Hysteretic response of steel element
Hysteretic response of steel element
(OP)
I am trying to model steel element in SAP2000 where one side of it will be fixed and at the other end an incremental force is applied. As a result I sbould get a hysteresis, or at least response total force-displacement (like in pushover analysis).
So I have several questions
- can I carry out pushover analysis without generating hinges, but generating nonlinear material properties of the element (no local nonlinearity, but global nonlinear behavior of the whole element)?
- does SAP2000 gives the opportunity to model nonlinear sross sections (fiber model)?
- any other suggestions how to solve this problem?
Please anyone who knows, help me.
So I have several questions
- can I carry out pushover analysis without generating hinges, but generating nonlinear material properties of the element (no local nonlinearity, but global nonlinear behavior of the whole element)?
- does SAP2000 gives the opportunity to model nonlinear sross sections (fiber model)?
- any other suggestions how to solve this problem?
Please anyone who knows, help me.





RE: Hysteretic response of steel element
RE: Hysteretic response of steel element
RE: Hysteretic response of steel element
RE: Hysteretic response of steel element
The main difference between each plasticity model is that a moment curvature analysis needs to be completed and a hysteresis response needs to be defined for a "lumped" plasticity model. For a "distributed" plasticity model these are directly computed/defined by the material models.
Regards,
JK7070
RE: Hysteretic response of steel element
Perhaps I misunderstood you, but a hysteresis response does not need to be manually defined for a lumped plasticity model in SAP. If you choose Fiber hinge, this is directly computed and handled automatically based on material stress-strain.
My understanding is that the distributed plasticity analytical approach automatically divides the element into areas, an approach which could be simulated by assigning multiple "lumped" plastic hinges along the length. Distributed plasticity is computationally expensive whereas lumped hinges give you the option to specify how many or how few hinges are assigned. It's an interesting topic, and I'm open to being corrected, but it's my understanding that assigning multiple fiber hinges would be a near-identical approach to distributed plasticity. Please feel free to disagree if your understanding is different.