Multiframe 13.03 13 April 2011 Release Note Contents

Transcription

Multiframe v13.03 Release Note
Multiframe 13.03
13 April 2011
Release Note
This release note describes version 13.03 of Multiframe, Steel Designer and Section
Maker.
System Requirements:
 32-bit versions will run on Windows XP/Vista/7, and
 64-bit versions will run on Windows 7 64-bit.
Contents
Multiframe ............................................................................................................... 2
Changes between 13.02 and 13.03 ................................................................ 2
64 bit Versions ............................................................................................... 3
Add N-sided Patches & Openings ................................................................. 4
Select Patch Openings ................................................................................... 5
Edit Patch Openings ...................................................................................... 6
Delete Patch Openings ................................................................................... 6
Patch Mesh Patterns....................................................................................... 6
Wind Load Case (MF34D and MF4D only).................................................. 9
Short Term Loads for AIJ Steel Designer Code .......................................... 14
Lifting Analysis (MF3D and MF4D only) .................................................. 14
Multicore Analysis Optimisation................................................................. 15
Bug fixes and minor changes ....................................................................... 17
Problem Reports..................................................................................................... 17
Page 1
Multiframe
The following features have been modified or added to Multiframe in this release.
Changes between 13.02 and 13.03
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Fix to bug #3386: The Wind Load Case is now available to users of Multiframe
3D
Fix to bug #3400 Wind Load Case: Significant improvements have been made to
the identification of which side the model is the breadth (b) and which is the
depth (d). This is of particular relevance to sloping roofs with an angle of less
than 10 degrees (Table 5.3(A) AS1170). In addition, when calculating the
External Pressure Coefficient for Side Walls and Roofs with a slope less than 10
degrees for AS1170, a weighted average pressure coefficient is now used. This
is an improvement on the previous release which used the pressure coefficient
at the centre of the patch/panel.
Fix to bug #3373: Running a Linear analysis with Tension/Compression only
effects turned on, now runs correctly when there are only T/C only spring
supports in the model.
Fix to bug #3381: Corrected a problem which resulted in the Legend being very
small when printed.
Fix to bug #3383: Corrected a potential crash when checking node connections
when some nodes are not part of the frame.
Fix to bug #3384: Improved creation of patch openings where the opening
touches the side of the patch e.g. for a doorway
Fix to bug #3393: Corrected a problem with patch materials which were stored
in the Frame group rather than the sections library.
Fix to bug #3395: Masking now works correctly for spring members.
Fix to bug #3396: The max value set in Display - Plot settings now applies to all
load cases. Previously it only applied to the current load case.
Fix to bug #3401: Corrected a problem which could cause the Load panel
toolbar to constantly flicker in Multiframe 2D.
Fix to bug #3406: J values were corrected for aluminium sections in the US
sections library.
Fix to bug #3392/3385: Several issues with the Multiframe Export to text file
have been resolved. In particular this affected models with load panels.
Fix to bug #3389: AS4100 code: The calculation of βm for beams in single
curvature has been corrected (previously the value was positive when it should
be negative).
Fix to bug #3409: Corrected a problem which could cause the step in a shear
force diagram to be drawn as a slope.
Fix to bug #3391: Material properties for composite sections created in Section
Maker are now always loaded correctly in Multiframe.
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Page 2
Fix to bug #3325: Merge joints caused error message - invalid argument.
Fix to bug #3329: ‘Select all’ command did not select opening boundary nodes.
Fix to bug #3278: Added material to the design details datasheet.
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Fix to bug #3331: Patch point loads applied in incorrect positions.
Fix to bug #3335: Multiframe 13.01 files caused “- invalid argument” message
when doing analysis in older versions such as 11, 10 or 9. Now users can export
v13.0x files into v11 format through new command “Export to Multiframe v11”.
A number of small bugs when applying a Wind Load Case to members have
been fixed. These included problems when the wind is applied at an angle of 45
degrees to a vertical member and in the calculation of the effective breadth of
circular (CHS and bars) members.
Fix to bug #2991: Corrected a problem which could cause lots of labels to be
drawn along the bending moment diagram (particularly noticeable when using
load panels).
Fix to bug #3362: Corrected a problem with incorrect Reactions from patch
point loads due to wrong detection of plate edges.
The display of Self Weight loads has been improved, particularly for models that
contain members/patches with a slope close to vertical
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Fix to bug #3268: Added a warning message if patch corners are assigned to a
patch edge node or internal node.
Fix to bug #3276: Cannot create 3 sided opening.
Fix to bug #3277: Problems with AISC2005 capacity factor DLOG.
Fix to bug #3279: A crash in v13.0 when opening v12.11 files.
Fix to bug #3280: A crash on rendering the results when it does not exist.
Fix to bug #3287: Edge load values - not getting displayed.
Fix to bug #3289: File --> Import --> Multiframe Structure command crash.
Fix to bug #3293: A crash after joint merge & renumbering.
Fix to bug #3310: Subdivide (and create a design member) an offset member the new sub divided nodes are not offset.
Fix to bug #3313: Delete patch opening crash when some patches have invalid
dimensions.
Fix to bug #3314: Patch axis display error when first 3 nodes of a patch are colinear.
Fix to bug #3308: When printing plates or patches the printed colour was always
black. This has been corrected and the Plate/Patch prints with the correct colour.
The remainder of this document describes program changes between version 12 and
version13 of the software.
64 bit Versions
This release introduces 64-bit versions of all programs for the first time. You should use
the 64-bit Multiframe installer to install 64-bit versions only if you are running a 64-bit
version of Windows.
Please note that we have restricted our 64-bit versions to Windows 7 64-bit only to allow
us to take advantage of some of the new features available in future - it will not run on
XP 64-bit or Vista 64-bit.
Page 3
64-bit applications allow you to use larger amounts of memory and are somewhat faster
than 32-bit applications. On a 32-bit version of Windows, only a maximum of 2GB of
memory is available to any programs running. Under 64-bit Windows, applications can
theoretically utilise up to 128GB of memory. In practice if you get a 64-bit machine then
you will want to get 8-12GB of RAM.
For users with large designs, the 64-bit versions are highly recommended.
In addition – please note that users with NetSentinel dongles who wish to use the new
64-bit versions will need to contact us for a replacement dongle as these are no longer
supported.
Add N-sided Patches & Openings
Multiframe allows n-sided patches to be drawn. Add N-node patch command is
available from the Geometry menu or from the patch toolbar.
To add an N-sided patch
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Choose Add n-node Patch from the Geometry menu
Click in anti-clockwise order the N points or nodes that define the corners
of the patch
To add a N-side patch opening
Page 4
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Choose Add Patch Openings from the Geometry menu or icon button
Click in anti-clockwise order the N points or nodes that define the corners
of the patch opening
Select Patch Openings
There are many techniques and commands that are used to select patch openings. To
select a single patch opening

Click inside the patch opening
The selected patch opening is drawn with the current selection colour to make it appear
highlighted. A different colour for drawing the selection can be set via the Colour
command in the View menu.
To extend or reduce the selection

Shift-click on an unselected patch opening to add it to the current
selection
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Shift-click on a selected patch opening to remove it from the current
selection
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Shift-drag to invert the selection in the selection rectangle
To select a group of items
Page 5

Drag from left to right a rectangle which encloses the patch openings to
be selected
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Drag from right to left to select all patch openings which intersect or are
contained inside the selection rectangle
When performing a drag selection there are two techniques for items. The first is by
using a rectangular box as described above. An alternative to this is to use a line
selection in which the user drags the end of a straight line across the screen. In this case
all patches that intersect this line are selected.
Edit Patch Openings
To change the properties of a patch opening
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Double click on the patch opening in the Frame window
You can enter a label. If boundary only option is selected, Multiframe will add a
triangular mesh inside the area of the opening, but retain the opening boundaries. This
option will be very useful for users who wish to increase the mesh densities of certain
areas of a patch or retain a line segment or members inside a patch.
Delete Patch Openings
To delete a patch opening
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
Select patch openings in the Frame window
Press the delete key from key board or Choose Delete Patch Openings
from the Geometry menu
Patch Mesh Patterns
There are two types of triangular meshes for patches, uniform and non-uniform. 3- or 4sided patches without openings can be meshed in uniform patterns. All other patches
with or without openings have to be non-uniformly meshed.
At each patch or opening side, there are three mesh types, uniform, linear and bi-linear.
Page 6
To mesh a patch, you specify the mesh density, type and ratio along each side of the
patch and openings. In the patch property window, the user defined mesh type option has
been removed and replaced with a comprehensive patch side meshing algorithm. Each
segment/side has new fields such as density, type and ratio.
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Density – number of segments of a patch/opening side;
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Type – mesh type can be uniform, linear or bi-linear;
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Ratio – is the length proportion between longest sub-segment (Rmax) and the shortest
sub-segment (Rmin). If Ratio is negative, meshing along the patch/opening side will
be in an opposite direction.
With different combinations among density, type and ratio, users can create all kinds of
patch mesh patterns.
Page 7
Page 8
Wind Load Case (MF34D and MF4D only)
Multiframe 3D and 4D allow you to add a Wind load case, which automates the adding
of wind loads from a defined to direction to the whole structure.
To create a Wind Load Case

Choose Wind… from the Add Case menu in the Case menu
A dialog will be displayed which allows you to enter details of the wind strength and
direction and which variables you would like to be automatically calculated. Multiframe
converts this information loads on the structure.
Page 9
Wind Profile
Define the wind velocity profile as pairs of height and velocity values. A height of zero
is equivalent to the global axis origin ie y = 0. Use the Add Row button to increase the
number of points that defines the profile. Select a row and press Delete to remove a row.
The wind profile is shown graphically as you enter the values.
Air Density
Enter a value of air density. The wind pressure is calculated by
P = 0.5*air*V2*C
Where C is a combination of the user and shape factors
Wind Direction
Enter the wind direction. The wind is applied horizontally in the x-z plane. A value of
zero applied the wind along the x-axis. Positive angles of wind direction represent a
rotation anti-clockwise.
Include Members/Patches/Load Panels
Tick the include check boxes to include/ignore any type of element from having a wind
load applied.
Member Factors
Tick the check boxes to define which member factors are automatically calculated. If the
boxes are not ticked the default value is applied.
The member factors are:
 Kar – Aspect ratio factor. As defined by AS1170 Appendix E Table E1. Defaults
to 1.0.
 Ki – Inclination factor. As defined by AS1170 Appendix E2.1. Defaults to 1.0.
 Cf – Drag force coefficients. As defined by AS1170 Appendix E3. Defaults to
1.5.
Plate/Load Panel Factors – AS1170
Wind pressure loads on plates and load panels can be calculated based on Australian
Standard AS1170.2.2002. To use this method select the AS1170 radio button and the
following options will be made available.
Tick the check boxes to define which plate and load panel factors are automatically
calculated. If the boxes are not ticked the default value is applied.
The plate/laod panel factors are:
Ka – Area reduction factor. As defined by AS1170 Table 5.4. Defaults to 1.0.
Cp – External pressure coefficient. As defined by AS1170 Chapter 5.4. Defaults to 0.8.
h – Average roof height. Define the average roof height of the structure at which the
wind velocity for all patches/load panels will be taken.
Plate/Load Panel Factors – User Defined
If you do not want to use the pressure coefficients as defined by AS1170, select the radio
button labelled User Defined.
To define your own pressure coefficients, press the button Set Pressure Coeffs. The
following dialog will be displayed
Page 10
Enter values of pressure coefficient for each of the sides of your structure as described in
the diagram. For sloping sides it is possible to define different pressure coefficients for
varying angles of slope.
Include Friction Drag
Tick the Friction Drag button to include friction drag force to sidewalls and roofs that
run parallel with the defined wind direction. If Patches or Load Panels are not included
the Friction Drag force will not be applied to them.
The Friction Drag Force is calculated by
P = 0.5*air*V2*Cf*Cu
Where Cu is the user coefficient (default 1.0).
The default value of Cf, Friction Drag Coefficient, is taken to be 0.01. To change the
value of Cf use the Patch/Load Panel Wind Factors dialog, as described below.
Member Wind Shielding Factor
Edit the member wind shielding factor to account for any shielding within the structure.
One or more shielding factors can be changed at the same time by selecting multiple
member.
To edit the member wind shielding factor
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Select one or more members

Choose Member Wind Shielding Factor… from the Case menu
The following dialog will be displayed
Page 11
Member Wind Factors
The automatically calculated member wind factors for each individual member can be
edited via the Member Wind Factors dialog.
To edit the member wind factors
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Select one or more members
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Choose Member Wind Factors… from the Case menu
As well as allowing the factors to be changed the orientation of the section to the wind is displayed.
Patch Wind Factors
The automatically calculated patch wind factors for each individual patch can be edited
via the Patch Wind Factors dialog.
To edit the patch wind factors
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Select one or more patches
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Choose Patch Wind Factors… from the Case menu
Page 12
Load Panel Wind Factors
The load panel wind factors can be edited via the load panel wind factors dialog.
To edit the load panel wind factors
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Select one or more load panels
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Choose Load Panel Wind Factors… from the Case menu
A similar dialog to the Patch Wind Factors will be displayed.
Page 13
Short Term Loads for AIJ Steel Designer Code
The concept of short term loads have been introduced into the AIJ (Japanese) steel
design code.
As defined the AIJ code, if the loads are short term the allowable strength if increased by
50%. To define the loads as short term click the Short Term radio button in the Load
State section of the AIJ Design Check dialog.
To define the loads as short term

Ensure the AIJ code is chosen (Design -> Code -> AIJ)
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Select one or member
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Choose Check… from the Design menu
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Select Short Term from the Load State Group in the dialog shown below
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Click OK to run the design check
Lifting Analysis (MF3D and MF4D only)
A new type of analysis has been added for analysing frames which are used for lifting
calculations. Typical examples would be lifting of baskets and skids with slings which
are attached to a crane.
Page 14
Such models are typified by a lack of restraint in the horizontal plane which allows the
frame to either rotate or swing freely. If you model a frame like this you will often get
the error message “Solution does not make sense”. The lifting analysis function
automatically adds additional spring restraints to the model to provide sufficient
horizontal restraint to allow the model to be analysed. This eliminates the need for you to
apply your own manual spring restraints.
The stiffness of these restraints is automatically set by Multiframe so as to have a
minimal effect on the actions within the frame. They are set at a small proportion of the
other stiffnesses in the frame. While you are creating your structural model, you should
review the location of the centre of mass and ensure that the lifting point is located as
near as possible to a location directly above the centre of mass of the structure and its
loads.
Note also that when modelling slings or lifting cables you should release both moments
and torsion at the ends of those members. If you release all of the sling members
connecting to the lifting point, be sure to applied a fixed restraint to the lifting point to
prevent that node from rotating.
A lifting analysis is performed via the Lifting… command in the Analysis menu. A
lifting analysis is in fact a special type of linear analysis and as such the results of the
lifting analysis are stored as the results of a linear analysis. If your sling members are set
to Tension-Only, then a dialog will appear allowing you to take those effects into
account during analysis. You are no longer required to use a NonLinear analysis for
Tension-Only effects.
Some care must be taken in performing a lifting analysis as the additional spring
restraints added for the analysis will also help to suppress structural mechanisms. After
analysis is complete, you will notice that all nodes in the model will have reactions. You
should see normal reactions at any nodes where you have applied a restraint, and at other
nodes where automatic springs have been applied, you should see reactions with a small
value. These small reactions are a consequence of the automatically applied springs. If
you see unacceptably large reactions at any of these nodes, then you should use manual
spring restraints and carry out a normal linear analysis.
Multicore Analysis Optimisation
This release of Multiframe includes support for multicore cpu cores. If your computer
has multiple cores this feature will be enabled by default.
Page 15
In this release you will see only modest increases in performance. We will continue to
work on supporting more aspects of the solver in the future. However if your model has
a large number of plates you will see good improvements in analysis performance.
Page 16
Bug fixes and minor changes
Changes from 12.11 to 13.03:
 EC3: A bug where values of alpha and beta weren’t assigned for non-standard
section types in the Biaxial Bending check has been fixed
 AIJ code: A bug has been fixed where the value of M2/M1 in the calculation of C in
the flexure check should be negative if the moments along a member are all the
same sign
 AIJ code: A bug where C should be set to 1.0 and pb to 0.3 in the flexure
calculation if the maximum bending moment is not at the end of the member has
been fixed
 AIJ code: The calculations for the Bending and Compression check for H shaped
sections have been updated
 AIJ code: All of the parameters in the calculation of Me are now listed in the report
 AIJ code: A bug where the value of Lcy was not being reported correctly in the
Print Summary has been fixed
 Incorrect shear diagram shown for some members when performing a nonlinear
analysis using p-delta effects.
 Crash when calling GetActions() method of the ElementResults automation object.
 Issue 2934 - Toggle Grid Lock needs to be pressed twice on start up
 Issue 3183 - Rendered Results Plot Display not updating after running design
check.
 Cold formed and lightweight section types are no longer checked by limit state
Steel Designer codes (LRFD, EC3, AS4100) as they are not supported by these
codes. This now means that these sections do not fail these checks.
 Bugs involving the control of number of decimal places for distributed loads in
dialogs have been fixed
 AISC2005 Steel Designer Code: a bug where the capacity factors were not
displayed correctly if they had been changed by the user has been fixed. Please
note, previously the correct capacity factors were used in the design check
 A bug with the Wind Load Case where the Member Shape Factor was not changed
properly if changed by the user through either the Member Factors dialog or the
Data Tables has been fixed
 Bug 3308 – When printing plates or patches the printed colour was always black.
This has been corrected and the Plate/Patch prints with the correct colour.
Problem Reports
We greatly appreciate any bug reports or suggestions you may have. Please report any
bugs or anomalies you find to:
Fax: +61 8 9335 1526
Email: [email protected]
Page 17

Multiframe 13.03 13 April 2011 Release Note Contents

Transcription

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