrote "mismatch...

27 March 2019 8,435 8 View

Calculate Multilocus FST Software?

Hi together, I'm having a total blonde moment here, but for an assignment in University I have to compare different populations. For this I was given Genotypic data for one population. I...

12 March 2019 6,522 1 View

Fail to use the Arlequin to do mismatch distribution?

I did mismatch distribution analysis on a population named popA in DnaSP and it succeed, but when I used Arlequin to do the same analysis, I can't get the result, and the file wrote "mismatch...

02 March 2019 1,435 3 View