uniaxialMaterial('BoucWen', matTag,alpha, ko, n, gamma, beta, Ao, deltaA, deltaNu, deltaEta)
This command is used to construct a uniaxial Bouc-Wen smooth hysteretic material object. This material model is an extension of the original Bouc-Wen model that includes stiffness and strength degradation (Baber and Noori (1985)).
matTag |
integer tag identifying material |
alpha |
ratio of post-yield stiffness to the initial elastic stiffenss (0< alpha <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 gamma and beta softening, hardening or quasi-linearity can be simulated (look at the NOTES) |
Ao deltaA |
parameters that control tangent stiffness |
deltaNu deltaEta |
parameters that control material degradation |