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If you are using an elastic response uniaxialMaterial Elastic $matTag $GA If inelastic (using Steel01 for example to represent bilinear relationship) uniaxialMaterial Steel01 $matTag $Fy $GA $b Fy is the shear capacity, GA is the multiplication of shear modulus and shear area, b is the ratio of slo...

mhscott wrote: ↑

Mon Aug 24, 2020 12:04 pm

Use a uniaxialMaterial to define the section shear force-shear deformation relationship, then add it to the fiber section using 'Vy' in the aggregator. I don't have a specific example on hand, but you can search the message board as this is not an uncommon question.

Thanks, it is very helpful,

Hi, everybody,
I am using the section Aggregator command to add the Shear force-deformation to the existing fiber section, but I am confused about how to define the Shear force-deformation relation for the uniaxialMaterial, anybody can help or provide some reference about it? Thanks a lot.

What if I do the static analysis and transient analysis? Will ''-mass 0.86'' be regarded as the dead load or should I define the dead load again by using load pattern command. Also if I didn't turn the PDelta effect and didn't define the dead load by using load pattern command when doing the transie...

Basically, I want to know how the mode shapes were normalized in OpenSEES. If anyone knows it, please tell me. Many thanks.

Hello, everyone, :D I am now doing the modal analysis for a tall building using OpenSEES, from the eigenvalue analysis I can get the natural frequencies, but I don't know how to get the generalized mass and generalized stiffness for each mode. So does anyone know how to get them from OpenSEES? Thanks.

So can I interpret it in this way that the ''-mass 0.86'' in the command, element nonlinearBeamColumn 1 1 2 7 1 1 -mass 0.86, will only be used in the modal analysis (eigenvalue analysis), and when you want to apply the dead load to the model using load pattern command, even ''-mass 0.86'' includes ...

Hello everyone: I am trying to build a model of a tall frame building to carry out the mosal analysis, and I use the command below to define the mass density of the beam: element nonlinearBeamColumn 1 1 2 7 1 1 -mass 0.86; The ''-mass 0.86'' includes the Self Weight of the beam, Slab Dead Loads and ...