Hello,
How do I assign prescribed displacements at the supports and obtain the resulting influence vector at the structural DOFs?
For now, I would like to obtain these displacements without specifying ground motion files at the supports.
Thanks!
Influence vector for Multiple Support GM
Moderators: silvia, selimgunay, Moderators
I have two more questions/clarifications related to influence vectors.
For a 3d model with z axis as vertical, I would like to perform RHA with uniform and bidirectional patterns.
1) For uniform pattern with direction specified in $dir, is the influence vector all ones in the direction $dir and zero elsewhere?
2) From the examples in manual, I understand that we invoke uniform pattern twice for bidirectional, but what is the associated influence vector? Is it sqrt(2) (or ones or neither!) for all dofs in x and y and zero elsewhere?
I'm interested in clarifying this influence vector because I don't want to make a mistake in calculating the modal participation factors.
For a 3d model with z axis as vertical, I would like to perform RHA with uniform and bidirectional patterns.
1) For uniform pattern with direction specified in $dir, is the influence vector all ones in the direction $dir and zero elsewhere?
2) From the examples in manual, I understand that we invoke uniform pattern twice for bidirectional, but what is the associated influence vector? Is it sqrt(2) (or ones or neither!) for all dofs in x and y and zero elsewhere?
I'm interested in clarifying this influence vector because I don't want to make a mistake in calculating the modal participation factors.