February 13, 2012
How to Apply a Rigid Diaphragm in RISA-3D
In RISA-3D, rigid diaphragms can be added using the Diaphragm spreadsheet. Just enter the node label and then choose the horizontal plane.
Internally, all rigid diaphragms are membrane diaphragms that tie all of the nodes within the diaphragm plane together for both translation and rotation, but only within the plane of the diaphragm. This is done internally using rigid links.