Stif - CAESAR II - Help

Specifies stiffness associated with any support, guide, limit stop, rod, or spring that can be defined as a restraint. If you leave this option blank then the defined restraint is considered rigid. The default rigid restraint stiffness is 1.0E12. Avoid stiffnesses greatly in excess of 1.0E15.

Translation - Typical units (depending on your unit system):

• lb/in

• N/mm

• N/m

• N/cm

Rotation - Typical units (depending on your unit system):

• in•lb/deg

• N•m/deg

K1 is the initial stiffness of a bilinear restraint (for example, X2). If the restraint is not rigid, then you can type any positive stiffness.

If you specify a stiffness value for an anchor, the translational degrees of freedom at the anchored node receive the specified value, and the rotational degrees of freedom receive a factored value using the ratio of rotational stiffness divided by translational stiffness. The ratio is determined by the units you define for the model.