4.14.5.27. BWBN MaterialΒΆ
- uniaxialMaterial('BWBN', matTag, alpha, ko, n, gamma, beta, Ao, q, zetas, p, Shi, deltaShi, lambda, tol, maxIter)
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)).
matTag
(int)integer tag identifying material
alpha
(float)ratio of post-yield stiffness to the initial elastic stiffenss (0< alpha <1)
ko
(float)initial elastic stiffness
n
(float)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
(float)parameters that control shape of hysteresis loop; depending on the values of gamma and beta softening, hardening or quasi-linearity can be simulated (look at the BoucWen Material)
Ao
(float)parameter that controls tangent stiffness
q
zetas
p
Shi
deltaShi
lambda
(float)parameters that control pinching
tol
(float)tolerance
maxIter
(float)maximum iterations
See also