GTSTRUDL
GTSTRUDL
Upcoming Version 31 Release and
Version 32 Release
Dr. Kenneth M. (Mac) Will

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Presentation Outline
• Status of Version 31
• New Features in Version 31
• Features planned for Version 32
• Beyond Version 32

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Status of Version 31
• QA is in progress.
• Documentation is in progress.
• Plan to ship in August.

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Version 31

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DBX
• The WRITE ELEMENTS ATTRIBUTES command now reports the number of elements not included in the generated DBX file due to missing element properties.
Previously, only the total number of complete element attributes written was reported.

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Dynamics
• The LIST DYNAMIC PARTICIPATION
FACTORS Command was given the ability to output the mass participation factors in a tabulated form sorted by mode, by one of the global directions, or by each one of the global directions. By default, the output will only show active modes. However, the user can specify if the output should include all modes. The command can also output only totals in each global direction.

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Dynamics (cont)
• The ACTIVE/INACTIVE MODES
Command has been enhanced to automatically Activate/Inactivate modes according to minimum target of mass participation factors given for each global direction.
An example of the enhanced LIST
DYNAMIC PARTICIPATION FACTOR
AND INACTIVE MODE commands is shown on the next slide.

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General (cont)
• The efficiency of the LIST MAXIMUM JOINT
DISPLACEMENTS and LIST MAXIMUM
REACTIONS commands has been dramatically improved when the analysis results are stored on external save files using the GTSES/GT64M sparse equation solvers. For jobs consisting of large models with tens and even hundreds of loading conditions, the time to execute these commands has decreased from an hour or more for the largest jobs to a few minutes at most.

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General (continued)
• The MATERIAL command now respects the EXISTING
MEMBERS ONLY and the EXISTING ELEMENTS
ONLY options for a member list. Previously, the ONLY specification was ignored and the material properties (E,
DENSITY, etc.) were assigned to all members and elements in the EXISTING list.
Example:
MATERIAL CONCRETE ELEMENTS EXISTING -
ELEMENTS ONLY

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General (continued)
• The EXISTING option for lists now works with load names. Previously, only LOAD LIST would recognize
EXISTING, although the options of BUT and PLUS were not recognized, but no other load name list recognized the
EXISTING option.
Example:
PRINT LOAD DATA LOADS EXISTING BUT 100

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General (continued)
• The CALCULATE PRESSURE command has been improved by the addition of support for analysis results stored in files, created by the execution of linear and nonlinear static analyses using the GTSES/GT64M sparse equation solvers.
• The COUTPUT command will now assume COUTPUT standard if an invalid file name is specified. An invalid file name can be due to illegal characters in the name, or restrictive permissions on the folder where the file is attempting to open.

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GTMenu
• The Split Member option now allows a member list to be built using all settings in the Mode Bar.
Previously, only the Hit and List modes were available.
• When entering GTMenu, the structure is now drawn only once. For large models, multiple draws slowed down the entry into GTMenu.
• A Current Group must now be selected before
Current Group options are made active.

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GTMenu (continued)
• A message is now given when Check Model results are written to a file.
• The efficiency of Color by Section has been improved for large models.
• The cursor now displays as an hourglass when the structure is being redrawn.

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GTMenu (continued)
• When entering GTMenu from command mode with members which have pipe properties, the property group for a pipe section is now named according to the PIPE dimensions: Outer Diameter x THIckness. The name is generated in inches if the units are English, and the name is generated in millimeters if the units are Metric.
• Also, for the Display Model Section Names, a pipe descriptor will be used such as 660x25 for a pipe with a 660 mm OD and a 25 mm wall thickness.
The Display Model Color by Section will use the same descriptor. Examples on next slides.

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Display Model
Section Names for
Pipes

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Display Model
Color by Section with
Section Names for Pipes

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GTMenu (continued)
• The Color by Section Legends (both the scrolling box and the graphics screen legend) have been enhanced to fully display the specifications of a variable section: that is, the length and type of each segment (in current units where applicable) are given.
An example of an offshore structure is shown on the next slide.

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Sample Property Legend for
Variable Members

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GTSTRUDL Output Window
• The Deletions dialog (Modeling –
Data Management –
Deletions) has been expanded to include data for finite elements and groups.

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Output Window (cont)
• In the Area Load dialog, Individual buttons for ‘One way
X’ and ‘One way Z’ have been added. The
Custom option is the old method, where the user was required to enter at least one value in the X or Z box.

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Output Window (cont)
• The 'All' option has been removed from the
File -> Save menu. The 'All' option activated the first three Save options only, which was confusing to some users. Now, click on each option separately if more than one type of Save is desired.

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Output Window (cont)
• In the Command window (Text Mode), when the Paste buffer is more than 10 lines, only the first 10 lines of the buffer are displayed for verification. Previously, all lines in the Paste buffer were displayed, which could result in a dialog where the Yes and No buttons were off the screen for very large Paste buffers.

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Output Window (cont)
• Example of pasting input into
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Output Window

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Model Wizard
• The Continuous Beam Wizard has been enhanced to include a Moving Load page and an Automatic Load
Combination page. In addition, the default support condition at X = 0.0 will be pinned, instead of fixed.
Examples of the new dialogs are shown on the next slide.

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Model Wizard (cont)
New Moving Load dialog
New Moving Load
Combination dialog

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Model Wizard (cont)
• The Vault/Rectangular Tank Wizard now includes the option to add a top as shown in the dialog below and on the next slide.

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Model Wizard (cont)

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Model Wizard (cont)
• You can now add pressure to the top and the sides of the tank using the new dialog shown. The side pressure allows you to model a surcharge loading.

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Model Wizard (cont)
• The Plane Frame Wizard now includes new bracing types:
– Inverted Chevron Braces with offsets and eccentricities
– Left and right Diagonal braces with eccentricities
– Knee braces
Examples of these new bracing types are shown on the next slides

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Model Wizard (cont)
New Bracing dialog

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Chevron
Centered
Chevron
Eccentric
Chevron Inverted and
Eccentric

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Chevron with Offset Chevron Inverted and
Offset
Diagonal with Left
Eccentric

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Knee Braces
Model with Mixed
Bracing Types

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Model Wizard (cont)
• Different properties can be specified for link beams

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Model Wizard (cont)
• Variable bracing can be specified by bay

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Model Wizard (cont)
• The Model Wizard now adds SET
ELEMENTS HASHED to all models with more than 300 joints. Previously, only the
Vault and Space Frame Wizards added this command. SET ELEMENTS HASHED speeds up the processing of commands for large input files.

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Nonlinear
• Support for nonlinear geometric behavior has been implemented for the SBHQ, SBHQ6, SBHT, and
SBHT6 plate finite elements. The nonlinear geometric behavior capability is designated for these elements by the NONLINEAR EFFECTS command in a manner identical to way it is done for frame and truss members. This capability is only available for the GTSES solver option.

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Nonlinear (cont)
• An example of accounting for the geometric nonlinear behavior using these elements in a pushover analysis on a square simply supported plate with a uniform load is shown below:
Nonlinear Effects
Geometry elements 1 to 144
End
Active Solver GTSES
An example of a simply supported plate and its response are shown on the next slide

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Nonlinear (cont)
Simply supported plate with uniform pressure
Plot of Pushover Analysis Results
Nonlinear vertical displacement at center

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Nonlinear (cont)
• Nonlinear analysis has been extended to support the
GTSES sparse equation solver. The GTSES solver is executed for nonlinear static analysis when the
NONLINEAR ANALYSIS GTSES command is given or when the ACTIVE SOLVER GTSES command is given prior to any NONLINEAR ANALYSIS commands. When nonlinear analysis uses the GTSES solver, it also stores the analysis results into files, rather than in memory. The
GTSES solver in conjunction with the storage of results in files provide nonlinear static analysis with the ability to solve significantly larger problems with much greater speed and efficiency.
An example of the performance improvement using the
GTSES solver is shown on the next slide

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Nonlinear (cont)
• Industrial Building Model
# of joints
# of members
# of active loads
# of DOFs
=
=
2900
6300
= 73
= 18000
Time for nonlinear analysis, GTSES =
Time for nonlinear analysis, Standard (V30) =
14.0 min.
240.0 min.
Average Time/Loading, GTSES =
Average Time/Loading, Standard (V30) =
11.5 sec.
197.0 sec.

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Nonlinear (cont)
• The PERFORM PUSHOVER ANALYSIS command has been enhanced with the addition of the GTSES option, which indicates that the GTSES sparse equation solver shall be used for the execution of the nonlinear analysis steps of the pushover analysis procedure. The PERFORM
PUSHOVER ANALYSIS command also uses the GTSES solver when the ACTIVE SOLVER GTSES command is given prior to the PERFORM PUSHOVER ANALYSIS command.

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Nonlinear (cont)
• The PERFORM CABLE PRESTRESS ANALYSIS command has been enhanced with the addition of the
GTSES option, which indicates that the GTSES sparse equation solver shall be used for the execution of the nonlinear analysis steps of the cable prestress analysis procedure. The PERFORM CABLE PRESTRESS
ANALYSIS command also uses the GTSES solver when the ACTIVE SOLVER GTSES command is given prior to the PERFORM CABLE PRESTRESS ANALYSIS command.

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Offshore
• A new
API Recommended Practice 2A-
WSD (RP 2A-WSD), Twenty-First Edition steel design code for Basic and Hydrostatic
Pressure stresses check has been implemented as a prerelease feature. This new code, APIWSD21, may be used to select or check Circular Hollow Sections
(Pipes).

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Offshore (cont)
• A new
API Recommended Practice 2A-
WSD (RP 2A-WSD), Twenty-First Edition steel design code for Punching Shear check has been implemented as a prerelease feature. This new code, APIWSD21, may be used to check or design Circular Hollow
Sections (Pipes).

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Reinforced Concrete
• The ACI 318-05 reinforced concrete code has been added. The command format is
METHOD ACI 318-05 (SEISMIC)
The ACI 318-05 code support all options included with 318-89 including special moment frame detailing according to
Chapter 21 if requested.

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Steel Design
• The steel design code AISC13, which is based on the Steel Construction Manual
AISC Thirteenth Edition, is moved to release status. The AISC13 code utilizes the
Load and Resistance Factor Design (LRFD) techniques of the AISC Specification and also the safety factor Ω has been implemented for the Allowable Strength
Design (ASD).A summary of the features are shown on the next slide.

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Steel Design (cont)
• The AISC13 code of GTSTRUDL may be used to select or check any of the following shapes:
Design for bi-axial bending and axial forces:
I shapes
Channels
Tees
Single Angles
Double Angles
Square Bars
Round Bars
Rectangular Bars
Design for bi-axial bending, axial, and torsional forces:
Round HSS (Pipes)
Rectangular and Square HSS (Structural Tubes)

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Steel Design (cont)
• A new ANSI/AISC N690,
American
National Standard Specification for the
Design, Fabrication, and Erection of Steel
Safety-Related Structures for Nuclear
Facilities, 1994 Edition, has been implemented as a released feature. This new code, N690-94, may be used to select or check any of the shapes on the next slide.

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Steel Design (cont)
• Design for axial force and bi-axial bending:
I shapes
Channels
Single Angles
Tees
Double Angles
Round Bars
Pipes
Square and Rectangular Bars
Structural Tubing

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Steel Design (cont)
• New ASME,
Boiler and Pressure Vessel
Code, Section III, Rules for Construction of
Nuclear Power Plant Components. Division
I - Subsection NF Component Supports,
2004 and 2007 Editions with their respective addenda, have been implemented as released features. These new codes, NF-2004 and NF-2007, may be used to select or check any of the shapes on the next slide.

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Steel Design (cont)
• Design for axial force and bi-axial bending:
I shapes
Channels
Single Angles
Tees
Double Angles
Round Bars
Pipes
Square and Rectangular Bars
Structural Tubing

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Steel Design (cont)
• Results of a steel code check or select using the MAXIMUM ENVELOPE option of the
CHECK and SELECT commands are now available in the code check results datasheet, the view code check results in
GTMenu, and the LIST CODE CHECK
RESULTS command.

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Steel Design (cont)
• A new feature has been added to the steel design CHECK and SELECT commands to check the user specified parameters to see if they are valid for the requested design code (i.e., AISC13, ASD9, EC3-2005, N690-94, NF-2007, etc.).
This new feature has been implemented due to anticipating that a user may take an existing model based on the ASD9 code and now modifying the model to perform a code check based on the AISC13 code. This new feature starts checking user specified parameters for the requested code at the beginning of the CHECK or SELECT command. If there is any user specified parameters that do not apply to the specified design code, a warning message with a list of parameters that are not applicable is printed.

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Steel Design (cont)
• A new
Eurocode 3, EN 1993-1-1: 2005 (E) steel design code has been implemented as a prerelease feature. This new code, EC3-
2005, may be used to select or check any of the following shapes:

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Steel Design (cont)
Design for axial force and bi-axial bending:
I shapes
Circular Hollow Sections (Pipes)
Rectangular Hollow Sections (Structural Tube)
Solid Round Bars
Design for axial force only:
Single Angles
Double Angles

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Steel Tables and GTTABLE
• New Metric Tables from AISC Thirteenth
Edition have been added to GTSTRUDL.
• The GTTABLE commands have been modified to accept long profile names.
Also, the GTTABLE output has been modified to display both long and short profile names.

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Utility Programs
• GTS2ACAD (GTSTRUDL to AutoCAD) has been upgraded to version 4.2. Twodimensional elements with mid-side nodes are now processed.
Elements with mid-side nodes now processed are:
Triangles: LST, UTLQ1
Quads: IPQQ, IPCQ, IPQLQ1, IPQLQ2,
IPQLQ2B, IPQLQ3, IPQLQ4, IPBQQ

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Base Plate
• Metric units
“Millimeters” has been added to the Plate tab.
• Attachment placement offset can now be specified from the plate origin as well as the plate center in the
Attachment dialog.

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Base Plate (cont)
• Attachments modeled as FE extensions may be loaded at the extension end or at the plate surface.
This is done in the
Add Attachment dialog.

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Base Plate (cont)
• Comments in the generated .gti file have been expanded.
• The BPW now prompts to save a .gtbp file if changes to the plate have been made.
• Current unit display has been added to dialogs that previously only had a bare edit box. Current units display has also been added to the results datasheets.

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Base Plate (cont)
• The AISC 9 th Edition metric profile names have been added as available attachments.
• When a .gtbp is read or saved, its name is added to the BPW window title and the file name is used as the default .gti file in the
GTSTRUDL Input File options dialog.

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Base Plate (cont)
• A ‘Print load data’ option has been added to the Results
Summary dialog.
• A ‘Write to File’ option has been added to the individual result datasheets.

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Base Plate (cont)
• Plate stresses now include principle stresses
S1, S2, Tmax and the Von Mises criteria.
Also, sorting options have been added to the
Plate Stress datasheet.

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Base Plate (cont)
• The Anchor Results datasheet now includes options to organize anchor results by anchor or by load.
Results ordered by
Anchor
Results ordered by
Load

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Base Plate (cont)
• The Plate Displacements datasheet now offers two sorting options, by ‘Lift off’ (+Z displacement) or by ‘Depress’ (-Z displacement).

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Version 32

GTSTRUDL
Version 32 – Base Plate
• Add ANCHOR commands to BASE Plate module.
– modeling and capacity check by ACI 318-05.
Commands can be user created or by the Base
Plate Wizard.

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• Add WRITE CODE CHECK RESULTS.

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• Implement the GT64M Lanczos eigenvalue analysis method, which is a 64-bit, high-performance sparse equation solution method.
• Implement a GTSES version of linear direct integration
(physical) transient analysis.
• Computation of minimum seismic load according to latest
IBC provisions.

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• A new eight node solid element with incompatible modes will be implemented. This element will offer substantially improved accuracy over the existing eight node solid element for structures with bending and shear deformation. The element will include all of the features currently available with the current eight node solid (IPSL) element.

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• New eight node moderately thick six degree of freedom flat plate element with the following capabilities:
– Surface, temperature, and body forces
– Lumped and Consistent Mass matrix for dynamic analysis
– Geometric stiffness for linear buckling analysis
– Standard finite element output – LIST,
CALCULATE AVERAGE
– Integration into GTMenu (geometry, loads, input file, contour results)

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• Implement local element coordinate system results processing (text reports and graphical display of stress contours) for selected planar elements, in particular the
SBHQ and SBHT family of plate elements.
This is particularly convenient and useful for structures formed by surfaces of revolution.

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• Add command to PRINT BETA ANGLES list (in addition to the current PRINT MEMBER CONSTANTS command).
• Add sorting and limits to LIST CODE CHECK RESULTS
• PRINT JOINT CONNECTIVITY and form a Group of the members and elements incident on joints in a list.
• PRINT INCIDENT JOINTS MEMBERS/ELEMENTS command to print the joints incident to a list and create a
GROUP.
• When second and subsequent JOINT LOADS are applied to a joint in a loading condition, the WARNING will change to INFO.

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• LOCATE FLOATING JOINTS ( (AND) -REMOVE )
Only joints that are not attached to any member, finite element, nonlinear spring or rigid body will be considered as possible “floating” joints. If a joint is used as a BETA REFERENCE JOINT it will not be considered “floating”.
• LOCATE DUPLICATE ELEMENTS ( (AND) REMOVE (ADD
LOADS) ).
Similar to LOCATE DUPLICATE MEMBERS.
• LOCATE INTERSECTING MEMBERS list TOL v
Detect members within a tolerance (TOL) of each other to locate
“crossing” members that may look correct graphically but should actually have a common joint at their intersection.
• Add finite elements to LOCATE INTERFERENCE JOINTS.

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• Add the ability to write or change support status as part of the CALCULATE SOIL SPRINGS command. Currently, user must have already specified joints as supports and joint releases.
• The AASHTO HL-93 truck will be added to the Moving
Load Generator.
• Add additional cross sections to the MEMBER
PROPERTIES command similar to the I-Shape and Pipe cross sections for Tubes, Channels,…etc.
• A new option will be added to the PRINT MEMBER
PROPERTIES command to print all cross-sectional property information.

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• AREA LOAD enhancements
Check for interference joints and intersecting members in plane before attempting to locate bounded areas.
Improve error reporting:
List of 0.0 length members
Start joint for "illegal configuration" to help with debugging.
Add IGNORE NONORTHOGONAL MEMBERS option.
Ignore members not within specified angle of global axis so bracing doesn’t need to be inactivated.
PLOT option - create a Scope Editor file like the dialog display with shaded bounded areas.

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Version 32 - GTMenu
• Add Undo to remove duplicate joints dialog to avoid corrupting model due to using a tolerance which was too large.
• Add the ability to automatically split members which are in the model when the finite element mesh is refined. The new dialog is shown on the next slide.

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New option to split members while refining FE mesh

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Version 32 – GTMenu (cont)
• Display additional steel design parameters:
LX, FRLX, FRLY, FRLZ, FRUNLCF,
TBLNAM, Yield Strength, Tensile
Strength
New dialog is shown on next slide.

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Additions to Display
Paramters Dialog

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Version 32 – GTMenu (cont)
• Implement automatic mesh algorithm for
2D elements to mesh structure using only structure outline including internal boundaries and line constraints.
The new meshing dialog is shown on the next slide with several examples on subsequent slides.

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New Meshing Dialog
Define External Boundaries
Define Internal Openings
Define Constraint Lines
Set the Mesh Size

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Model with External
Boundaries and Internal
Constraint Line
(Uses Construction Points and Lines)

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Resulting Mesh
Constraint Line

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Model with External and Internal Boundary
(uses Constructions Points and Lines

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Resulting Mesh

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Version 32 – GTMenu (cont)
• Redraw solid will display the nine Unistrut sections in the GTSTRUDL Unistrut table as shown on the next slide

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Version 32 – GTMenu (cont)
• Ability to click on a member and have a graphical summary of the results on just that member in a separate Window that can be printed.

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Version 32 – GTMenu (cont)
• A new Property Group can be added when you are creating members.
• Finite elements will be labeled closer to their centroid.
• Label duplicate joints, members, or elements on screen.
• Label floating joints on screen.

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Version 32 – GTMenu (cont)
• The user will be able to change the colors used for contour plots.
Change colors for contouring
• Different colors can be used for members and finite elements for the deformed structure, mode shapes and transient animation as shown on next slide.

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You may also change the color used for annotation
(labels and legends)
Different colors for members and elements in Deformed
Structure, Mode Shape, and
Transient Animation displays

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Version 32 – GTMenu (cont)
• Dynamic mass specified using the
INERTIA OF JOINTS command can be displayed.
• Example on next slide

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Dynamic mass from Inertia of
Joints from Load command

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Version 32 – GTMenu (cont)
• New Mode Bar selection called
Rect(angular) Fence which allows you to select entities within the rectangular fence

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Rectangular
Fence

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Version 32
GTSTRUDL Output Window
• Track Warning messages like Error messages. Pop-up a dialog with Error and
Warning count. List Error or Warning output lines in a dialog, click on an Error or
Warning and the output cursor moves to that line in the output listing.

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• The nonlinear member end connection and plastic hinge models will be supported by nonlinear dynamic analysis.
• Add nonlinear viscous damper element for nonlinear dynamic analysis

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Version 32 – Offshore
• Move API 2A-WSD 21 st edition code to release status.
• Implement ISO 19902:2007(E),
International Standard for Petroleum and
Natural Gas Industries – Fixed Steel
Offshore Structures.
• Implement fatigue analysis based on transient analysis results.

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• The ACI 318-08 code will be implemented for beam and column design.
• The DESIGN SLAB command will be brought to release status.

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• Move Eurocode EC3- 2005 code to release status.
• Add new parameter called ‘DesLoads’ which can be used to specify design loads.
• Add an option to create a group containing the critical loads at the end of a CHECK or
SELECT command.

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• Add a new option to the CHECK and
SELECT commands to print the load names and section location used for the code check.
• Displacement Constraint Design Procedure will be available to select members to satisfy joint displacement constraints. The new GTSES external file solver will be added as an option.

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Interfaces to Other Programs
• AutoCAD – interface via DXF converter
• Intergraph’s Frameworks
• Intergraph’s SmartPlant 3D – CIS/2
• Structural Desktop by Structural Desktop,
Inc
• Tekla Structures
• New interface under development with our agent in Europe
• Other CAD programs which support DXF or CIS/2

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Beyond 32

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Future Enhancements
• Multiple windows to allow for result display in a separate window than the model display.
• Graphically specify joints and elements in GTMenu to be used to obtain output from the LIST SUM FORCES capability.
• Graphically specify Area Loads in GTMenu.

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Future Enhancements (cont)
• Addition of the following items to the input file created by GTMenu:
– Dynamic Loadings
– Eigen Parameters
– Dynamic Modal Damping Data
– Nonlinear Effects
– Nonlinear Spring Properties
– Nonlinear Solution Parameters
– Cable Network Data

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Future Enhancements (cont)
• Implement AISC 2010 steel design code with new tables.
• Implement AISC 2010 seismic provisions.
• Develop complete 64 bit version of
GTSTRUDL.

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Your assistance is needed to help us improve
GTSTRUDL in your Committee meetings :
• Please provide us with a prioritized list of the features that you would like to see. Please be specific especially when requesting model wizard, design codes (which codes and which cross sections) or datasheet requests.
Sketches of wizards, output, and graphical displays help us tremendously as evidenced by the recent enhancements to the Model Wizard which are a result of input from the User Interface Committee.