GTSTRUDL The GTSTRUDL Base Plate Wizard A Module for the Modeling and Analysis of Base Plates Rob Abernathy CASE Center GTSUG June, 2008 Las Vegas, NV

GTSTRUDL GTSUG June, 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.

GTSTRUDL GTSUG June, 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

GTSTRUDL GTSUG June, Running the Base Plate Wizard Will be available in GTSTRUDL 30 Graphical GUI Separate DLL Separate password ‘gtbp’ format files for model recovery and templates

GTSTRUDL GTSUG June, Wizard Organization Menu bar 10 tabbed pages + Additional dialogs Display area

GTSTRUDL GTSUG June, Tabs: Plate Length units Overall dimensions Plate material properties

GTSTRUDL GTSUG June, Tabs: FE Mesh Basic mesh size Mesh adjustments

GTSTRUDL GTSUG June, Tabs: Attachments Add attachments Edit attachments: double-click a column Delete attachments: right-click a column ‘Mirrored’ option for angles

GTSTRUDL GTSUG June, Tabs: Attachments – Add Attachment Select Table and Profile Optional offset Optional rotation in plane Modeling method ‘Edit Attachment’ uses same dialog

GTSTRUDL GTSUG June, Tab: 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.

GTSTRUDL GTSUG June, Tabs: 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

GTSTRUDL GTSUG June, Tabs: Anchors – Add Anchors

GTSTRUDL GTSUG June, Tabs: Anchors - Location Type in coordinates of anchors or use the Anchor Patterns button for automatic location calculation.

GTSTRUDL GTSUG June, Tabs: Anchors – Anchor Patterns Choose a pattern Enter offsets from plate edge Enter the number of any anchors in between the corners

GTSTRUDL GTSUG June, Tabs: 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.

GTSTRUDL GTSUG June, Tabs: Anchors – Axial Stiffness Anchor can be modeled as spring value or a frame member Tension only option Pretension is available for springs

GTSTRUDL GTSUG June, Tabs: Anchors – Shear Stiffness ‘Fixed’ restrains in plane translation – no effect on out-of-plane displacement. ‘None’ means no resistance to in plane translations.

GTSTRUDL GTSUG June, Tabs: Anchors – Allowable Values Specified allowable values allow the BPW to check results for anchors

GTSTRUDL GTSUG June, Tabs: Bearing Surface Choose spring constant type: 1 st two use theory of elasticity formula. Optional gap between the base plate and the bearing surface.

GTSTRUDL GTSUG June, Tabs: 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.

GTSTRUDL GTSUG June, Tab: Constraints Prototype still under development. Constraints force nodes to lie on a line or a point with optional supports. Add, (edit and delete) constraints.

GTSTRUDL GTSUG June, Tab: Constraints – Add Constraint Point or line Optional boundary conditions Can be used to facilitate modeling issues outside of Base Plate Wizard.

GTSTRUDL GTSUG June, Tabs: Constraint – Edit Restraints Select free or restraint type. Fixed + or – modeled with TEN/COMP ONLY members with high axial strength.

GTSTRUDL GTSUG June, Tabs: 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.

GTSTRUDL GTSUG June, Tabs: NL Springs Can be pre-loaded like profiles Enter name (GTS curve name) Optional description Can be assigned to anchors or constraints.

GTSTRUDL GTSUG June, Tabs: Loadings Prototype still under development Type in data or read from files – DBX (member forces or reactions) or.gtpb- style files you create.

GTSTRUDL GTSUG June, Display 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

GTSTRUDL GTSUG June, Display 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.

GTSTRUDL GTSUG June, Menu: 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

GTSTRUDL GTSUG June, Menu: 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

GTSTRUDL GTSUG June, Current 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