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\\h2. How do I model bearings with uplift?

*Answer:* Bearings with uplift* may be modeled using [nonlinear|kb:Nonlinear] gap (compression-only) [link|kb:Link] objects. In that these objects demonstrate nonlinear behavior, nonlinear analysis must be specified in the [load case|kb:Load case]. Additional details are available in the {new-tab-link:http://www.csiberkeley.com/}CSI{new-tab-link} [_Analysis Reference Manual_|doc:CSI Analysis Reference Manual] (The Link/Support Element - Advanced > Gap Property, page 258) and in Verification Example 6-003, available through Help > Documentation > Analysis Verification > Links.


h2. How do I model a tension pile when uplift forces exceed dead load?

*Answer:* To model a pile for the case in which it resists only tension, and not compression, two options are available, described as follows:

* *Frame object* -- Model a [frame|kb:Frame] object with a zero compression limit.

* *Link object* -- Model a [link|kb:Link] object using the nonlinear hook property.

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*NOTE:* A nonlinear [load case|kb:Load case] must be applied to activate the nonlinear properties of these structural objects, and to characterize uplift behavior.
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*Related Incident:*
* {incident:no=46794|comment= tension pile modeling}
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