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couldShells modelmay shellbe elements*modeled* as *simply-supported supportedshells* by inserting short [links|kb:Link] between the slab and theits supporting elementsmembers. These links would be fixed for translational [degrees of freedom|kb:DOF] (DOF), and free for rotational. This procedure results in a model which may be checked easily, since all rotationallinks degreesare ofreadily freedomvisible.

AlternativeAn alternative procedure would beis to disconnect the [joints|kb:Joint] and then use [constraints|kb:Constraint] to constrain only the translational degreesDOF of freedom as follows:

* At each support location, disconnect all joints thatwhich connect the slab to theadjoining wallmembers usingby theselecting "Edit > Edit Points > Disconnect" menu command. This will replace each single joint with two (or more) independent joints, one joint for each connectedcoincident elementmember.

* ConsolidateIf necessary, consolidate these disconnected joints, such that adjacent wallslab elementobjects share a common joint, and adjacent slabsupporting elementsmembers share a common joint.

* Define For each of these consolidated joints, define a [body constraint|kb:Constraint], [equal constraint|kb:Equal constraint], or [weld constraint|kb:Constraint] withamong UX, UY and UZ degrees of freedom for each pair of resulting joints, one joint on the deck and the other joint on the pierDOF.

The first procedure will results in a model that can be easily visually checked as all the links will be readily visible, which is not the case for the alternative approach. Also, the mesh* Ensure that the [mesh|kb:Meshing] for the wallsimply-supported andshell thematches meshthat for the slab should match for the alternative approach.supporting system.


h1. See alsoAlso

* [Modeling a pin connection between crossing members] \- illustrates how to disconnect joints|tutorials:Modeling a pin connection between crossing members] tutorial

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*Related Incidents:*

* {incident:no=24990|comment=Slab moment release (good detailed example!)}
* {incident:no=29985|comment=Modeling buttress dam}
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