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The GTSTRUDL Base Plate WizardThe GTSTRUDL

Base Plate Wizard

A Module for the Modeling and Analysis of Base Plates

A Module for the Modeling and Analysis of Base Plates

Rob AbernathyCASE Center GTSUG June, 2008 Las Vegas, NV

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What is the Base Plate Wizard?What is the Base Plate Wizard?

• Create a Finite Element model of the base plate using SBHQ6 and SBHT6 elements.

• Model attachments, anchors, stiffeners and bearing surface.

• Adjust the model with constraints and cutouts.

• Add loadings by input, DBX files or user-created files.

• Create a Finite Element model of the base plate using SBHQ6 and SBHT6 elements.

• Model attachments, anchors, stiffeners and bearing surface.

• Adjust the model with constraints and cutouts.

• Add loadings by input, DBX files or user-created files.

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What is the Base Plate Wizard?What is the Base Plate Wizard?

• Print or Print Preview• Save the base plate model in .gtbp

format• Create a GTSTRUDL input file• Run the input file from the dialog,

review the model and results in GTMenu.

• Review results in the Wizard with data sheets

• Print or Print Preview• Save the base plate model in .gtbp

format• Create a GTSTRUDL input file• Run the input file from the dialog,

review the model and results in GTMenu.

• Review results in the Wizard with data sheets

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Running the Base Plate WizardRunning the Base Plate Wizard

• Will be available in GTSTRUDL 30

• Graphical GUI

• Separate DLL

• Separate password

• ‘gtbp’ format files for model recovery and templates

• Will be available in GTSTRUDL 30

• Graphical GUI

• Separate DLL

• Separate password

• ‘gtbp’ format files for model recovery and templates

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Wizard OrganizationWizard Organization

Menu bar

10 tabbed pages +

Additional dialogs

Display area

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Tabs: PlateTabs: Plate

• Length units

• Overall dimensions

• Plate material properties

• Length units

• Overall dimensions

• Plate material properties

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Tabs: FE MeshTabs: FE Mesh

• Basic mesh size

• Mesh adjustments

• Basic mesh size

• Mesh adjustments

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Tabs: AttachmentsTabs: Attachments

• Add attachments

• Edit attachments: double-click a column

• Delete attachments: right-click a column

• ‘Mirrored’ option for angles

• Add attachments

• Edit attachments: double-click a column

• Delete attachments: right-click a column

• ‘Mirrored’ option for angles

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Tabs: Attachments – Add AttachmentTabs: Attachments – Add Attachment

• Select Table and Profile

• Optional offset

• Optional rotation in plane

• Modeling method

• ‘Edit Attachment’ uses same dialog

• Select Table and Profile

• Optional offset

• Optional rotation in plane

• Modeling method

• ‘Edit Attachment’ uses same dialog

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Tab: Attachments – Supported ProfilesTab: Attachments – Supported Profiles

• Drop-down Table and Profile menus are user controllable – add or remove

• Standard shapes are Wide Flanges, Tubes, Channels, Tees, Angles, and Pipes

• All AISC hot rolled standard shapes are supplied

• Users can add their own standard shapes or “arbitrary” shapes – a collection of lines to represent built up shapes, etc.

• Drop-down Table and Profile menus are user controllable – add or remove

• Standard shapes are Wide Flanges, Tubes, Channels, Tees, Angles, and Pipes

• All AISC hot rolled standard shapes are supplied

• Users can add their own standard shapes or “arbitrary” shapes – a collection of lines to represent built up shapes, etc.

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Tabs: AnchorsTabs: Anchors

• ‘Add Anchors’ to add anchors to the base plate.

• Select existing anchors to edit or delete

• Use ‘Edit Anchors’ to review full anchor data

• ‘Add Anchors’ to add anchors to the base plate.

• Select existing anchors to edit or delete

• Use ‘Edit Anchors’ to review full anchor data

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Tabs: Anchors – Add AnchorsTabs: Anchors – Add Anchors

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Tabs: Anchors - LocationTabs: Anchors - Location

• Type in coordinates of anchors or use the Anchor Patterns button for automatic location calculation.

• Type in coordinates of anchors or use the Anchor Patterns button for automatic location calculation.

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Tabs: Anchors – Anchor PatternsTabs: Anchors – Anchor Patterns

• Choose a pattern

• Enter offsets from plate edge

• Enter the number of any anchors in between the corners

• Choose a pattern

• Enter offsets from plate edge

• Enter the number of any anchors in between the corners

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Tabs: Anchors – Physical PropertiesTabs: Anchors – Physical Properties

• Physical Properties are not required for anchors specified with spring values.

• The ‘Coupler’ option allows for two diameters for frame-type members

• ‘By reference’ will allow you to select from a table of anchor properties. This table is user generated.

• Physical Properties are not required for anchors specified with spring values.

• The ‘Coupler’ option allows for two diameters for frame-type members

• ‘By reference’ will allow you to select from a table of anchor properties. This table is user generated.

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Tabs: Anchors – Axial StiffnessTabs: Anchors – Axial Stiffness

• Anchor can be modeled as spring value or a frame member

• Tension only option

• Pretension is available for springs

• Anchor can be modeled as spring value or a frame member

• Tension only option

• Pretension is available for springs

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Tabs: Anchors – Shear StiffnessTabs: Anchors – Shear Stiffness

• ‘Fixed’ restrains in plane translation – no effect on out-of-plane displacement.

• ‘None’ means no resistance to in plane translations.

• ‘Fixed’ restrains in plane translation – no effect on out-of-plane displacement.

• ‘None’ means no resistance to in plane translations.

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Tabs: Anchors – Allowable ValuesTabs: Anchors – Allowable Values

• Specified allowable values allow the BPW to check results for anchors

• Specified allowable values allow the BPW to check results for anchors

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eaallowact )/S(S)/TTRatio (

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Tabs: Bearing SurfaceTabs: Bearing Surface

• Choose spring constant type: 1st two use theory of elasticity formula.

• Optional gap between the base plate and the bearing surface.

• Choose spring constant type: 1st two use theory of elasticity formula.

• Optional gap between the base plate and the bearing surface.

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Tabs: StiffenersTabs: Stiffeners

• No prototype available

• Stiffeners are modeled as a single line

• May be modeled as RIGID or FE extension

• If extension, may have variable height

• May be connected to an attachment.

• No prototype available

• Stiffeners are modeled as a single line

• May be modeled as RIGID or FE extension

• If extension, may have variable height

• May be connected to an attachment.

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Tab: ConstraintsTab: Constraints

• Prototype still under development.

• Constraints force nodes to lie on a line or a point with optional supports.

• Add, (edit and delete) constraints.

• Prototype still under development.

• Constraints force nodes to lie on a line or a point with optional supports.

• Add, (edit and delete) constraints.

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Tab: Constraints – Add ConstraintTab: Constraints – Add Constraint

• Point or line

• Optional boundary conditions

• Can be used to facilitate modeling issues outside of Base Plate Wizard.

• Point or line

• Optional boundary conditions

• Can be used to facilitate modeling issues outside of Base Plate Wizard.

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Tabs: Constraint – Edit RestraintsTabs: Constraint – Edit Restraints

• Select free or restraint type.

• Fixed + or – modeled with TEN/COMP ONLY members with high axial strength.

• Select free or restraint type.

• Fixed + or – modeled with TEN/COMP ONLY members with high axial strength.

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Tabs: CutoutsTabs: Cutouts

• Prototype still under development.• A cutout is a closed polygon that is

excluded from the FE model.• Cutouts can be used to model skewed

plates.

• Prototype still under development.• A cutout is a closed polygon that is

excluded from the FE model.• Cutouts can be used to model skewed

plates.

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Tabs: NL SpringsTabs: NL Springs

• Can be pre-loaded like profiles

• Enter name (GTS curve name)

• Optional description

• Can be assigned to anchors or constraints.

• Can be pre-loaded like profiles

• Enter name (GTS curve name)

• Optional description

• Can be assigned to anchors or constraints.

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Tabs: LoadingsTabs: Loadings

• Prototype still under development

• Type in data or read from files – DBX (member forces or reactions) or .gtpb-style files you create.

• Prototype still under development

• Type in data or read from files – DBX (member forces or reactions) or .gtpb-style files you create.

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DisplayDisplay

• Plate origin is red square in lower, left

• Y axis is vertical, X is horizontal, Z comes out of the screen.

• Scales on left and bottom

• Current element and joint count at top

• Plate origin is red square in lower, left

• Y axis is vertical, X is horizontal, Z comes out of the screen.

• Scales on left and bottom

• Current element and joint count at top

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DisplayDisplay

• Attachment centroid is marked with a small cross in attachment color. This is the point where loads are applied to an attachment.

• Anchor center is marked with small square – if a diameter is specified, a circle is drawn in anchor color.

• Stiffeners are drawn as a line in the stiffener color.

• Constraints are drawn as a line with each joint in the constraint marked with a small box in the constraint color.

• Cutouts are outlined in the cutout color and no elements are displayed inside the cutout.

• Attachment centroid is marked with a small cross in attachment color. This is the point where loads are applied to an attachment.

• Anchor center is marked with small square – if a diameter is specified, a circle is drawn in anchor color.

• Stiffeners are drawn as a line in the stiffener color.

• Constraints are drawn as a line with each joint in the constraint marked with a small box in the constraint color.

• Cutouts are outlined in the cutout color and no elements are displayed inside the cutout.

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Menu: FileMenu: File

• Create a GTSTRUDL input file based on the current state

• Read an existing .gtbp file• Create a .gtbp file• Print the current display• Launch the Scope Editor with the current

display

• Create a GTSTRUDL input file based on the current state

• Read an existing .gtbp file• Create a .gtbp file• Print the current display• Launch the Scope Editor with the current

display

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Menu: ResultsMenu: Results

• If analysis and results are requested in the input file, results can be reviewed in the BPW

• Data sheet style format• ‘Bearing surface’ uses the new LIST

PRESSURE command output

• If analysis and results are requested in the input file, results can be reviewed in the BPW

• Data sheet style format• ‘Bearing surface’ uses the new LIST

PRESSURE command output

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Current Wizard limitsCurrent Wizard limits

• 10 Attachments• 100 lines for each attachment• 1000 Anchors• 50 constraints• 1 line per constraint• 10 cutouts• 10 lines per cutout• 21 points in NLS curve• 1 bearing surface K value

• 10 Attachments• 100 lines for each attachment• 1000 Anchors• 50 constraints• 1 line per constraint• 10 cutouts• 10 lines per cutout• 21 points in NLS curve• 1 bearing surface K value