flat slider element problems

[nahid2011]

First Q:

Dear Sir or Madam
In the below command for flatSlider Element I do not have any Idea about defining the (Kint)

element flatSliderBearing $eleTag $iNode $jNode $frnMdlTag $kInit -P $matTag -T $matTag -My $matTag -Mz $matTag

When I define a very big (Kint) the structure becomes unstable with a very great period and when I define a small (Kint) the structure becomes stiff. This issue is completely confused me. I DO NOT HAVE ANY CLUE about the parameter (Kint).

Would you please help me???
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Second Q:

In order to find out about the basis of Kint I tried to investigate the out puts of FlatSlider Element.
The problem is that the out put files are all empty (even for the example presented the out put for Friction force and Normal force is empty) I applied the -xml option instead of -file option, but it seems that the out put is not defined for this element???

Since having the friction and Normal forces is vital for verifying process of the analysis

Would you please help in this issue too???

Kindest Regards

Nahid

[taneryilmaz]

I once asked a question about flat slider elements. I did not get the results I expected from this element, and definitions were not so clear. So I gave up later. But I hope the link below helps:

http://opensees.berkeley.edu/community/ ... =2&t=59754

[nahid2011]

Dear Yilmaz

Thanks for your reply
well at last I My self solved the problem

in fact kint is the threshold displacement,

so if Fy=mu*N then the actual stiffness is K=Fy/kint

by very simple examples you can see that too

iyi şanslar