February 11, 2016

How Can I Model Slabs that are Pinned to Each Other?

Construction joints involving shear keys or dowels are common practice for slab-on-grade and mat foundations. Examples of this detail are shown below:

Foundation Pinned 01Foundation Pinned 02

When two different slab elements touch each other in RISAFoundation they are assumed to have a full moment connection, as though they were placed monolithically. However, it is easy to specify a pinned connection along the slab edge, so that shear may be transferred between the two slabs but not moment.

In the example below the shared edge between slabs S1 and S2 is fixed, as indicated by its default blue color:

Foundation Pinned 03

To specify that this edge should be pinned, use the Modify Edges tool:

Foundation Pinned 04

Click on the shared slab edge and it will change color, indicating that now only shear can pass between the slabs:

Foundation Pinned 05

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This entry was posted by RISA News on Thursday, February 11th, 2016 at 5:31 pm and is filed under Technical Solutions. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.

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