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2018 Table of Contents

More accurate analysis models and other analysis and design improvements

Last updated March 21, 2018 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 
2018

More accurate analysis models and other analysis and design improvements

More accurate analysis models and other analysis and design improvements

Tekla Structures 2018 comes with many important improvements in analysis and design.

New method of generating analysis models

The method Tekla Structures uses to create analysis models has been improved in version 2018. Analysis parts are now automatically connected more accurately, and the nodes are created at correct locations. This results in simpler and clearer analysis models, and reduces the amount of rigid links and the need of manual editing in the analysis models. For example, beams, columns, and braces may now be connected using a single common nodeanalysis model object that Tekla Structures creates at a defined point of an analysis model based on analysis part connectivity

Tekla Structures creates nodes at ends and intersection points of analysis parts, and the corners of analysis areas.

, instead of several nodes and rigid links.

Physical model Analysis model (2017i) Analysis model (2018)

If you open an existing model with analysis models in Tekla Structures 2018, and activate an analysis modelstructural model that is created from a physical model and used on the one hand for analyzing structural behavior and load bearing, and on the other hand for design

Analysis model can be viewed in Tekla Structures in a model view.

Analysis model that is made with Tekla Structures can be worked on in other analysis and design software or application.

, Tekla Structures recreates the analysis model using this new method.

If you need to revert to the analysis model creation method used in Tekla Structures 2017i and previous versions, set the new advanced option XS_​AD_​ANALYSIS_​PLANES_​ENABLED to FALSE. This advanced option is model specific.

Export to Tekla Structural Designer using an analysis model

You can now export a Tekla Structures analysis model to Tekla Structural Designer along with the physical modelstructural model with a direct or indirect counterpart in the structure to be built

. Previously you could only export the physical model to Tekla Structural Designer. Tekla Structural Designer now imports the analysis model with the physical model, and the resulting model and the analysis resultsresults that concern forces and stresses and that an analysis application generates after it has run a structural analysis on an analysis model

Analysis results are stored in Tekla Structures in an analysis results database.

are more accurate.

For example, the concrete beams can be positioned in various ways in relation to their reference axis in Tekla Structures , and still they will be connected to the concrete columns in the Tekla Structural Designer model.

Also the analysis partanalysis model object that is a representation of a physical part in an analysis model

In different analysis models, a physical part is represented by different analysis parts.

start and end releasesanalysis part properties that define the support conditions and describe the degrees of freedom at the end of the part

are now exported to Tekla Structural Designer.

To export an analysis model to Tekla Structural Designer, do one of the following:

  • Use the new command Export > Tekla Structural Designer with analysis model on the File menu.
  • If you have set Tekla Structural Designer as the analysis application for an analysis model, in the Analysis & Design Models dialog box, select the analysis model and click Export.

For more information, see Export a model from Tekla Structures to an analysis application.

See also Link Tekla Structures with an analysis application.

Import changes from Tekla Structural Designer to an analysis model

Now in Tekla Structures 2018, you can import the changes you have made in Tekla Structural Designer and update the corresponding analysis model in Tekla Structures. You can import the new parts created in Tekla Structural Designer, profile and material changes, and analysis results.

The location of existing parts does not change in Tekla Structures even if you have moved the corresponding parts in Tekla Structural Designer.

To import the changes from Tekla Structural Designer, select the analysis model in the Analysis & Design Models dialog box in Tekla Structures and click Get results.

For more information, see Import changes from Tekla Structural Designer to an analysis model.

Improvements in defining analysis model content and filters

The methods of defining the contents of an analysis model have been improved. Analysis model filters for primary and secondary analysis parts have been improved, and a new filter for bracing has been added. The analysis model filters are based on selection filters. You no longer need to reapply the analysis model filters if there have been changes in the physical model or analysis model content.

The automatic recognition of the secondary and bracing parts only works in some particular cases, such as for trusses.

Changes in the Analysis model properties dialog box

In the Analysis Model Properties dialog box, the settings on the Analysis model tab have been improved and reorganized.

  • The order of the settings has been changed as follows:

  • Tekla Structural Designer is now available as an option in the Analysis application list.
  • Creation method has been renamed to Analysis model content , and the default value is now Selected parts and loads.
  • Filter has been renamed to Analysis model filter.
  • A new setting Bracing member filter has been added.

    Use Bracing member filter to define which of the included analysis model objects are considered to be braces. The analysis nodes of the braces can move more freely than the ones of the primary analysis parts when the analysis model is created.

  • Secondary member filter has been updated: the Auto-detect secondary members option and the Reapply to all parts check box have been removed.

    Use Secondary member filter to define which of the included analysis model objects are considered to be secondary analysis parts. The nodes of the secondary analysis parts can move more freely than the ones of the primary analysis parts when the analysis model is created.

  • The More settings button has been removed, and all the settings are visible right away.
  • The Default keep axis for secondary members setting has been removed.

For more information about the analysis model propertiessettings that are defined by giving values to the properties associated with an analysis model

Analysis model settings can be defined in the physical model or in the analysis model.

, see Analysis model properties.

Changes in analysis classes and node colors

Tekla Structures 2018 introduces new analysis classes for braces:
  • Bracing
  • Bracing - Truss
  • Bracing - Truss-Compression only
  • Bracing - Truss-Tension only
  • Bracing - Ignore

The colors of the analysis part classes have been changed as follows to make it easier to recognize different parts in the analysis model:

  • Primary analysis parts Beam and Column have been changed from red to blue.
  • The new classpart property that groups parts according to identifiers given by the user

    The identifiers of classes are usually numbers. Classes can be used for defining the color of parts in the model, for example. Class does not influence the numbering of model objects.

    Bracing is green.

    Bracing - Truss , Bracing - Truss-Compression only , and Bracing - Truss-Tension only are the same colors as the corresponding primary classes.

  • Secondary has been changed from red to orange.

Note that the analysis application you use may not support all of the analysis classes or colors.

The shades of analysis node colors have been changed slightly.

Showing analysis member and node numbers

It is now easy to show or hide the analysis member and node numbers in model views. Previously, you needed to use the advanced optionssettings used to customize Tekla Structures for specific companies, standards, users, or user groups

In Tekla Structures, advanced options are settings that are used, for example, in a specific project or geographical area, or by a specific company.

In Tekla Structures, advanced options usually begin with the initials XS and are followed by the name of the function, for example XS_BACKGROUND_COLOR.

XS_​AD_​MEMBER_​NUMBER_​VISUALIZATION and XS_​AD_​NODE_​NUMBER_​VISUALIZATION. Now you can go to the Analysis & design tab on the ribbon, and click:

  • Member numbers to switch the member numbers on or off
  • Node numbers to switch the node numbers on or off

New separate selection toolbar for analysis objects

The selection switches for the analysis model objects now have a separate toolbar:

To show or hide the toolbar, go to the Analysis & design tab and click Analysis toolbar.

Alternatively, you can use Quick Launch : start typing analysis selecting , and then select or clear the Analysis selecting toolbar check box in the list that appears.

See also Other user interface changes.

Other improvements and fixes in analysis and design

  • If you use Tekla Structural Designer as the analysis application, no rigid links are created between steel parts in the analysis model. For steel parts, the Disabled, with keep axis: Default option is automatically used for the Use rigid links setting in the Analysis Model Properties dialog box. For concrete parts, you can use the Enabled option.

    Also, Keep axis position is set to No in the analysis properties of primary steel parts.

  • If there is a connection between parts in the physical model, the parts are now connected in the analysis model as well, even when the parts do not clash in the physical model. Previously, this did not happen in connections with one secondary part(1) part that exists in a building object and that is connected to the main part

    (1) Secondary part can be an assembly secondary part or a cast unit secondary part.

    (2) input part that the user selects after selecting the component main part when creating a component

    (2) A component can have none, one or more component secondary parts.

    only.
  • Tekla Structures now takes the fittings that extend or shorten physical parts into account when it creates analysis models, and the analysis parts are connected correctly.
  • Now when you use the Inquire command to check an analysis nodeanalysis model object that Tekla Structures creates at a defined point of an analysis model based on analysis part connectivity

    Tekla Structures creates nodes at ends and intersection points of analysis parts, and the corners of analysis areas.

    , the node coordinates are also shown according to the local (work planeplane that the user has chosen in a model and that is currently active for working on in a model view

    Newly created, copied, or moved model objects comply with the work plane. For example, shifting the work plane to follow a sloped plane makes it easier to model sloped structures.

    ) coordinate system.
  • Tekla Structures checks that slabs, panels, and walls are planar and shows a warning if one or more analysis nodes are out of the plane. The Inquire object dialog box shows the distances between this kind of nodes and the plane.
  • Vertical and diagonal parts created by the Truss (S78) component are now handled as braces in the analysis.

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