BWBN Material: Difference between revisions

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{{CommandManualMenu}}
{{CommandManualMenu}}


This command is used to construct a uniaxial Bouc-Wen smooth hysteretic material object that incorporates pinching.  
This command is used to construct a uniaxial Bouc-Wen pinching hysteretic material object. This material model is an extension of the original Bouc-Wen model that includes pinching (Baber and Noori (1986) and Foliente (1995)).


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|  '''$n ''' || parameter that controls transition from linear to nonlinear range (as n increases the transition becomes sharper; n is usually grater or equal to 1)  
|  '''$n ''' || parameter that controls transition from linear to nonlinear range (as n increases the transition becomes sharper; n is usually grater or equal to 1)  
|-
|-
|  ''' $gamma $beta ''' || parameters that control shape of hysteresis loop; depending on the values of <math>\gamma</math> and <math>\beta</math> softening, hardening or quasi-linearity can be simulated (look at the NOTES)   
|  ''' $gamma $beta ''' || parameters that control shape of hysteresis loop; depending on the values of <math>\gamma</math> and <math>\beta</math> softening, hardening or quasi-linearity can be simulated (look at the [http://opensees.berkeley.edu/wiki/index.php/BoucWen_Material BoucWen Material])   
|-
|-
|  '''$Ao''' ||  parameters that control tangent stiffness
|  '''$Ao''' ||  parameter that controls tangent stiffness
|-
|  '''$q $zetas $p $Shi $deltaShi $lambda''' ||  parameters that control pinching
|-
|  '''$tol''' ||  tolerance
|-
|  '''$maxIter''' ||  maximum iterations
|}
|}




NOTES:
 
[[File:BWBN_YSPD.jpg‎]]
 
Fig. Cyclic force displacement relationship of the YSPDs generated using the BWBN material model
 
 
 
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PARAMETER ESTIMATION:
 
[[BWBNParameterEstimation]]
 
 
 
----
 
 
 
EXAMPLE:
 
[[BWBNExample]]
 
 
 
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REFERENCES:
REFERENCES:


Md Raquibul Hossaina, Mahmud Ashrafb, Jamie E. Padgett(2013). "Risk-based seismic performance assessment of Yielding Shear Panel Device", Engineering Structures, Volume 56, November 2013, Pages 1570–1579
[http://www.sciencedirect.com/science/article/pii/S0141029613003568 Hossain, M. R., Ashraf, M., & Padgett, J. E. (2013). "Risk-based seismic performance assessment of Yielding Shear Panel Device." Engineering Structures, 56, 1570-1579.]
 
[http://www.sciencedirect.com/science/article/pii/S0263823112001206 Hossain, M. R., & Ashraf, M. (2012). "Mathematical modelling of yielding shear panel device." Thin-Walled Structures, 59, 153-161.]
 
Baber, T. T., & Noori, M. N. (1986). "Modeling general hysteresis behavior and random vibration application." Journal of Vibration Acoustics Stress and Reliability in Design, 108, 411.
 
Foliente, G. C. (1995). Hysteresis modeling of wood joints and structural systems. Journal of Structural Engineering, 121(6), 1013-1022.
 
 
 
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DEVELOPED BY:
 
[http://scholar.google.com.au/citations?user=I_li3qkAAAAJ&hl=en&oi=ao Raquib Hossain], [http://www.uq.edu.au/ The University of Queensland (UQ), Australia] & [http://www.buet.ac.bd/ Bangladesh University of Engineering and Technology (BUET), Bangladesh.]

Latest revision as of 00:30, 23 October 2013



This command is used to construct a uniaxial Bouc-Wen pinching hysteretic material object. This material model is an extension of the original Bouc-Wen model that includes pinching (Baber and Noori (1986) and Foliente (1995)).

uniaxialMaterial BWBN $matTag $alpha $ko $n $gamma $beta $Ao $q $zetas $p $Shi $deltaShi $lambda $tol $maxIter
$matTag integer tag identifying material
$alpha ratio of post-yield stiffness to the initial elastic stiffenss (0< <math>\alpha</math> <1)
$ko initial elastic stiffness
$n parameter that controls transition from linear to nonlinear range (as n increases the transition becomes sharper; n is usually grater or equal to 1)
$gamma $beta parameters that control shape of hysteresis loop; depending on the values of <math>\gamma</math> and <math>\beta</math> softening, hardening or quasi-linearity can be simulated (look at the BoucWen Material)
$Ao parameter that controls tangent stiffness
$q $zetas $p $Shi $deltaShi $lambda parameters that control pinching
$tol tolerance
$maxIter maximum iterations


Fig. Cyclic force displacement relationship of the YSPDs generated using the BWBN material model



PARAMETER ESTIMATION:

BWBNParameterEstimation



EXAMPLE:

BWBNExample



REFERENCES:

Hossain, M. R., Ashraf, M., & Padgett, J. E. (2013). "Risk-based seismic performance assessment of Yielding Shear Panel Device." Engineering Structures, 56, 1570-1579.

Hossain, M. R., & Ashraf, M. (2012). "Mathematical modelling of yielding shear panel device." Thin-Walled Structures, 59, 153-161.

Baber, T. T., & Noori, M. N. (1986). "Modeling general hysteresis behavior and random vibration application." Journal of Vibration Acoustics Stress and Reliability in Design, 108, 411.

Foliente, G. C. (1995). Hysteresis modeling of wood joints and structural systems. Journal of Structural Engineering, 121(6), 1013-1022.



DEVELOPED BY:

Raquib Hossain, The University of Queensland (UQ), Australia & Bangladesh University of Engineering and Technology (BUET), Bangladesh.

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