GTSTRUDL Version 28 and Future Enhancements

1
GTSTRUDL Version 28 andFuture Enhancements

• Kenneth M.(Mac) Will
• CASE Center
• GTSUG 2004
• June 2004

2
Presentation Outline

• Versions 27.1 and 27.2
• New features in Version 28
• Longer term future enhancements

3
Version 28 Release Status

• Documentation being prepared
• Release Guides Volumes 1 2
• Installation Guide
• Getting Started
• Analysis Guide
• Design Guide
• Revision R of Reference Manuals
• Release is scheduled for September

4
Versions 27.1 and 27.2

• Error correction releases for non-QA customers
  who encountered problems
• If you would like to request 27.2, please let us
  know. This is not a full release only a
  replacement for the gtst27.exe. A new password
  is required.

5
Version 27.2

• Corrections and Enhancements for Version 27.2 of
  GTSTRUDL
• GTMenu
• The number of member property groups that can be
  used by Redraw Solid has been increased from 1000
  to 10000. Models such as those for offshore
  jacket structures which contain variable member
  properties in a text input file could exceed the
  1000 property group limitation and Redraw Solid
  would not use the correct property group. (No
  GPRF issued)
• An abort will no longer occur when creating
  finite elements using the Create Finite Elements
  Using Grid option. (No GPRF issued)

6
Version 27.1

• Corrections and Enhancements for Version 27.1 of
  GTSTRUDL
• Dynamics
• If joint constraints exist in the model, the
  assembly of the consistent mass and damping
  matrices now operates more efficiently.
  Previously, large demands on memory allocation
  occurred if joint constraints were present.
• GTMenu
• Member properties with variable pipe properties
  are now brought into GTMenu correctly. The
  members will be displayed correctly by Redraw
  Solid using the properties of the first variable
  segment. The properties will also be brought
  back to GTSTRUDL correctly. Previously in
  Version 27.0, variable pipe properties were
  brought into GTMenu incorrectly and Redraw Solid
  would draw incorrectly if variable pipe
  properties existed. (No GPRF issued)
• An abort will no longer occur when entering
  GTMenu with a model which contains Superelement
  and Group definitions. (No GPRF issued)
• The Mode Bar in GTMenu is no longer disabled
  following an Inquire using either a right mouse
  click or the use of the Inquire button. (No GPRF
  issued)

7
Versions 27.1 (cont)

• Nonlinear Analysis
• Nonlinear analysis will no longer abort when
  linear elastic connections are present and
  multiple loading conditions are active for the
  nonlinear analysis (GPRF 2003.5)
• Nonlinear Dynamic Analysis
• Nonlinear dynamic analysis now produces correct
  results for the case where the sign of the axial
  strain in tension/compression only, linear
  geometry frame members reverses between time
  points. (No GPRF issued)
• Reinforced Concrete Design
• The diameter of circular steel cage reinforcement
  is now reported correctly for the CP110 and
  BS8110 concrete design for round columns using
  the PRINT REINFORCEMENT command. (GPRF 2003.6)
• An abort in Proportioning columns designed using
  the ACI codes will no longer occur during the
  capacity check phase. (GPRF 2003.7)

8
Electronic Documentation

• PDF Electronic versions of Reference Manuals will
  no longer be Draft and will contain latest
  changes to documentation Revision S.

9
GTSTRUDL Startup Model Wizard

• New Tank Option on the Model Wizard for Circular
  Tanks with flat or hemispherical top and/or
  bottom

10
Model WizardNew Tank Wizard

• Geometry and top and bottom specification

11
Model WizardNew Tank Wizard (cont)

• Graphical display of geometry created using Tank
  Model Wizard while generating the model

12
Model WizardNew Tank Wizard

• Thickness and support specification including
  soil springs on bottom

13
Model WizardNew Tank Wizard

• Self-weight, internal pressure, and hydrostatic
  load specification

14
Model Wizard

• The Finite Element Mesh Model Wizard now includes
  In-Plane springs and Compression Only options for
  springs normal to the plane of the element. The
  Compression Only spring option will create a
  nonlinear spring curve and nonlinear spring
  elements. In-plane springs will be elastic
  springs.

15
Model WizardIn-Plane Springs and Compression
Only Springs
Compression only option
In-plane springs
16
Model WizardIn-Plane Springs and Compression
Only Springs Output
17
Model Wizard

• The Model Wizard can now be executed directly
  from the GTSTRUDL Output Window as shown below

18
GTSTRUDL Output Window

• The Import DXF option has been enhanced to
  convert lines and polylines into Construction
  Points and Lines which can later be used in
  GTMenu to create the model. The next dialog is
  shown on the next slide.

19
GTSTRUDL Output WindowImport DXF
New option to create Construction Points and
Lines
20
GTSTRUDL Output WindowImport DXF

• A new Properties tabbed dialog is available for
  Construction Points and Lines. The primary use
  is to establish the starting ids for the Points
  and Lines.

21
GTSTRUDL Output WindowAnalysis

• New options available under Analysis
• New Hyper-Column Solver for solving large
  problems. More data on this is on later slides.

22
GTSTRUDL Output WindowAnalysis

• Displacement control is now available in the
  Pushover Analysis dialog which is shown on the
  next slide. When displacement control is enabled
  and a pushover analysis load increment encounters
  convergence difficulties, the pushover analysis
  will switch to displacement control. The user
  may select joint displacement dofs to monitor
  and control.

23
GTSTRUDL Output WindowAnalysis Pushover Dialog
Displacement Control Option
24
GTSTRUDL Output WindowAnalysis

• A new Cable Analysis Wizard and dialogs have been
  implemented to facilitate the use of Cable
  Analysis

Cable additions
25
GTSTRUDL Output WindowAnalysis Cable Prestress
Analysis

• The Cable Analysis Steps option will guide you
  through the steps for a cable prestress analysis.
  

26
GTSTRUDL Output WindowAnalysis Cable Prestress
Analysis Step 1

• Define the cable network as well as sag and
  initial tension and the prestressing algorithm

27
GTSTRUDL Output WindowAnalysis Cable Prestress
Analysis Step 2

• Specify Cable Prestress Analysis Control Data and
  the Prestress Loading Condition

28
GTSTRUDL Output WindowAnalysis Cable Prestress
Analysis Step 3

• Execute the cable prestress analysis in Step 3
  (Perform Cable Prestress Analysis Command)

29
GTSTRUDL Output WindowResults

• New results datasheets have been added for Member
  End Forces, Section Forces, and Section Stresses.
  The Joint Displacement datasheet has been
  revised. An example of the new Member End Forces
  datasheet is shown on the next slide.

30
GTSTRUDL Output WindowNew Member End Force
Datasheet
31
GTSTRUDL Output WindowNew Member End Force
Datasheet

• In addition to the Sort and Filter functions that
  have been available in the Joint Displacement
  datasheet, you can now directly Print from the
  new datasheet

32
GTSTRUDL Output Window

• The Dynamic Analysis Inactive Modes dialog now
  has an option which will write the active mode or
  all data to the Output Window in three columns
  with the mode number and descending mass
  participation percentages for the X, Y, and Z
  directions.

33
GTSTRUDL Output WindowInactive Mode Dialog
New Write to Text Window button
34
GTSTRUDL Output WindowOutput to Output Window
from Inactive Model Dialog
35
GTSTRUDL Output WindowSteel Design

• A new option has been added to specify
  constraints of a section property to another
  section property of the same member. For
  example, constrain YDZD of the same member. The
  modified Constraint dialog is shown on the next
  slide.

36
GTSTRUDL Output WindowSteel Design Member
Constraints
37
GTSTRUDL Output WindowSteel Design Member
Constraints

• Member constraints created using the dialog are
  now compressed so similar constraints are
  combined. Previously, user specified constraints
  were displayed one line per member.

38
GTSTRUDL Output WindowSteel Design

• New parameters required to check and design the
  profiles added to the LRFD3 code have been added
  to the Parameters dialog. Also, the new LRFD3
  Tables have been added to the Parameters dialog.

39
GTSTRUDL Output WindowSteel Design

• The Steel Design Wizard now allows you to bypass
  some of the steps using defaults that are
  commonly used.

40
GTSTRUDL Output WindowSteel Design

• A new button has been added to the end of the
  Steel Design Wizard to create an input file (.gti
  file) and a database file (.gts). The input
  file contains analysis as well as the commands to
  execute the steel design process including
  PARAMETERS and CHECK commands.

41
GTSTRUDL Output WindowSteel Design
New Create Input File option
42
GTSTRUDL Output WindowSteel Design

• Create Cross Section Proeprties has been modified
  to use GTSTRUDL to create the Tables. The
  advantage of using GTSTRUDL to create the Table
  is that user can use long pathname. Also a new
  default option has been added to the Create
  Database which allows the user to display the
  results.

43
GTMenu

• Display model will now display the thickness of
  2D elements by color filling the interior of the
  element. Example is on the next slide.

44
GTMenuColor by thickness for finite elements
45
GTMenu

• New Boundary Outline Option under the Display and
  Label Settings which will display the outline of
  edges where only one finite element is attached
  to an edge. This is useful for locating problems
  in finite element models where two regions are
  joined but a gap still exists even after removing
  duplicate joints

46
GTMenuBoundary Outline

• Original model unable to see problem even after
  checking for duplicate joints with reasonable
  tolerance

47
GTMenuBoundary Outline

• Example illustrating problems with model using
  boundary outline

48
GTMenuBoundary Outline

• Display Label and Settings dialog has been
  modified to include Boundary Outline and Shrink
  settings

49
GTMenuBoundary Outline

• The Boundary outline option is also available in
  the Display Model dialog and under the Options
  Model Display dialog.

50
GTMenu

• Principal stresses may not be displayed using
  vectors for two-dimensional finite elements. The
  values of the principal stress as well as the
  angle with respect to the planar coordinate
  system may be labeled as shown on the next slide.

51
GTMenuPrincipal Stress Vectors
52
GTMenuPrincipal Stress Vectors
53
GTMenuPrincipal Stress Vectors

• New dialog for principal stress vectors

54
GTMenu

• Member forces at the ends of members may now be
  labeled (listed) on the graphical display of the
  structure.

55
GTMenu

• New dialog for member force listing. Components
  can be selected as well as the start and end of
  the members.

56
GTMenuMember force listing
57
GTMenuMember Force listing

• The member forces may also be output in the
  Inquire Output pop-up

58
GTMenu

• New HotKey sequences have been added for the
  Display Window to label joints, members, and
  elements
• LJ Label Joints
• LM Label Members and Finite Elements
• LA Label all joints, members, and finite
  elements
• Other New HotKeys
• W to initiate Windowing (Zoom) on the display
• lt and gt to rotate structure in the plane of the
  screen
• A to redraw the screen (again)

59
GTMenu

• A new button has been added to the Create
  Supports dialog to Draw Supports

60
GTMenu

• Table section longnames are displayed in Display
  Model and also listed using Inquire in the Output
  Box

61
GTMenu

• When a duplicate is found, the original name is
  now displayed in addition to the duplicate name

62
GTMenuDuplicate Joints

• The Duplicate Joint, Member, and Element dialogs
  and the Floating Joint dialog now have the option
  to send the output to a File or the Output Window
  as shown on the previous slide.
• The information sent to a File or the Output
  Window now has a line describing how the output
  was produced as shown below.

63
GTMenu

• Label settings are now saved in a given session
  and are retained when cycling between GTMenu and
  the GTSTRUDL Output Window
• A scroll bar has been added to allow viewing long
  load titles and dependent load descriptions
• The Create Member Property Prismatic and Create
  Material Group dialogs now have a button which
  will bring up the Calculator pop-up to facilitate
  the computation of properties.

64
GTMenu

• When creating a new loading, all currently used
  load names are now listed and classified to help
  in choosing the name for a new loading.

65
GTMenu

• A new option to create joints has been
  implemented. This option creates the joints by
  intersecting coordinates or spacing along one of
  the global axes with any number of lines.

66
GTMenuProject Axis on Lines

• New option under Create Joints to Project Axis on
  Lines

67
GTMenuProject Axis on Lines

• Specify lines to project axis onto
• Lines

68
GTMenuProject Axis on Lines

• Specify spacing in a table

69
GTMenuProject Axis on Lines

• New joints are then created on lines using the
  coordinates or spacing from the table on the
  previous slide

70
GTMenu

• GTMenu Point Coordinates and Lines are now
  written to the GTMenu Input File. Two new
  commands have been implemented to read the Point
  and Line information
• GTMenu Point Coordinates
• GTMenu Line Incidences

71
GTMenuInput File with Points and Lines

• Example of the Point and Line data now in the
  input file is shown below

72
GTMenu

• The GTMenu input file generator can now be
  accessed from Command Mode by the following
  command
• GTMenu Generate Input File filename

73
GTMenu

• A minimum of twenty-one (21) sections are now
  used by default to compute a member diagram or
  envelope regardless of section specifications.
  Eleven (11) sections are used to draw the
  deformed shape of a member.
• The boundary nodes of a Superelement can be
  listed in GTMenu in an Inquire box by specifying
  the name of the Superelement in list mode.

74
GTMenu

• When labeling the displacements on a deformed
  shape between the ends of a member, a preview
  line has been implemented which points to the
  nearest section location where the displacements
  will be labeled.

75
GTMenu

• Appropriate linking buttons have been added to
  the Line/Curve dialog. These buttons allow the
  user to go directly to the Create Members or
  Create Elements dialogs as shown on the next
  slide.
• Linking buttons have also been added to the
  Translate Joints to Points and Create Points in
  Circular Arc dialogs.

76
GTMenuLinking buttons in Create Line dialog
Linking buttons to go directly to Generate dialogs
77
GTMenu

• Section property groups are now alphabetized to
  make selection easier when choosing a Section
  property for a member
• When using Print Preview and Edit in GTMenu, the
  Scope Editor file is now automatically Saved
  without a name change. The default file name has
  been changed to Temp00x.SSC.

78
Dynamics

• The INERTIA OF JOINTS FROM LOAD command has been
  extended to include the conversion of
  translational force load components of both
  member and finite element loads to translational
  joint masses. Member loads are no longer
  converted to Member Added Mass but are converted
  directly to joint inertias. You can use the
  PRINT DYNAMIC JOINT INERTIA command to verify
  this.

79
Dynamics

• Efficiency improvements have been made to the
  assembly of dynamic mass and composite modal
  damping matrices. Models which contained rigid
  bodies and a large number of specified damping
  ratios for joint inertias are now able to
  assemble.

80
Dynamics

• Efficiency improvements have been made with
  regard to the assembly and use of the damping
  matrix for dynamic analyses. When damping data
  have been specified, the damping matrix is now
  assembled on demand and only when needed. For
  instance, the following sequence does not require
  damping matrices to be assembled
• Assemble for Dynamics
• Perform Eigenvalue Analysis

81
Finite Elements

• The CALCULATE SOIL SPRING VALUES command has been
  modified to allow the creation of in-plane
  springs and compression only springs. The
  in-plane springs will be a ratio of the normal
  springs. The compression only springs will be
  modeled using nonlinear spring elements which
  will be created automatically.

82
General

• The DEAD LOAD and SELF WEIGHT commands have been
  enhanced to include two- and three-dimensional
  finite elements in the computation of element and
  joint dead loads.
• The SUMMARY for LIST SECTION FORCES now has an
  option to include corresponding forces, e.g. for
  the section and load that causes the max MZ, you
  can also get the associated FX and FY.

83
General

• The UNITS command has been modified to include
  mass units as follows
• STANDARD
• STDMASS
• UNITS GRAM
• KGM
• MTNM

84
General

• New commands have been implemented to delete
  joints or members that do not have any data
  associated with them
• DELETE JOINTS WITHOUT JOINT - COORDINATES
• DELETE MEMBERS WITHOUT -
• MEMBER INCIDENCES
• DELETE ELEMENTS WITHOUT - ELEMENT INCIDENCES

85
General

• A new AREA LOAD command has been added. The AREA
  LOAD command is used to distribute loadings over
  defined regions of a structure to surrounding
  members as member loads. The member loads are
  applied in a global direction. The area must be
  completed enclosed by members. One way or two
  way load distribution options are available.

86
GeneralArea Load
87
General

• New LIST SUM FORCES command which may be used to
  calculate and report the summation of forces and
  moments at a specified point from a specified set
  of member and finite element nodal forces for
  all active static loading conditions. This
  command is similar to, but more general than, the
  CALCULATE RESULTANT command.

88
GeneralLIST SUM FORCES
89
GeneralLIST SUM FORCES

• The force and moment summation is computed for
  all active static loading conditions for which
  member end forces and finite element nodal forces
  have been computed by a prior STIFFNESS ANALYSIS
  or by the CREATE PSEUDO STATIC, COMBINE, and
  CREATE LOAD COMBINATION commands.

90
GeneralLIST SUM FORCES

• In the case of a pseudo static loading condition
  created from a response spectrum modal
  combination such as RMS or CQC, a force and
  moment summation is computed first for each mode
  of the root response spectrum load. The final
  mode combination force and moment summation is
  then computed by applying the mode combination
  rule of the pseudo static loading to the
  individual modal force and moment summations.

91
GTTABLE

• GTTABLE commands that are used to create table
  database are now available in GTSTRUDL. This
  means that you can use GTSTRUDL to create a table
  database. Table input files now can be executed
  by GTSTRUDL or GTTABLE.

92
New Static Analysis Solver

• A new static analysis solver has been implemented
  which is based on a blocked active column solver.
  The new solver is used when the following
  command is issued
• STIFFNESS ANALYSIS GTHCS
• where GTHCS stands for Georgia Tech Hyper-Column
  Solver.
• This solver is more efficient for very large
  problems and will solve problems which might not
  otherwise be solved due to the 2GB Windows
  limitation.

93
New Static Analysis Solver

• An example of the efficiency of the new static
  solver versus the existing solver is shown below
• Number of Joints 14,698 (6DOF)
• Band 468
• Time to solve using existing solver 4,242 sec
• Time to solve using GTHCS solver 2,840 sec

94
Nonlinear Analysis

• Pushover Analysis will be brought to release
  status in Version 28.
• Pushover Analysis now contains a new switchable
  displacement control option. When displacement
  control is enabled and a pushover analysis load
  increment encounters convergence difficulties,
  the pushover analysis will switch to displacement
  control. The user may select joint displacement
  dofs to monitor and control.

95
Nonlinear Analysis

• The primary stress-strain model due to Toader,
  Popov, et.al. used in plastic hinge analysis has
  been replaced by the more widely known models
  described by Priestley, et.al.
• The LIST CABLE LENGTHS command has been added for
  the output of the computed unstressed length of
  cable elements.

96
Nonlinear Dynamic Analysis

• Nonlinear dynamic analysis now supports the
  assembly of proportional and non-proportional
  stiffness and damping matrices from all sources.
  In previous versions, the damping factors from
  the CONSTANTS command were not supported.

97
Scope Editor

• You can now Copy and Paste from the clipboard.
  This allows copying from one Scope Editor (.SSC)
  file to another.
• You can now create a paragraph of text. The new
  Paragraph option is available under Tools. An
  example is shown on the next slide.

98
Scope Editor
Paragraph created using the new Paragraph option
99
Scope Editor

• New options are now available which will create
  only Horizontal or Vertical lines.
• You can now edit line end points. This will
  allow you to zoom in and properly connect
  intersecting lines which is especially useful
  when creating a border for a template.
• A Time/Date stamp is now available under Tools.

100
Steel Tables

• The following tables from AISC LRFD Third Edition
  have been implemented
• 2L-EQ-L3 Equal legs Double Angle, 2L, shapes from
  Table 1-14.
• 2L-LL-L3 Long legs back-to-back Double Angle,
  2L, shapes from Table 1-14.
• 2L-SL-L3 Short legs back-to-back Double Angles,
  2L, shapes from Table 1-14.
• 2LALL-L3 All Double Angles, 2L, shapes from Table
  1-14. This includes equal legs, long legs, and
  short legs back-to-back shapes.

101
Steel TablesAISC LRFD Third Edition

• W-LRFD3W shapes from Table 1-1.
• M/S/HPL3 M, S, and HP shapes from Tables
• 1-2, 1-3, and 1-4.
• C-LRFD3 American Standard Channels and
  Miscellaneous Channels from Tables 1-5 and 1-6.
• WT-LRFD3 Structural Tees split from W, M, and S
  shapes included in Tables 1-8, 1-9, and 1-10.

102
Steel Design

• Three new cross-sections have been added to the
  LRFD3 code. The new cross-sections are Channel,
  Tee, and Plate Girder. You may design and code
  check based on axial and bending effects for
  these cross-sections. One new parameter has been
  added for the channel cross-section and 10 new
  parameters for the plate girder cross-section.

103
Steel Design

• Double angle cross-sections under bi-axial
  bending now can be designed and code checked
  based on the LRFD3 code. Previously, double
  angle cross-sections could be code checked based
  on the tension or compression force only. Now,
  you can code check or design double angles based
  on axial and bending effects. LRFD3 code check
  for double angles considers members under tension
  , compression considering flexural-torsional
  buckling, modified column slenderness, check or
  design number of connectors, major and minor axis
  bending checks, major and minor axis shear
  checks, and combined axial and bending check.
  Three new parameters have been added for the
  double angle cross-sections code check based on
  the LRFD3 code.

104
Steel Design

• User specified values for yield and tensile
  strength parameters (FYLD, FTS, Py, Fy, Fu, etc.)
  are now checked for a range of possible valid
  values. There are times that the user specifies
  yield or tensile strength values (parameter FYLD,
  FTS, Py, Fy, Fu, etc.) in the wrong units or
  mistypes the parameter values which may result in
  an incorrect code check. If the user specified
  values for yield or tensile strength which is
  smaller than 20.0 ksi (24.82 MPa) or larger than
  200.0 ksi (8963.18 MPa), a warning message is
  issued.

105
Steel Design

• Joint, member, and load list options of the steel
  design and connection design commands are now
  checked for non-existing joints, members, or
  loads. If a user specifies joint, member, or
  load names that do not exist, an error message
  will be output listing the user specified joints,
  members, or loads that do not exist.

106
New Cell Tower Add-On Module

• A new Add-On Module will be available for the
  automated modeling, analysis, and design of
  monopole and latticed cell towers. Rob Abernathy
  will be presenting this later today and seeking
  input from you.

107
Future Enhancements

• New optional dynamic analysis eigenvalue equation
  solvers and data structures which bypass
  Microsofts 2GB limitation on the page file.
• Efficiency improvements in Steel Design for large
  models - especially those with a large number of
  design loading conditions.

108
Future Enhancements (cont)

• Graphically specify Area Loads
• 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

109
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
• Label Values on Diagrams and Envelopes
  automatically max and mins
• Mirror option under Copy Model in GTMenu
• List the contents of a Group in an Inquire box.
  Currently the contents can only be displayed
  graphically

110
Future Enhancements (cont)

• Add the option to Split Members to interpolate
  eccentricities between the start and end of the
  split members
• Locate a Global Plane with a pick on the
  structure. Currently a Global Plane requires a
  coordinate value
• 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

111
Future Enhancements (cont)

• SELECT or CHECK based on maximum forces
• Modify ASD9 code to allow for E to be specified
  such as when designing in a high temperature
  environment
• ACI 318-2002

112
Future Enhancements (cont)

• Continue expanding the model data and results
  which are available in Data Sheets. Use the new
  datasheets which allow printing.
• Select reinforcing steel for concrete slabs
  analyzed with finite elements.
• Design of steel structures subjected to
  displacement constraints.

113
Future Enhancements (cont)

• Graphically display plastic hinge status and
  other pushover information
• Create nonlinear spring and cable information in
  the input file created by GTMenu

114
Future Enhancements (cont)

• ISO 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

115
Future Enhancements (cont)

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

116
What do we need?

• As you break out into your committees, 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.