4.14.5.35. Backbone Material

uniaxialMaterial('Backbone', matTag, backboneTag)

This command uses a Hysteretic Backbone object to represent a path-independent uniaxial material. Since it is path-independent, no state information is stored by BackboneMaterial.

matTag (int)

integer tag identifying material

backboneTag (int)

integer tag identifying a predefined backbone function.

4.14.5.35.1. Hysteretic Backbone

HystereticBackbone represents a backbone curve for hysteretic models.

  1. ArctangentBackbone

  2. BilinearBackbone

  3. ManderBackbone

  4. MultilinearBackbone

  5. TrilinearBackbone

  6. MaterialBackbone

  7. ReeseStiffClayBelowWS

  8. ReeseStiffClayAboveWS

  9. VuggyLimestone

  10. CementedSoil

  11. WeakRock

  12. LiquefiedSand