I have a question about modelling non-linear spring behaviour in Karamba.
I am modelling a coupled CLT wall consisting of two 1.5 m wide shell elements. The connection details, including hold-downs, angle brackets and self-tapping screws, are represented as springs. I created these springs using line elements, converted them into beams, and assigned beam-joint stiffness at the start nodes in the relevant local axis direction.
For the hold-downs, the stiffness is assigned in the global vertical direction. The wall is split into two panels, with a compression hold-down at the left side of the joint and a tension hold-down at the right side, where a 10 mm gap is included to allow rocking behaviour.
At the moment, the connections are modelled as linear springs.
Is there a component, workflow, or recommended modelling approach in Karamba that can be used to define non-linear or bi-linear spring behaviour, particularly with different stiffness values in tension and compression?
