Remove and add element within dynamic analysis

[Akbar]

Hi,

I was wondering if I can remove and add (update) the material properties (Fy for steel02) of a zero length element while dynamic analysis is running. If it is possible, which command I should use to proceed.

Any advice would be really appreciated.

Thank you.
Akbar

[fmk]

remove ele eleTag? will remove an element.

the element command will add one back in.

be WARNED that when you add a zeroLength element to a model that has undergone nodal displacements, the element will subtract off these initial displacements at each step before computing the strain.

[Akbar]

Thank you for reply.

I was wondering if I can use the remove ele eleTag + add ele commands in the analysis section of my model? As I need to update properties of 16 zerolength elements based on the axial force value of one of the elements and the axial load is varying at every step of the time history (Dynamic) analysis.

Thanks.
Akbar

[fmk]

yes you can. if you have a recorder trying to record the ele information it will have to be removed when the element is removed otherwise a segmentation fult will occur.