GTSTRUDL Upcoming Version 32 Release and Future Enhancements

1
GTSTRUDL Upcoming Version 32 ReleaseandFuture
Enhancements

• Dr. Kenneth M.(Mac) Will
• GTSUG 2011
• June 2011
• Delray Beach, Florida

2
Presentation Outline

• Status of Version 32
• New Features in Version 32
• Future Enhancements

3
Status of Version 32

• Beta testing scheduled for August.
• Documentation is in progress.
• Plan to ship in October.

4
Version 32
5
DBX

• WRITE CODE CHECK RESULTS has been added. This
  DBX file contains the same data as found in the
  output from LIST CODE CHECK RESULTS. ASCII80 and
  BINARY sequential formats are supported.

6
DBX

• Syntax
• WRITE CODE (CHECK) (RESULTS) -(MEMBERS list)
• Examples
• WRITE CODE ALL MEMBERS
• WRITE CODE RES MEMBERS EXISTING - 1 TO 1000

7
DBX

• The WRITE CABLE FORCES command has been added to
  the DBX feature. This DBX file contains the
  normal stress, the corresponding normal force,
  and the three global element nodal reaction
  components at each node for all active static
  loadings. All documented file formats and access
  modes are supported.

8
DBX (cont)

• Syntax
• WRITE CABLE FORCES (MEMBERS list)
• Examples
• WRITE CABLE FORCES ALL MEMBERS
• WRITE CABLE FORCES MEMBERS EXISTING - 1 TO 1000

9
Dynamics

• The GT64MLANCZOS eigenvalue analysis solution
  method has been implemented, extending
  high-performance sparse-equation eigenvalue
  analysis to 64-bit computer platforms.

10
Dynamics (cont)

• GT64MLANCZOS is the most powerful version of the
  GTLANCZOS family of eigenvalue analysis solution
  methods (GTLANCZOS, GTSELANCZOS, and now
  GT64MLANCZOS) presently available in GTSTRUDL and
  incorporates the following features

11
Dynamics (cont)

• The Lanczos iteration process employs an in-core,
  single processor version of the GT64M sparse
  equation solver. Multiple processors and
  out-of-core processing are not available in this
  initial implementation for Version 32.

12
Dynamics (cont)

• All computations associated with the Lanczos
  iteration process take advantage of 64-bit
  addressing on 64-bit platforms, greatly
  increasing the number of degrees of freedom that
  can be treated and the number of modes that can
  be computed when compared to the GTLANCZOS and
  GTSELANCZOS methods. There is also a modest
  increase of solution speed when compared to the
  GTSELANCZOS method, but this becomes less
  apparent as the number of modes increases.

13
Dynamics (cont)

• The GT64MLANCZOS method is activated when the
  GT64M option is specified by the ACTIVE SOLVER
  command
• ACTIVE SOLVER GT64M
• or when the GT64MLANCZOS method is specified in
  the EIGENSOLUTION PARAMETERS command
• EIGENSOLUTION PARAMETERS
• SOLVE USING GT64MLANCZOS

14
Dynamics (cont)

• Example of problem run using GT64MLANCZOS which
  could not be executed using 32 bit eigensolvers
• Dynamic DOF 329,994
• Number of Modes 300
• Total time to solve 1,693 sec
• Total time to check solution 182 sec
• Virtual memory used appx. 6 GB

15
Dynamics (cont)

• Modest efficiency and performance improvements
  have been made to the GTSES Lanczos eigenvalue
  analysis procedure (GTSELANCZOS). However,
  GTSELANCZOS remains a single-processor, 32-bit
  solver governed by 32-bit virtual memory
  allocation and addressing limitations.

16
Finite Elements

• A new eight node solid element with incompatible
  modes will be available (IPSLIM). 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.

17
Finite Elements (cont)

• A new four node plane stress quadrilateral with
  three dof (including drilling dof) will be added
  Q6CDRL
• A new four node moderately thick plate bending
  element will be added PBMITC
• A new four node moderately thick plate element
  (stretching and bending) with 6 dof will be added
  -
• SBMITC Q6CDRL PBMITC

18
General (cont)

• PRINT MEMBER LENGTH SORTED LIMIT v now prints the
  total number of members that meet the specified
  limit after the list of member lengths.
• This only applies to LIMITS with decimal
  numbers, which indicates a length value and where
  the number of members meeting the criterion is
  unknown, and not to LIMITS with an integer
  number, which indicates a specified number of
  member lengths to print.

19
General (continued)

• Example
• 4367 gt UNITS CM
• 4368 gt PRINT MEMBER LENGTH SORTED LIMIT 20.0
• (output omitted)
• INFO_PRTMBL - Found 10 members lt
  20.000

20
General (continued)

• A new option has been added to the PRINT command,
  PRINT MEMBER BETA ANGLES, which allows you to
  print only BETA angles, without the other
  CONSTANTS.
• The command syntax and a few examples are shown
  on the next slide.

21
General (continued)

• Syntax
• Examples
• PRINT MEMBER BETA ANGLES NONZERO ONLY -
  TOLERANCE 0.1 DEGREES
• PRINT MEMBER BETA GROUPED COMMAND -FORMAT

22
General (continued)

• A GLOBAL option has been added to LIST FORCES.
  This option will print member forces in the
  global reference frame, instead of the standard
  local (member) reference frame.
• Syntax
• LIST FORCES (GLOBAL)

23
General (continued)

• Two new options have been added to the
• LIST JOINT FORCES command GLOBAL (WITH TOTAL)
  and MEMBERS m_list.
• The GLOBAL option causes the member and element
  forces to be rotated from the local coordinate
  system to the global coordinate system.

24
General (continued)

• In the case of members with ECCENTRICITIES,
  the forces are transformed from the flexible end
  of the member to the joint - therefore LIST JOINT
  FORCES GLOBAL will not match LIST FORCES even
  after resolving the coordinate systems for
  members with ECCENTRICITIES.

25
General (continued)

• The WITH TOTAL option will print the summation
  of all listed members and elements for each DOF
  for each joint and active load. The GLOBAL option
  always outputs all six global DOF, instead of
  being restricted to member DOF.
• The MEMBERS m_list option restricts the printed
  forces to members or elements in m_list.

26
General (continued)

• Syntax of the modified command

27
General (continued)

• 191 gt LIST JOINT FORCES GLOBAL JOINT 3
• -------------------------------------------------
  --------------------------------------------------
  --------------------------------
• --- Loading - 1
• -------------------------------------------------
  --------------------------------------------------
  --------------------------------
• GLOBAL joint forces output by loading
• MEMBER/ REF
• /-JOINT-/-ELEMENT-/-FRAME-/---------------------F
  ORCES---------------------/---------------------MO
  MENTS-------------------/--ECC-/
• FORCE X
  FORCE Y FORCE Z MOMENT X
  MOMENT Y MOMENT Z
• 3 1 GLOBAL 6.119
  6.148 0.000 0.000
  0.000 11.185 NO
• 3 2 GLOBAL 6.119
  6.148 0.000 0.000
  0.000 -11.185 NO
• 3 3 GLOBAL -6.119
  -6.148 0.000 0.000
  0.000 11.476 NO
• 3 4 GLOBAL -6.119
  -6.148 0.000 0.000
  0.000 -11.476 NO

28
General (continued)

• 193 gt LIST JOINT FORCES GLOBAL WITH TOTAL
  JOINT 3 MEMBERS 1 2
• -------------------------------------------------
  --------------------------------------------------
  --------------------------------
• --- Loading - 1
• -------------------------------------------------
  --------------------------------------------------
  --------------------------------
• GLOBAL joint forces output by loading
• MEMBER/ REF
• /-JOINT-/-ELEMENT-/-FRAME-/---------------------F
  ORCES---------------------/---------------------MO
  MENTS-------------------/--ECC-/
• FORCE X
  FORCE Y FORCE Z MOMENT X
  MOMENT Y MOMENT Z
• 3 1 GLOBAL 6.119
  6.148 0.000 0.000
  0.000 11.185 NO
• 3 2 GLOBAL 6.119
  6.148 0.000 0.000
  0.000 -11.185 NO
• ---------------
  --------------- --------------- ---------------
  --------------- ---------------
• Totals 12.237
  12.295 0.000 0.000
  0.000 0.000

29
General (continued)

• The RENAME command has been added. This command
  allows you to change the name of an existing
  component - joint, member/element, load or group.
• Syntax
• RENAME type old_name new_name
• where type is the type of component to rename.
  The allowable types are
• JOINT (or NODE), MEMBER (or ELEMENT), LOAD,
  GROUP.

30
General (continued)

• The MEMBER PROPERTIES Command has been enhanced
  giving the user the ability to define member
  properties for Channels and Polygonal Tubes by
  specifying their dimensions.
• The following are examples of the two new
  options for the MEMBER PROPERTIES Command

31
General (continued)

• MEMBER PROPERTIES
• 1 TO 10 CHANNEL TOTAL DEPTH 16.97 -
• WEB THICKNESS 0.585 FLANGE WIDTH 10.425 -
• FLANGE THICKNESS 0.985
• 11 TO 20 POLYGONAL TUBE -
• DIAMETER BETWEEN FLATS 14.35 -
• NUMBER OF SIDES 8 -
• THICKNESS 0.985

32
General (continued)

• Members whose properties have been defined
  through these options can be code checked by the
  GTSTRUDL Codes that support such cross-sections.
  Also, these new options are available for
  prismatic and variable members.

33
General (continued)

• The CALCULATE SOIL SPRINGS command has been
  enhanced to
• 1) Allow a single KS value without an element
  list, which indicates that GTSTRUDL should find
  all elements and element faces that lie on the
  specified plane and create an assumed element
  list. This makes adding soil springs to an
  entire slab on one level much simpler.

34
General (continued)

• 2) Added a NO SUPPORT CHECK option to the
  COMPRESSION ONLY nonlinear springs capability.
  NLS elements will be added to the model without
  regard to the current support status of the
  involved joints as opposed to the current
  requirement that soil springs can be added only
  to joints with the appropriate DOF (FX, FY or FZ)
  restrained. This allows you greater flexibility
  in modeling, but leaves the responsibility of
  creating a stable analysis model up to you. An
  informational message is generated if the NO
  SUPPORT CHECK option is used, but the appropriate
  DOF is fixed - which will result in the created
  NLS being nonfunctional

35
General (continued)

• 3) The name of the generated NLS has been added
  to the output if the COMPRESSION ONLY option is
  used. In addition, the informative comments
  output below the spring value report now reflect
  the actual names of the generated NLS so they can
  be copied from the output to be added to your
  input or pasted into the Command window.

36
General (continued)

• A new command will be implemented to make it
  easier for the user to specify the Beta angle for
  members with eccentricities in planes which are
  not parallel to a global plane. The new command
  is
• ACTIVE BETA ANGLE DEFINITION -
• With JOINT TO JOINT OR ECCENTRIC
• option

37
GTMenu

• Member loads on cable elements can now be
  displayed.
• The Inquire dialog no longer disappears when the
  Graphics window is activated.
•  

38
GTMenu (cont)

• Force Diagrams and value labels can now be
  rotated according to the Beta Angles on Members.
• A FY Diagram is plotted in the local xy plane
  by default a FZ Diagram is plotted in the local
  xz plane by default a MY Diagram is plotted in
  the local xz plane by default and a MZ Diagram
  is plotted in the local xy plane by default

39
GTMenu (cont)

• The GENERATE INPUT FILE feature now includes
  NONLINEAR EFFECTS, NONLINEAR SPRING PROPERTIES
  and NONLINEAR SPRING ELEMENT commands. In
  addition, OBJECT commands are included along with
  group titles .
• "TYPE RMS" and "TYPE ABS" Load Combinations are
  now translated and put into the input file.

40
GTMenu (cont)

• Finite elements are now labeled closer to their
  centroid.
• When checking for duplicate joints, the duplicate
  joints, members, or elements are now labeled on
  the screen.
• When checking for floating joints, the floating
  joints are now labeled on the screen.

41
GTMenu (cont)

• Redraw solid will display the nine Unistrut
  sections in the GTSTRUDL Unistrut table as shown
  on the next slides.

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45
GTMenu (cont)

• A new option has been added to allow you to
  create Section Property Groups when you are
  creating new members. The new option to the
  Member Properties dialog is shown

46
GTMenu (cont)

• When Refining a Finite Element Mesh and changing
  to a higher order element, the mapping shown on
  the next slide is now followed which shows the
  lower order element and the new higher order
  element.

47
GTMenu (cont)

• The following eight cases are used in the
  mapping
• (1) a plane stress triangle maps to type 'LST'
• (2) a plane stress quad maps to type 'IPQQ'
• (3) a plate bending triangle produces an error
  saying unavailable
• (4) a plate bending quad maps to type 'IPBQQ'
• (5) a tridimensional 6 node prism maps to type
  'WEDGE15'
• (6) a tridimensional 8 node brick maps to type
  'IPSQ'
• (7) a plate triangle produces an error saying
  unavailable
• (8) a plate quad produces an error saying
  unavailable.

48
GTMenu (cont)

• A graphical interface to the LIST SUM FORCES
  command has been implemented. This works by
  starting with a line or plane of joints that cut
  the structure. (A line cuts a 2-D structure
  whereas a plane is necessary to specify a cut of
  a 3-D structure.) Next, all members and elements
  above or below the cut are marked. Then
  individual members or elements can be deselected.
  Finally the forces are summed for this
  specification, producing textual output.

49
GTMenu (cont)
50
GTMenu (cont)
cut
results
51
GTMenu (cont)

• When refining a finite element grid, there is now
  an option to split any framing members in the
  same way automatically.

52
GTMenu (cont)
After mesh refinement with split members labeled
Before mesh refinement with members labeled
53
GTMenu (cont)

• Mode shapes on finite element meshes may now be
  contoured.

54
Contour of z component of Mode 1
55
GTMenu (cont)

• Additional steel design parameters may now be
  displayed
• LX, FRLX, FRLY, FRLZ, FRUNLCF, TBLNAM, Yield
  Strength, Tensile Strength
• The new dialog is shown on the next slide.

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57
GTMenu (cont)

• Dynamic mass specified using the INERTIA OF
  JOINTS command can now be displayed.
• An example is shown on
• the next slide.

58
Dynamic mass from Inertia of Joints from Load
command
59
GTMenu (cont)

• An automatic mesh algorithm for 2D elements has
  been implemented (GTMesh) to mesh structures
  using only the 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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63
Model with External and Internal Boundary (uses
Constructions Points and Lines
64
Resulting Mesh
65
GTMenu (cont)

• The user is now able to change the colors used
  for contour plots.
• Different colors can be used for members and
  finite elements for the deformed structure, mode
  shapes and transient animation as shown on the
  next slide.

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67
GTMenu (cont)

• GTMenu can now produce selected result graphs for
  a selected member (e.g., for inclusion in a
  report). The results available for selection are
  local y displacement, local z displacement and
  local force and moment diagrams and envelopes.
  The new dialog and an example of the Graph Result
  window are shown on the next slides.

68
GTMenu
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70
GTMenu (cont)

• A right mouse click can now be set so that only
  joints, members or elements are selected. This
  is retained unless you change it from the Inquire
  button. The right mouse click setting is now
  displayed at the top of the Graphics Display as
  shown on the next slide.

71
GTMenu (cont)
72
GTMenu (cont)

• A new rectangular fencing selection mode has been
  implemented on the Mode Bar. There are two
  options available with the Rect. Fence as shown
  below

73
GTMenu (cont)

• Finite element edges and faces may now be labeled
  as shown on the revised Display Model dialog on
  the next slide.

74
GTMenu (cont)
New options on Display Model dialog to label
finite element edges and faces
Example of Edge Labeling
75
Nonlinear

• A new optional parameter, NGP iNGP, has been
  added to the NONLINEAR EFFECTS, PLASTIC SEGMENT
  option that provides for the specification of
  either two or three Gauss quadrature points for
  the numerical integration of the plastic segment
  equilibrium equations. The specification of NGP
  3 provides for improved plastic segment accuracy
  over a greater range of segment lengths when
  compared to that associated with NGP 2, the
  default value that was originally implemented as
  a fixed constant.

76
Nonlinear (cont)

• Example
• NONLINEAR EFFECTS
• PLASTIC SEGMENT NGP 3 END -
• FIBER GEOMETRY NTF 2 NTW 1 NBF 14 ND 12
• LH 10.0 -
• STEEL FY 50.0 FSU 50.00001 ESU 1.0 MEMBER -'COL4'
  'COL8'

77
Nonlinear (cont)

• In previous versions, member loads could not be
  applied to members for which the PLASTIC SEGMENT
  nonlinear effect was specified. This restriction
  has been removed and all member load types are
  now supported for the PLASTIC SEGMENT nonlinear
  effect.

78
Offshore

• The GTSelos Stream Function Wave model has been
  updated with the addition of the Fenton nonlinear
  wave option. Two stream function wave models are
  now available, the Dean model and the Fenton
  model.

79
Offshore (cont)

• The offshore steel design code APIWSD21, which is
  based on the API Recommended Practice 2A-WSD (RP
  2A-WSD) Twenty-First Edition steel design code
  for Basic Stresses, Hydrostatic Pressure, and
  Punching Shear, has been moved to release status.
  The documentation for the APIWSD21 code may be
  found by selection the Help menu and then
  Reference Documentation, Reference Manuals,
  Offshore Loading, Analysis, and Design, and then
  APIWSD21 API RP 2A-WSD, 21st Edition in the
  GTSTRUDL Output Window.

80
Offshore (cont)

• APIWSD21 punching shear check now can perform a
  code check for joints with thickened cans.
  Joints with thickened cans are discussed in the
  Section 4.3.5 of the API WSD 21st Edition. There
  are four new parameters applicable to the joints
  with thickened cans option.

81
Offshore (cont)

• A new International Standard ISO 199022007(E),
  First Edition, 2007-12-01, Petroleum and natural
  gas industries Fixed steel offshore structures
  has been implemented as a prerelease feature.
  The GTSTRUDL code name for this new offshore code
  is 19902-07. The 19902-07 code performs Basic
  stresses, Hydrostatic Pressure, and Punching
  Shear stresses check according to International
  Standard ISO 199022007(E). This new code,
  19902-07, may be used to select or check Circular
  Hollow Sections (Pipes).

82
Static Analysis

• Modest efficiency and performance enhancements
  have been made to the GTSES static analysis
  sparse solver and the GTSELANCZOS sparse equation
  Lanczos eigenvalue solver, both 32-bit solvers.
  Execution speeds may increase by as much as 30
  and the solvers are more robust, better able to
  complete satisfactory solutions for less
  well-conditioned models.

83
Steel Design

• Efficiency improvements have been made to both
  the member selection and code checking functions
  when the external file solver is active and
  analysis results are stored in files on external
  storage devices. In particular, virtual memory
  demands have been reduced, enabling the CHECK
  and SELECT commands to handle the required
  numbers of members and loading conditions more
  efficiently.

84
Steel Design (cont)

• The Eurocode 3, EN 1993-1-1 2005 (E) steel
  design code has been moved to release status.
  This new code, EC3-2005, may be used to select or
  check any of the following shapes

85
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

86
Steel Design (cont)

• Efficiency improvements have been added to the
  EC3-2005 code since it was implemented as a
  prerelease feature. The time to code check
  (CHECK) or design (SELECT) for jobs with large
  number of loadings have been reduced.

87
Steel Design (cont)

• Under previous versions of GTSTRUDL, the message
  below indicates that nonlinear analysis is
  required for code checking based on LRFD codes
• WARNING_STTECC -- Code check based on the
  LRFD code requires nonlinear analysis. Nonlinear
  analysis has not been performed for the following
  loadings
• According to the AISC 13th Edition Code,
  nonlinear analysis is required regardless of the
  method (LRFD or ASD) used. For GTSTRUDL Version
  32, the message above has been modified to
  reflect this AISC 13th Edition requirement
• WARNING_STTECC -- Code check based on the
  AISC13 code requires nonlinear analysis.
  Nonlinear analysis has not been performed for the
  following loadings

88
Steel Design (cont)

• When a value of YES has been specified for the
  parameter TowerCK, the slenderness ratios are
  checked according to the transmission tower code
  provisions. This option is applicable to the
  AISC13 and ASD9 codes for single and double angle
  cross-sections and was a new option that was
  added to Version 31.
• In Version 32, this option has been modified
  so that the AISC13 or ASD9 slenderness ratios
  L/r, KL/r, B7 TEN, and B7 COMP are checked as
  informative provisions rather than pass/fail
  conditions. This means that as of Version 32,
  only the transmission tower slenderness ratios
  SLENT and SLENC are checked as pass/fail
  provisions. Previously, all slenderness ratios
  L/r, KL/r, B7 TEN, B7 COMP, SLENT, and SLENC
  (transmission tower, AISC13, and ASD9) were
  checked as pass/fail provisions.

89
Steel Design (cont)

• Additional error checking for parameters CODE,
  TBLNAM, and STEELGRD has been added into the
  steel design parameter command. The user
  specified parameter values for the parameters
  CODE, TBLNAM, and STEELGRD are now checked
  against accepted values and if the specified
  value is incorrect, an error message is given and
  the scan mode is set.

90
Steel Tables and GTTABLE

• The output of the Table print commands will no
  longer overflow the output field and be printed
  as when the value is larger than
  the reserved field. The values that are too
  large for the reserved fields are automatically
  converted to an exponential format before being
  printed.

91
Base Plate

• Commands for anchor checking by ACI 318-05
  Appendix D have been implemented. The commands
  are shown on the next slides and will be further
  discussed in a later presentation.

92
Base Plate (cont)
93
Base Plate Wizard

• Two new anchor patterns
• Circle/arc Add anchors in a circular arc up to
  a full circle
• Grid - like the current 4 corners edges
  option, but fills in the interior anchor
  positions also, not just the perimeter.

94
Base Plate Wizard (cont)

• Selective weld lines
• Currently all lines in an attachment are
  considered as welded to the base plate. A new
  feature will be added to designate specified
  lines as not welded. These unwelded lines will
  be modeled as having a compression-only
  connection to the base plate, either with
  compression-only dummy members or stiff,
  compression-only NLS elements.
•  

95
Base Plate Wizard (cont)

• New custom attachment dialog
• A new dialog will allow you to modify a standard
  attachment from the attachment file or create a
  new attachment. Included will be an ability to
  indicate which lines are welded to the base
  plate.

96
Future Enhancements
97
Base Plate

• X or Y rotation for attachments to model
  attachments not parallel to Z, such as angled
  brace legs for pipe supports. 
• Arbitrary load points (X,Y,Z) for attachments. 
• Decimal place control in results output. 
• Optional LIST SUM FORCES results for Constraints
  to allow easy cut line calculations.

98
Base Plate (cont)

• Improved Loading dialog. 
• Batch processing of .gtbp files. 
• Optional output of load names causing the largest
  interaction value for anchors in Results
  Summary. 
• Add X, Y coordinates to stress results dialog.

99
Dynamic Analysis

• Implement GTSES/GT64M versions of linear direct
  integration (physical) transient analysis.
• Computation of minimum seismic load according to
  latest IBC provisions.
• Implement the Lindley-Yow response spectrum
  rigid-periodic mode combination method as a
  companion to the presently available Gupta method.

100
Dynamic Analysis (cont)

• Response spectrum analysis will keep a record of
  eigenvalue analysis results on a load-by-load
  basis. This will be particularly useful when the
  results of different eigenvalue analyses are used
  for different response spectrum load analyses in
  the same job, and mode combinations such as CQC,
  which is a function of damping ratio and
  frequency, are used.

101
Finite Elements

• 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.

102
General

• 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.

103
General (cont)

• 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.

104
General (cont)

• 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.
• A new option will be added to the PRINT MEMBER
  PROPERTIES command to print all cross-sectional
  property information.

105
General (cont)

• A general-purpose zero-length, linear spring
  element is planned for implementation by the
  specification of a symmetric stiffness matrix in
  terms of Kaa, Kba, and Kbb, similar to the method
  used to specify superelement stiffness matrices.

106
General (cont)

• 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 doesnt need to be
  inactivated.
• PLOT option - create a Scope Editor file like
  the dialog display with shaded bounded areas.

107
General (cont)

• Develop 64 bit version of GTSTRUDL.

108
GTMenu

• Add Undo to remove duplicate joints dialog to
  avoid corrupting model due to using a tolerance
  which was too large.
• Improve efficiency when displaying large models.
• Graphically specify Area Loads in GTMenu.

109
GTMenu (cont)

• Addition of the following items to the input file
  created by GTMenu
• Dynamic Loadings
• Eigen Parameters
• Dynamic Modal Damping Data
• Nonlinear Solution Parameters
• Cable Network Data
• Nonlinear and Dynamic Analysis solution commands

110
GTMenu (cont)

• Add a general fencing option to allow the user to
  specify a non-rectangular fence.
• Add the ability to apply filters to the model to
  display only entities corresponding to the active
  filter.
• Automatically create Views such as for every
  floor and every vertical plane of building.
  Also, develop command that will do this.

111
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.

112
Nonlinear Analysis

• 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

113
Nonlinear Analysis (cont)

• Efficiency improvements are planned for the GTSES
  sparse equation solver used by nonlinear static
  analysis, similar to those implemented in Version
  32 for the GTSES linear static analysis solver.
• A GT64M sparse equation solver is planned for
  nonlinear static analysis.

114
Nonlinear Analysis (cont)

• Higher order improvements are planned for the
  nonlinear geometric versions of the plane and
  space frame member.
• The implementation of a nonlinear geometry model
  is planned for at least one solid finite element,
  probably the IPSL element.

115
Offshore

• Implement fatigue analysis based on transient
  analysis results.

116
Offshore (cont)

• The efficiency of the fatigue load analysis
  procedures will be enhanced by the addition of an
  option that provides for the selection of the
  GTSES sparse equation solver for linear static
  analysis.
• A new GTSELOS feature is planned whereby
  additional tables express the drag parameters CD
  and CM as function(s) of one or more of the
  existing pipe member diameter, water depth,
  Reynolds number parameters, plus the additional
  parameters roughness and Keulegan-Carpenters
  Number.

117
Offshore (cont)

• GTStrudl fatigue analysis is presently restricted
  to the use of a single S-N curve that applies to
  all members undergoing a given fatigue analysis.
  An improvement to this procedure is planned
  whereby multiple S-N curves can be defined as
  functions of pipe member wall thickness, a
  reference thickness, a thickness exponent, and a
  stress range and assigned individually to
  members for the fatigue analysis.

118
Offshore (cont)

• An Influence Matrix approach to perform hotspot
  fatigue analysis of connection details other than
  simple tubular joints is planned.
• An additional fatigue analysis results reporting
  function is planned that provides for the
  tabulation of the most severe fatigue damage as a
  function of wave height and wave period in
  addition the present report given as a function
  of wave direction.
• A new fatigue analysis report that states the
  center of damage for each of the three sea state
  parameters wave height, wave period, and wave
  direction is planned.

119
Reinforced Concrete

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

120
Steel Design

• 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.

121
Steel Design

• 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.

122
Steel Design (cont)

• Steel design based on the AISC 14th Edition for
  all rolled cross-sections.
• Steel design based on the Seismic provisions of
  the AISC 14th Edition.
• Add a new option into the SELECT command to
  design the FAILED members.
• SELECT ALL FAILED MEMBERS

123
Steel Design (cont)

• Modify the FOR MAXIMUM ENVELOPE VALUES option of
  the SELECT and CHECK command when the
  cross-section is an unsymmetrical cross-section.

124
Steel Design (cont)

• Add a FOR MAXIMUM DIAGRAM VALUES option to the
  SELECT and CHECK command. This option creates a
  single maximum force values for each individual
  load case. When this option is used, each
  artificial load case will have a single force
  values which has the maximum values of individual
  forces and moments no matter where the maximum is
  located along the members length.

125
Steel Tables

• Implement AISC 14th edition tables.

126
Interfaces to Other Programs

• AutoCAD interface via DXF converter
• Intergraphs Frameworks
• Intergraphs SmartPlant 3D CIS/2
• Structural Desktop by Structural Desktop, Inc
• Tekla Structures
• ATLAS by 3DR Engineering Ltd. in Europe
• Other CAD programs which support DXF or CIS/2

127
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.