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This page is devoted to frequently asked questions (FAQ) related to [ |kb:auto lateral load]. {info} \\ {on-this-page} h1. Modeling and application h2. How do I assign wind. |
Modeling and application
How do I assign wind auto-lateral-load
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conditions?
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ANSWER:
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Wind
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may
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be
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assigned
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as
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follows:
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- Define
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- the
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- wind
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- auto
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- lateral
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- load.
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- Assign wind-pressure
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- coefficients
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- using
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- the
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- Assign
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- >
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- Area
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- Loads
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- >
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- Wind
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- Pressure
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- Coefficients
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- option.
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Is it possible to apply wind load to only a specific frame object?
ANSWER: Yes, wind load may be applied to specific frame objects through the process which follows:
- Define a load pattern, designate the type as Wind, and specify the load as an auto-lateral-load pattern, such as with ASCE 7-05.
- Select Modify Lateral Load Pattern > Exposure from Frame and Area Objects > Include Frame Objects, and define wind-direction angle, along with other parameters.
- Designate the frame objects for wind auto-lateral-load application through Assign > Frame Loads > Open Structure Wind Parameters.
How is wind load applied per BS standard?
Extended Question: For modeling a (FPSO) unit as a 3D frame system, how would I apply wind load per BS standard? The Wave Wind form is limited to API standard, and I'm concerned that diaphragm definition would affect analysis.
ANSWER: Two options are available, described as follows:
- Define dummy diaphragms then assign each to a single point object. Each point object then becomes the location where wind load is applied. Tributary area is specified using the Wind Exposure Width Data form.
- Alternatively, use dummy area objects to apply wind loads using exposure from area objects. This may be specified using the BS 6399-95 Wind Load Pattern menu.
Display
Is it possible to display auto-lateral-load application?
ANSWER: Yes, auto lateral load may be displayed. The seismic auto-lateral-load pattern applied to structural joints, for example, may be reviewed in tabular format under Model Definition > Load Pattern Definitions > Auto Seismic Loads > Table: Auto Seismic Loads to Joints.
Formulation
How do I find the period used to calculate the auto-seismic load?
ANSWER: All parameters, including structural period, are reported in the table available through Load Pattern Definitions > Auto Seismic Load.