Error for using hysteretic Material

[Moochul Shin]

Hello.

I am trying to use the hysteretic material.

But I got the following 'error'

---------------------------------------------------------------------------------
HystereticMaterial::HystereticMaterial -- input backbone is not unique <one-to-one>
--------------------------------------------------------------------------------

How can I fix it?

And then, please look at the values I used for the hysteretic material

set fc1C [expr -5.3504*$ksi]; # CONFINED
set eps1C -0.002;# strain at maximum stress
set fc2C [expr -6.9*$ksi];
set eps2C -0.0120;
set fc3C [expr -7.6996*$ksi];
set eps3C -0.0137;
set fc1T [expr 5.3504*$ksi];
set eps1T 0.002;
set fc2T [expr 6.9*$ksi];
set eps2T 0.020;
set fc3T [expr 7.6996*$ksi];
set eps3T 0.0137;

uniaxialMaterial Hysteretic $IDconcCoreCFRP $fc1C $eps1C $fc2C $eps2C $fc3C $eps3C $fc1T $eps1T $fc2T $eps2T $fc3T $eps3T 0.001 0.002 0.0 0.0 0

Thank you

[silvia]

you have not defined a unique curve, you need to change some T's into C's, right?!!

[Moochul Shin]

you have not defined a unique curve, you need to change some T's into C's, right?!!

I don't understand the unique curve that you said.
How can I define the unique curve?

And then, I think that I don't need to change any T's for tension part.

[silvia]

sorry, i looked too quickly. you eps3 should not be less than eps2!

[Moochul Shin]

sorry, i looked too quickly. you eps3 should not be less than eps2!

I revised my eps3. My eps3 is bigger than eps2. But I have still same error.

Do you have any idea in order to see how the hysteretic material works?

Thank you very much

[silvia]

please put into your script the following command and see what you get:

Code: Select all

puts "$IDconcCoreCFRP $fc1C $eps1C $fc2C $eps2C $fc3C $eps3C $fc1T $eps1T $fc2T $eps2T $fc3T $eps3T 0.001 0.002 0.0 0.0 0"

[Moochul Shin]

please put into your script the following command and see what you get:

Code: Select all

puts "$IDconcCoreCFRP $fc1C $eps1C $fc2C $eps2C $fc3C $eps3C $fc1T $eps1T $fc2T $eps2T $fc3T $eps3T 0.001 0.002 0.0 0.0 0"

I got the values I put into each terms.

These are what I got

----------------------------------
7 -5.3504 -0.002 -6.9 -0.0120 -7.6996 - 0.0137 5.3504 0.002 6.9 0.012 7.6996 0.0137 0.001 0.002 0.0 0.0 0
--------------------------------------------

and then same error message
-------------------------------------------
HystereticMaterial::Hystereticmaterial -- input backbone is not unique < one to one>
-------------------------------------------

[silvia]

please read the manual and put the arguments in the proper order, as specified by the manual (positive values first)

[Moochul Shin]

please read the manual and put the arguments in the proper order, as specified by the manual (positive values first)

Thanks I got it.

[mrazadi1986]

Hi

I had this problem. I could understand the problem is from using the decimal and integer numbers. For example:

When i entered fy=40 the mentioned error occurred when I entered fy=40.0 the program ran successfully.