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How
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do
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I
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model
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bearings
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with
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uplift?
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Answer:
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Bearings
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with
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uplift
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may
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be
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modeled
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using
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gap
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(compression-only)
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objects.
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In
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that
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these
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objects
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demonstrate
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nonlinear
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behavior,
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nonlinear
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analysis
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must
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be
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specified
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in
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the
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...
...
.
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Additional
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details
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are
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available
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in
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the
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...
...
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(The
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Link/Support
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Element
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-
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Advanced
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>
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Gap
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Property,
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page
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258)
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and
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in
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Verification
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Example
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6-003,
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available
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through
...
Help
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>
...
Documentation
...
>
...
Analysis
...
Verification
...
>
...
Links.
...
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 object with a zero compression limit.
- Link object – Model a link object using the nonlinear hook property.
| Info |
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NOTE: A nonlinear load case must be applied to activate the nonlinear properties of these structural objects, and to characterize uplift behavior. |
How do I know if uplift occurs?
Answer: Review the bearing pressure for various uplift cases to determine whether or not uplift occurs. Regions with zero bearing pressure will indicate uplift.