SectionAggregator Object

[ftong]

Dear Colleagues,

Here is a question about SectionAggregator object.
I am trying to incorporate linear elastic shear component into an already-defined fiber section that captures the axial and flexural behaviors. To my knowledge, the following scripts are to be used:

section Fiber $fiberSecTag { ; # this is already defined
......
}
uniaxialMaterial Elastic $matTagV $tangent;
section Aggregator $aggrSecTag $matTagV Vy -section $fiberSecTag

Should "$tangent" in the uniaxialMaterial definition be the shear modulus G or GAv where Av is effective area of the fiber section?

Thanks
Fei

[fmk]

GA and remember it only works in the force beam column element (not the displacement element)