GTSTRUDL Version 28 and Beyond

1
GTSTRUDL Version 28 and Beyond

• Kenneth M.(Mac) Will
• CASE Center
• GTSUG 2005
• June 2005

2
Presentation Outline

• Version 28 status
• Additional features added to Version 28 since
  last Junes presentation
• Enhancements planned for Version 29
• Future enhancements
• Demonstration of some of the new features

3
Version 28 Release Status

• QA complete
• Documentation complete including electronic pdf
  documents
• Release Guides Volumes 1 2
• Installation Guide
• Getting Started
• Analysis Guide
• Design Guide
• Revision R of Reference Manuals (Volumes 1,
  2A,2B,3,4,5,7,8 and Abstract of Commands)
• CDs are being duplicated
• Student Version of 28 (Student Edition 9.0) will
  be available in September

4
Additional Features in Version 28

• Several additional features have been added to
  Version 28 which were not included in the 2004
  presentation. These additional features are
  briefly described on the next slides.

5
Additional Features in Version 28

• New feature added to File pulldown to Create a
  New Text Input File. This allows you to create
  a text input file as you would from GTMenu
  without requiring you to enter GTMenu.

6
Additional Features in Version 28

• The Modeling pulldown has been restructured and
  new features have been added under the Loads and
  Create Joint Constraints options.

7
Additional Features in Version 28

• A new option is available under Loads to create
  Area loads. The next few slides illustrate the
  new Area load dialogs.

8
Additional Features in Version 28
9
Additional Features in Version 28
10
Additional Features in Version 28
11
Additional Features in Version 28

• New Joint Constraints dialog

12
Additional Features in Version 28

• The Results pulldown has been modified. A
  Datasheets option has been added. Also, new
  features have been added to the Static Results
  pulldown.

13
Additional Features in Version 28

• New List Sum Forces dialog

14
Additional Features in Version 28

• A new option has been added to the Section Forces
  dialog to include the output of corresponding
  forces. For example, for the section location
  and loading that causes the maximum value of MZ,
  the associated values of other force and moment
  components will also be output.

15
Additional Features in Version 28

• The results datasheets have been further enhanced
  to allow the ability to write a tab delimited
  file. This file may then be opened in Excel. An
  example of the new Member End Force datasheet is
  shown on the next slide. Then, the following
  slide shows the new File pulldown and the Print
  and Write ltTabgt file dialogs.

16
Additional Features in Version 28
17
Additional Features in Version 28
18
Additional Features in Version 28

• The List and Compute dialogs under Dynamic
  Analysis results have also been modified.
  Separate buttons for the selection of Members and
  Elements now appear at the bottom of the dialogs.

19
Additional Features in Version 28

• A new option has been added to the Create Cross
  Section Property Database dialog to allow the
  display of results generated during the creation
  of the Property Database (profile table). This
  new option is shown on the next slide.

20
Additional Features in Version 28
21
Additional Features in Version 28

• A new feature has been added to the GTSTRUDL
  Output Window. Right clicking the mouse in the
  GTSTRUDL Output Window will bring up the
  following pop-up

22
Additional Features in Version 28

• A new Display Options button has been added to
  the Element Contours dialog in GTMenu. The
  Contour Display Options dialog is shown on the
  next slide. Then, an additional slide
  illustrates the use of this option to display
  contours only in a range of stress.

23
Additional Features in Version 28

• New Contour Display Options dialog. Example
  illustrating setting the minimum stress to
  display inside the limit to 5.0.

24
Additional Features in Version 28
Contour stresses inside range (gt 5 )
25
Additional Features in Version 28

• A number of changes have been implemented in the
  Input File created in GTMenu
• The Material Command is now used for standard
  properties.
• Excessive comment lines () have been removed.
• Joint Coordinates and Member Incidences now
  generate only one blank initial spacing line.

26
Additional Features in Version 28

• Adjacent joints with the same spring values are
  now grouped together under Joint Releases.
• Element Incidences are now written with the
  element name and up to 8 incidences on a single
  line.
• A Beta Angle of 0.0 is no longer listed.

27
Additional Features in Version 28

• If you End GTMenu while in a view other than
  Views 1 to 4, a new dialog will appear as show
  below. Also, shown is the dialog from Version 27
  which is replaced by the new dialog

Version 27
Version 28
28
Additional Features in Version 28

• Additional enhancements in GTMenu
• The contour legend is redrawn when a contour is
  refreshed.
• The prompt asking if you would like to update the
  View database has been removed.
• A larger dot is drawn for the grid points when
  using Create Members or Elements Using a Grid.

29
Additional Features in Version 28

• Additional enhancements in GTMenu (cont)
• The material, Prismatic, and Pipe Property Group
  dialogs now have an option to bring up a
  calculator. Also, the Property Group dialogs
  will now display the longnames.
• A larger X is now used to indicate if a joint has
  been selected.

30
Additional Features in Version 28

• New features added to Dynamics
• Assembly of the mass matrix for dynamic analysis
  no longer forces the mass matrix to be consistent
  mass when joint constraints are present.
• The Compute Composite Damping Ratios command has
  been extended whereby the composite modal damping
  ratios can now be computed assuming that the
  damping is proportional to stiffness and mass.
• Efficiency improvements have also been made for
  the assembly of dynamic mass and composite modal
  damping matrices for models which contained rigid
  bodies and damping ratios for joint inertias.

31
Additional Features in Version 28

• New features added to Finite Elements
• The element name in the Element Properties
  command is no longer required to be in upper case
  or to have single quotes around the name.
• The temperature gradient loading capabilities on
  the BPHT, BPHQ, SBHQ, SBHQCSH, SBHT6, and SBHQ6
  elements has been brought to a release status.

32
Additional Features in Version 28

• New General features added
• New commands have been added to delete joints,
  elements or members that do not have any data
  associated with them
• Delete Joints Without Coordinates
• Delete Members Without Incidences
• Delete Elements Without Incidences
• The Summary option for List Section Forces has a
  new option to include the output of Corresponding
  Forces
• List Section Forces Summary and Corresponding
  Forces
• An example is shown on the next slide.

33
Additional Features in Version 28

• LIST SECTION FORCES SUMMARY AND CORRESPONDING
  FORCES MEMBER 27
• The following is the output produced by the above
  command
• -------------------------------------------------
  ----------------------------------------------
• Max/min Section Forces for member 27 ,
  locations are fractional.
• Value Load Location
  Value Load Location
• ------------- -------- --------
  ------------- -------- --------
• Max FX -0.5 4 1.0000
  Min FX -2. 2 1.0000
• Max FY 10. 2 1.0000
  Min FY -0.1E02 2 0.0000
• Max FZ 0.0E00 4 1.0000
  Min FZ 0.0E00 4 1.0000
• Max MX 0.0E00 4 1.0000
  Min MX 0.0E00 4 1.0000
• Max MY 0.0E00 4 1.0000
  Min MY 0.0E00 4 1.0000
• Max MZ 3. 4 0.0000
  Min MZ -0.2E02 2 0.0000
• Corresponding Forces for FX FY FZ MX MY MZ
• Max FX -0.5040967 0.6305282
  0.0000000E00 0.0000000E00
  0.0000000E00 -3.548704
• Min FX -2.147321 9.721370
  0.0000000E00 0.0000000E00
  0.0000000E00 -12.43836
• Max FY -2.147321 9.721370
  0.0000000E00 0.0000000E00
  0.0000000E00 -12.43836
• Min FY -2.147321 -10.27863
  0.0000000E00 0.0000000E00
  0.0000000E00 -15.22468

34
Additional Features in Version 28

• New enhancements to Offshore
• Dramatic efficiency improvements have been made
  to the processing of wave load data for fatigue
  analysis.
• Offshore punching shear output has been modified
  to print the largest stress actual/allowable
  ratio and also the largest geometry check
  actual/allowable ratio.
• Two new options have been added to the punching
  shear code check command to print a summary of
  the punching shear code check results and the
  largest actual/allowable ratios.

35
Additional Features in Version 28

• New Steel Design Enhancements
• A special Ninth Edition AISC allowable stress
  design code called ASD9-E has been implemented
  for W shapes. The equations have been modified
  to include E. This is useful for structures
  where E and possible other material data must be
  modified to account for high temperature.
• The List Code Check Results command has been
  modified to display the members which failed
  member constraints checks.

36
Additional Features in Version 28

• New Steel Design Enhancements (cont)
• Automatic K-factor computation output has been
  enhanced to display the support status at the end
  of a column.
• CW computation in the NF83 code has been modified
  to check the table database to see if CW exists
  and to use the database value if it exists.
• Commands with Joint, Member, and Load List
  options are now checked for non-existent joints,
  members, or loads. An error message is output if
  a user specifies non-existent data in a list.

37
New Features for Version 29
38
GTSTRUDL Model Wizard

• New Model Wizards for
• Braced Frames
• Circular Plates
• Rectangular Tanks

39
Model Wizard (cont)
40
Braced Frame Model Wizard

• X and Chevron Bracing
• User may select the bays to be braced
• User may select releases on beams and braces

41
Braced Frame Model Wizard (cont)
42
Braced Frame Model Wizard (cont)
43
Circular Plate Model Wizard

• Generates a finite element plate model using
  SBHQ6 and SBHT6 elements
• User may control the number of divisions in the
  radial and circumferential directions
• Plate may have hole at the center
• Supports at edges or soil springs under plate
  with an option for compression only springs
• Self weight and pressure loadings

44
Circular Plate Model Wizard (cont)
45
Circular Plate Model Wizard (cont)

• Support options

46
Circular Plate Model Wizard (cont)

• Load options

47
Rectangular Tank Model Wizard

• Generates a finite element plate model using
  SBHQ6 and SBHT6 elements
• User may control the number of spaces in the X,
  Y, and Z directions for the finite element mesh
• Pinned or fixed supports on all bottom joints or
  elastic soil springs on all bottom joints
• Self weight, internal pressure and hydrostatic
  loadings

48
Rectangular Tank Model Wizard (cont)
49
Rectangular Tank Model Wizard (cont)

• Support options

50
Rectangular Tank Model Wizard (cont)

• Loading options

51
Additional Model Wizard Enhancement

• The Plane Frame and Braced Frame Model Wizards
  allow you to specify the vertical direction to
  facilitate using the Model Wizard multiple times
  for the same model with frames in different planes

52
GTMenu

• New cylindrical coordinate systems (cylindrical
  system with the X, Y or Z axis as the axis of the
  cylinder)

53
GTMenu (cont)

• Member Releases are now output using a rotated
  font instead of being drawn as shown on the next
  slide
• This permits selecting and editing the text in
  the Scope Editor

54
Example showing GTMenu Member Releases in Version
29
55
The Same Example Showing GTMenu Member Releases
in Version 28
Note the drawn symbols for releases
56
GTMenu (cont)

• Ability to Move all or part of the model
• Move based on distance between two joints or
• Move based on incrementing coordinates in current
  coordinate system (Cartesian, Cylindrical, or
  Spherical)

57
GTMenu Move Model (cont)
58
GTMenu (cont)

• New Mirror option on Copy Model Dialog
• Mirror about XY, XZ, or YZ planes
• Planes can be identified as passing through a
  coordinate value or by selecting a joint
• Option to maintain incidence order

59
GTMenu Mirror Option on Copy Model Dialog (cont)
60
Mirror Example using FE mesh
Mirror about YZ plane through this joint
61
Mirror Example using FE mesh -After mirroring
62
Mirror Example using FE mesh -After mirroring
with incidence order maintained
63
GTMenu (cont)

• New Extrude Model option available under Edit
  pulldown

New Extrude option
64
Extrude Model Dialog

• Extrude frame model with members connecting each
  extrusion repetition
• Extrude selected 2D members to 2D finite elements
• Extrude all 2D finite elements to 3D solid finite
  elements

65
Extrude Model Spacing Dialog

• Uniform or variable spacing
• Add downward columns columns below a floor level

66
Extrude Selected Joints Dialog
67
Resulting Model from Extruding Selected Joints
68
Extrude 2D Finite Elements to 3D Solid Finite
Elements Starting 2D model
69
Extruded 3D Solid Model
70
Other GTMenu enhancements

• Add the ability to automatically label the
  maximum and minimum values on force diagrams and
  envelopes. To accomplish this, a new check box
  is added to the Member Forces dialog as shown on
  the next slide. An example is also shown on a
  subsequent slide.

71
Label Max and Min Values on Diagrams and Envelopes

• New dialog with option to label maximum and
  minimum values

72
Example Showing Labeling of Maximum and Minimum
Values and Locations on Moment Diagram
73
Other GTMenu enhancements

• CQSHELL6 plate element
• Models can be created using this new element in
  GTMenu
• Element Loads can be applied in GTMenu
• Stress results can be contoured
• Highlight an entire element when it is selected
• Left click an item (joint, member, or element) a
  second time to deselect it
• Add Punching Shear code check result to GTMenu

74
Other GTMenu enhancements

• Add a Display Options capability to the Principal
  Vector display for principal stress vectors
  similar to the one shown here for contouring

75
Other GTMenu enhancements

• Global Plane menu allows hitting a joint.
  Previously, the user had to specify a coordinate
  value.

76
Other GTMenu enhancements

• Addition of the following items to the input file
  created by GTMenu
• Joint Ties, Rigid Bodies, and Slave Releases
• Dynamic Loadings
• Eigenparameters
• Dynamic Modal Damping Data
• Nonlinear Effects
• Nonlinear Spring Properties
• Nonlinear Solution Parameters
• Cable Network Data

77
Linear Buckling Analysis

• Implement space truss members for linear buckling
  analysis
• Implement space frame members with member
  releases for linear buckling analysis

78
Dynamic Analysis

• A new version of the out-of-core GTLANCZOS
  eigenvalue analysis solver called GTHCLANCZOS has
  been implemented and is currently undergoing
  testing. GTHCLANCZOS does less to improve
  efficiency than it does to significantly increase
  the size of the eigenvalue problem that can be
  solved. To date, we have successfully solved
  eigenvalue problems having 240,000 DOFs as shown
  on the next slide.

79
Dynamics (cont)

• Bandwidth 1179
• Joints 39765
• Members and Elements 46587
• Number of Modes 100
• Solution data for GTHC-LANCZOS Solver
• Number of dynamic degrees-of-freedom 236640
• Number of modes requested 100
• Eigenvalue tolerance
  1.00000E-06
• Number of terms in skyline
  1,111,926,227 (over 8 Gigabytes of data)
• Average column height of skyline 4699
• Number of hypercolumns 112
• Rank of mass matrix 236640
• Number of Lanczos vectors computed 187

80
Dynamic Analysis (cont)

• Efficiency improvements are being implemented for
  response spectrum analysis, transient analysis,
  and harmonic analysis when the USE EXTERNAL FILE
  SOLVER command is used.
• These improvements include the ability to
  store and retrieve results data limited only by
  the amount of hard drive space available. In
  addition, improvements are also being made to the
  efficiency of the maximum value file search
  algorithm used for the LIST TRANSIENT MAXIMUM and
  CREATE PSEUDO STATIC LOAD FROM MAXIMUM commands.

81
Dynamics (cont)

• Sample output from a 100-mode RS analysis of that
  large model using the GTHCLANCZOS out-of-core
  eigenvalue solver is shown on the next slide. 
  The response spectrum analysis reflects the
  efficiency improvements to the external file
  solver.  The total virtual memory requirement was
  1.5 Gbytes and the total length of the
  displacement and force results files are 3.6
  Gbytes.

82
Dynamics (cont)

• 15 gt RESPONSE SPECTRUM LOAD 1
• 16 gt SUPPORT ACCELERATIONS
• 17 gt TRANSL X 1.0 FILE 'S.7GD51'
• 18 gt END
• 19 gt RESPONSE SPECTRUM LOAD 2
• 20 gt SUPPORT ACCELERATIONS
• 21 gt TRANSL Y 1.0 FILE 'S.7GD51'
• 22 gt END
• 23 gt RESPONSE SPECTRUM LOAD 3
• 24 gt SUPPORT ACCELERATIONS
• 25 gt TRANSL Z 1.0 FILE 'S.7GD51'
• 26 gt END
• 27 gt
• 28 gt DAMPING RATIOS 0.05 100
• 29 gt
• 30 gt DYNAMIC PARAMTERS
• 31 gt USE EXTERNAL FILE SOLVER
• 32 gt END
• 33 gt

83
Dynamic Analysis (cont)

• Response Spectra widening capablility
• Multi-support acceleration time history
• Change output format for Response Spectrum File
  Data one column
• The List Response Spectrum Base and Story Shear
  capability will be brought to release status
• The Form Static, Form UBC97 Static, and Form
  IS1893 Static Load commands will be brought to
  release status.

84
Finite Elements

• Implement new eight node six degree of freedom
  curved shell element for thin and moderately
  thick shells CQSHELL6
• 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)

85
Nonlinear Analysis

• Incremental nonlinear analysis to facilitate the
  use of nonlinear analysis to solve construction
  sequence problems
• Add models for multi circular spirals in
  rectangular columns for pushover analysis
• Add options for users to type in rebar
  coordinates or automatic equal spacing for
  pushover analysis

86
Nonlinear Dynamic Analysis

• Nonlinear Dynamic Analysis will be brought to
  release status.
• The nonlinear hysteretic spring element, NLS4PH,
  will be brought to release status.
• The viscous damper element for linear and
  nonlinear dynamics will be brought to release
  status

87
Offshore

• The efficiency of the PSD and DISCRETE fatigue
  analysis algorithm has been improved
  significantly by the implementation of a
  joint-by-joint analysis algorithm. A PSD fatigue
  analysis for 200 joints and 700 wave loads that
  once took days only to discover that 2 Gb of
  memory was insufficient to solve the problem can
  now be solved in approximately 15 minutes on a
  3.0 GHz computer having 2 Gb RAM.

88
Reinforced Concrete / Finite Element Analysis of
Slabs

• New command to check or design the reinforcement
  in a finite element model of a slab subjected to
  bending using ACI 318-02.
• User defines the section (cut ) in the slab by
  specifying two joints and an element in the plane
  of the cut
• User can specify the steel and/or spacing
• The new command and sample output are shown on
  the next few slides

89
Reinforced Concrete / Finite Element Analysis of
Slabs (cont)
90
Reinforced Concrete / Finite Element Analysis of
Slabs (cont)

• 188 gt design slab joints 6 50 element 5
• FLAT PLATE SLAB DESIGN
• DESIGN ENVELOPE
• POSITIVE MOMENT 1036799.95 lb-in
• NEGATIVE MOMENT -691200.02 lb-in
• SLAB CROSS-SECTION
• Width (in) Depth (in) FCP
  (psi) FY (psi) Cover (in)
• _____________________________________________
  ________________________________________________
• 96.00 6.00 4000.00
  60000.00 0.75

91
Reinforced Concrete / Finite Element Analysis of
Slabs (cont)

• 190 gt design slab joints 6 50 element 5 top
  face bar 7
• FLAT PLATE SLAB DESIGN
• DESIGN ENVELOPE
• POSITIVE MOMENT 1036799.95 lb-in
• NEGATIVE MOMENT -691200.02 lb-in
• SLAB CROSS-SECTION
• Width (in) Depth (in) FCP
  (psi) FY (psi) Cover (in)
• _____________________________________________
  ________________________________________________
• 96.00 6.00 4000.00
  60000.00 0.75

92
Steel Design

• Torsion and Warping check or design for ASD9 and
  LRFD3 codes.
• Cross-sections considered for ASD9 code are
• I shapes, Channels, Single Angles, and Structural
  Tubes
• Cross-sections considered for LRFD3 code are
• I shapes, Channels, Single Angles, Pipes, and
  Structural Tubes
• Warping stress computations are based on Cases 1
  and 2 of the Torsion Analysis of Rolled Steel
  Section by Bethlehem Steel or the AISC Torsional
  Analysis of Structural Steel Members, Steel
  Design Guide Series 9. The following boundary
  conditions will be implemented
• FIX-FIX, FIX-PIN, PIN-FIX, PIN-PIN

93
Steel Design (cont)

• Modify the FORM load command to automatically
  update itself during analysis when self weight
  exists in the FORM load command. This is similar
  to Load Combination implementation.
• Add Solid Round, Rectangular, and Square Bars to
  LRFD3 code

94
Steel Design (cont)

• Add maximum moments and/or forces to the user
  specified sections for code check or design.
  User can specify from the maximum of FX, FY, FZ,
  MX, MY, MZ, or all of them. When user specifies
  maximum force or moment, the maximum locations
  are added to the list of sections that the user
  has already specified.

95
Steel Design (cont)

• Add an option to code check and design for a
  maximum envelope. This means first finding the
  maximum FX, FY, FZ, MX, MY, and MZ. These
  maximums are then assumed to act at a single
  location for the code check or design.

96
Steel Design (cont)

• Implement new Displacement Constraint Design
  Procedure to select members to satisfy joint
  displacement constraints. An example of some of
  the new parameters, commands and resulting output
  are shown on the next slides.

97
Steel Design (cont)
98
Steel Design (cont)
99
Steel Design (cont)
100
Steel Design (cont)
101
Scope Editor

• Automatic insertion of items from a template
• Date
• File name
• Title with a prompt for user input
• True paragraph data as opposed to current
  acceptance of multi-line input
• Library of symbols to use for copy and paste

102
Scope Editor (cont)

• Increased resolution
• Multi-page document
• Allow margin specification on import from GTMenu
• Implement Undo function

103
Antenna Tower Program

• Simplified modeling of tower and monopole
  geometry
• Simplified appurtenance input
• Automatic ice and wind load calculations
• Nonlinear analysis for guyed towers and monopoles

104
Antenna Tower Program (cont)

• Concise result reporting including twist, sway
  and displacement for antennas
• Code check by ASD9 along with TIA/EFA-222-F
  adjustments
• Investigating code check based on 222-G
• We need your input on this!

105
Antenna Tower Program (cont)

• - Tabbed spreadsheet-like input
• Graphical display of current model
• Menu selections for
• File input
• GTSTRUDL processing
• Results review

106
Antenna Tower Program (cont)

• Modeling
• Tower type Monopole, 3- or 4-sided
• Tower height
• Base and top widths
• Additional inflection (slope change) points

107
Antenna Tower Program (cont)
State and county drop-downs for wind speed
108
Antenna Tower Program (cont)

• Results
• Base reactions
• Displacement of tower joints
• Twist, sway and displacement of antennas
• Member end forces
• Code check results
• Printed reports

109
Future Enhancements

• Graphically specify Area Loads in GTMenu
• Allow a 2-point line to be specified using "Start
  and End" mode, as for Member generation.
  Currently "End to End" mode is assumed.
• Expand the Member and Element generation Spacing
  option, "Defined by Line/Curve", to accept an
  n-point line of up to 500 segments. Currently it
  is limited to 50 segments

110
Future Enhancements (cont)

• Multiple windows to allow for result display in a
  separate window than the model display
• Graphically specify joints and elements to be
  used with CALCULATE RESULTANT
• List the contents of a Group in an Inquire box.
  Currently the contents can only be displayed
  graphically

111
Future Enhancements (cont)

• Add the option to Split Members to interpolate
  eccentricities between the start and end of the
  split members
• 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

112
Future Enhancements (cont)

• ACI 318-2002
• AISC LRFD 4th edition depending on release date

113
Future Enhancements (cont)

• Continue expanding the model data and results
  which are available in Datasheets. Use the new
  datasheets which allow printing and facilitate
  exporting to Excel.

114
Future Enhancements (cont)

• IBC 2000 equivalent static earthquake load
• Hysteretic behavior for plastic hinges and
  nonlinear member end connections
• Custom cross-section fiber geometry specification
  for plastic hinges using basic circles, rings,
  and rectangle areas
• Graphically display plastic hinge status and
  other pushover information

115
Future Enhancements (cont)

• Generalizing nonlinear frame member model to
  support large finite rotation behavior
• Center of stiffness computation in dynamic
  analysis

116
Your assistance is needed to help us improve
GTSTRUDL while you are here

• 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.