uniaxialMaterial('BarSlip', matTag, fc, fy, Es, fu, Eh, db, ld, nb, depth, height, ancLratio=1.0, bsFlag, type, damage='Damage', unit='psi')
This command is used to construct a uniaxial material that simulates the bar force versus slip response of a reinforcing bar anchored in a beam-column joint. The model exhibits degradation under cyclic loading. Cyclic degradation of strength and stiffness occurs in three ways: unloading stiffness degradation, reloading stiffness degradation, strength degradation.
matTag |
integer tag identifying material |
fc |
positive floating point value defining the compressive strength of the concrete in which the reinforcing bar is anchored |
fy |
positive floating point value defining the yield strength of the reinforcing steel |
Es |
floating point value defining the modulus of elasticity of the reinforcing steel |
fu |
positive floating point value defining the ultimate strength of the reinforcing steel |
Eh |
floating point value defining the hardening modulus of the reinforcing steel |
ld |
floating point value defining the development length of the reinforcing steel |
db |
point value defining the diameter of reinforcing steel |
nb |
an integer defining the number of anchored bars |
depth |
floating point value defining the dimension of the member (beam or column) perpendicular to the dimension of the plane of the paper |
height |
floating point value defining the height of the flexural member, perpendicular to direction in which the reinforcing steel is placed, but in the plane of the paper |
ancLratio |
floating point value defining the ratio of anchorage length used for the reinforcing bar to the dimension of the joint in the direction of the reinforcing bar (optional, default: 1.0) |
bsFlag |
string indicating relative bond strength for the anchored reinforcing bar (options: 'Strong' or 'Weak') |
type |
string indicating where the reinforcing bar is placed. (options: 'beamtop', 'beambot' or 'column') |
damage |
string indicating type of damage:whether there is full damage in the material or no damage (optional, options: 'Damage', 'NoDamage' ; default: 'Damage') |
unit |
string indicating the type of unit system used (optional, options: 'psi', 'MPa', 'Pa', 'psf', 'ksi', 'ksf') (default: 'psi' / 'MPa') |