I need to model a confined concrete using concrete07 code
http://opensees.berkeley.edu/OpenSees/m ... l/4055.htm
i am going to model in SI units
For defining fcc we need some parameters like A and B and x' ...
and i cant understand about fl1 and fl2.what this parameters means?
and i need an example of this code for defining confined concrete
please help me!
Thanks...
confined concrete using concrete07
Moderators: silvia, selimgunay, Moderators
Re: confined concrete using concrete07
Hi!
This is Ryan, and I am currently a graduate student at the University of Nevada, Las Vegas. I am currently attempting to model a concrete bridge for my master's thesis, and am investigating the Concrete07 model as well. I had the same question you did, and I believe the fl1 and fl2 values refer to the lateral confining pressure from the transverse reinforcement. These are referenced as flx and fly in the paper below:
Mander, J.B., Priestley, M.J.N., and Park, R. [1988] “Theoretical Stress-Strain Model for
Confined Concrete,” Journal of Structural Engineering, Vol. 114, No. 8, pp. 1804-1826.
Many confinement models are based upon this research. Be careful because the paper lists both f'l and fl, so I am not sure which is valid. Some experimentation with the values should clear things up. Lucky for me my columns are transversely-reinforced with circular hoops, so flx = fly! For non-symmetrical rectangular ties this would not be the case, but the paper lists formulations for the variables. Also the link to the old OpenSEES manual gives a lowdown of the remaining values for Concrete07, try copying this link into your browser: http://opensees.berkeley.edu/OpenSees/m ... l/4055.htm
You may have solved your problem already but I have learned so much from these forums that I figured it was time to give something back! Please let me know if you require any further assistance and I could e-mail you a PDF of the paper if you require it.
Good skill!
Ryan
This is Ryan, and I am currently a graduate student at the University of Nevada, Las Vegas. I am currently attempting to model a concrete bridge for my master's thesis, and am investigating the Concrete07 model as well. I had the same question you did, and I believe the fl1 and fl2 values refer to the lateral confining pressure from the transverse reinforcement. These are referenced as flx and fly in the paper below:
Mander, J.B., Priestley, M.J.N., and Park, R. [1988] “Theoretical Stress-Strain Model for
Confined Concrete,” Journal of Structural Engineering, Vol. 114, No. 8, pp. 1804-1826.
Many confinement models are based upon this research. Be careful because the paper lists both f'l and fl, so I am not sure which is valid. Some experimentation with the values should clear things up. Lucky for me my columns are transversely-reinforced with circular hoops, so flx = fly! For non-symmetrical rectangular ties this would not be the case, but the paper lists formulations for the variables. Also the link to the old OpenSEES manual gives a lowdown of the remaining values for Concrete07, try copying this link into your browser: http://opensees.berkeley.edu/OpenSees/m ... l/4055.htm
You may have solved your problem already but I have learned so much from these forums that I figured it was time to give something back! Please let me know if you require any further assistance and I could e-mail you a PDF of the paper if you require it.
Good skill!
Ryan
Re: confined concrete using concrete07
could you email the paper to me ? i have the same problem to define the parameters.
email add : hingis46@gmail.com
email add : hingis46@gmail.com
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wuhaoshrek
- Posts: 122
- Joined: Tue Oct 28, 2008 4:01 am
Re: confined concrete using concrete07
isaacr wrote:
> Hi!
>
> This is Ryan, and I am currently a graduate student at the University of
> Nevada, Las Vegas. I am currently attempting to model a concrete bridge
> for my master's thesis, and am investigating the Concrete07 model as well.
> I had the same question you did, and I believe the fl1 and fl2 values refer
> to the lateral confining pressure from the transverse reinforcement. These
> are referenced as flx and fly in the paper below:
>
> Mander, J.B., Priestley, M.J.N., and Park, R. [1988] “Theoretical
> Stress-Strain Model for
> Confined Concrete,” Journal of Structural Engineering, Vol. 114, No. 8, pp.
> 1804-1826.
>
> Many confinement models are based upon this research. Be careful because
> the paper lists both f'l and fl, so I am not sure which is valid. Some
> experimentation with the values should clear things up. Lucky for me my
> columns are transversely-reinforced with circular hoops, so flx = fly! For
> non-symmetrical rectangular ties this would not be the case, but the paper
> lists formulations for the variables. Also the link to the old OpenSEES
> manual gives a lowdown of the remaining values for Concrete07, try copying
> this link into your browser:
> http://opensees.berkeley.edu/OpenSees/m ... l/4055.htm
>
> You may have solved your problem already but I have learned so much from
> these forums that I figured it was time to give something back! Please let
> me know if you require any further assistance and I could e-mail you a PDF
> of the paper if you require it.
>
> Good skill!
>
> Ryan
Ryan, I'm interested in your paper for concrete07 as well, would you please send the
copy to me if you think it is OK. My email address list in my signature.
Best.
> Hi!
>
> This is Ryan, and I am currently a graduate student at the University of
> Nevada, Las Vegas. I am currently attempting to model a concrete bridge
> for my master's thesis, and am investigating the Concrete07 model as well.
> I had the same question you did, and I believe the fl1 and fl2 values refer
> to the lateral confining pressure from the transverse reinforcement. These
> are referenced as flx and fly in the paper below:
>
> Mander, J.B., Priestley, M.J.N., and Park, R. [1988] “Theoretical
> Stress-Strain Model for
> Confined Concrete,” Journal of Structural Engineering, Vol. 114, No. 8, pp.
> 1804-1826.
>
> Many confinement models are based upon this research. Be careful because
> the paper lists both f'l and fl, so I am not sure which is valid. Some
> experimentation with the values should clear things up. Lucky for me my
> columns are transversely-reinforced with circular hoops, so flx = fly! For
> non-symmetrical rectangular ties this would not be the case, but the paper
> lists formulations for the variables. Also the link to the old OpenSEES
> manual gives a lowdown of the remaining values for Concrete07, try copying
> this link into your browser:
> http://opensees.berkeley.edu/OpenSees/m ... l/4055.htm
>
> You may have solved your problem already but I have learned so much from
> these forums that I figured it was time to give something back! Please let
> me know if you require any further assistance and I could e-mail you a PDF
> of the paper if you require it.
>
> Good skill!
>
> Ryan
Ryan, I'm interested in your paper for concrete07 as well, would you please send the
copy to me if you think it is OK. My email address list in my signature.
Best.