Slab Joints Modeling

SAP2000 offers the ability to model discontinuities in either bar or area elements.

This case study deals with the modeling of a structural joint in a slab , which is often necessary for a correct analysis of the problem.

The basic principle for understanding the underlying process is that each node, whether belonging to a bar, area, or solid element, has a compatibility attribute (Merge Number). If two or more nodes coexist in the same space, within the limits defined in the Auto Merge Tolerance property , and have the same Merge Number , these nodes are automatically merged into one after performing design or editing operations.

This automatic operation can be countered by assigning different  Merge Numbers  to the nodes to be separated.

The downloadable files can be found on the website specified at the end of the article.

Source: http://www.csiespana.com/tech_article.php?content_id=59