Analysis model properties

Analysis model tab


Option	Description
Analysis application	The analysis application or format used in the analysis of the analysis model. To use the same application or format by default for other new analysis models, select the Set as the default check box. See also Link Tekla Structures with an analysis application.
Analysis model name	A unique name for the analysis model. User-definable. For example, you can use a name that describes the portion of the physical model that you want to analyze. To define the export folder for the analysis model, click Browse for export folder.
Analysis model filter	Defines which objects to include in the analysis model, based on the list of available selection filters. See also Filters in analysis models.
Bracing member filter	Defines which of the included objects are considered to be braces. The analysis nodes of braces can move more freely than the ones of primary analysis parts when the analysis model is created.
Secondary member filter	Defines which of the included objects are considered to be secondary analysis parts. The nodes of secondary analysis parts can move more freely than the ones of primary analysis parts when the analysis model is created.
Analysis model content	Defines which objects are included in the analysis model. The options are: Selected parts and loads Only includes selected parts and loads, and parts created by components, when they match the analysis model filter. To later add or remove parts and loads, use the Add selected objects or Remove selected objects button in the Analysis & Design Models dialog box. Full model Includes all main parts and loads, except for parts whose analysis class is Ignore. Tekla Structures automatically adds physical objects to the analysis model when they are created and when they match the analysis model filter. Floor model by selected parts and loads Only includes selected columns, slabs, floor beams, and loads when they match the analysis model filter. Tekla Structures replaces columns in the physical model with supports. See also Analysis model content.
Use rigid links	Use to allow or prevent rigid links in the analysis model. The options are: Enabled Rigid links are created if they are needed to connect analysis parts. Disabled, with keep axis: Default No rigid links are created. The Keep axis position settings of the analysis parts are not changed. Disabled, with keep axis: No No rigid links are created. The Keep axis position settings of the connected analysis parts are changed to No. If you use Tekla Structural Designer as the analysis application, you can use the Enabled option for concrete parts. The Disabled, with keep axis: Default option is automatically used for steel parts.
Analysis model rules	Click to create rules to define how Tekla Structures handles individual parts in the analysis model, and how parts are connected with each other in the analysis.
Curved beams	Defines whether beams are analyzed as curved beam or as straight segments. Select either: Split into straight segments Use curved member Use the advanced option XS_AD_CURVED_BEAM_SPLIT_ACCURACY_MM in File menu > Settings > Advanced Options > Analysis & Design to define how closely straight segments follow the curved beam.
Consider twin profiles	Defines whether twin profiles are considered as one part (Enabled) or as two parts (Disabled) in the analysis.
Member axis location	Defines the location of each analysis part in relation to the corresponding physical part. The options are: Neutral axis The neutral axis is the analysis axis for all parts. The location of the analysis axis changes if the profile of the part changes. Reference axis (eccentricity by neutral axis) The part reference line is the analysis axis for all parts. The location of the neutral axis defines axis eccentricity. Reference axis The part reference line is the analysis axis for all parts. Model default The analysis axis of each part is defined individually according to the analysis part properties. To define the axis location of specific parts, use the Position tab in the appropriate analysis part properties dialog box. If you select Neutral axis, Tekla Structures takes the part location and end offsets into account when it creates nodes. If you select either of the Reference axis options, Tekla Structures creates nodes at part reference points.
Member end release method by connection	Defines whether the support conditions of parts (No) or connections (Yes) are used.
Automatic update	Defines if the analysis model is updated according to the changes in the physical model. The options are: Yes - Physical model changes are considered No - Physical model changes are ignored
Model merging with analysis application	Only use with SAP2000 when changes occur in the Tekla Structures physical or analysis model that has already been exported to the analysis application. Defines whether the changed analysis model is merged with the previously exported model in the analysis application. The options are: Disabled Models are not merged. Additions made in the analysis application to the previously exported model are lost. A new model is created every time you export the analysis model to the analysis application. Enabled Models are merged. Additions made in the analysis application to the previously exported model are retained when you re-export the analysis model to the analysis application. The model in the analysis application is updated with the changes from Tekla Structures.

Analysis tab


Option	Description
Analysis method	Defines whether second order stresses are taken into consideration. The options are: 1st order Linear analysis method. P-Delta A simplified second order analysis method. This method gives accurate results when deflections are small. Non-linear Non-linear analysis method.
Maximum number of iterations	Tekla Structures repeats second order iteration until it reaches one of these values.
Accuracy of the iteration
Modal analysis model	Select Yes to create a modal analysis model and to use modal analysis properties instead of static load combinations.

Job tab

Defines the job information in STAAD.Pro reports.

Output tab

Defines the contents of the STAAD.Pro analysis results file.

Seismic tab

Use the Seismic tab to define which building code to follow in the seismic analysis and the properties required by the seismic analysis. These properties vary depending on the code you select.


Option	Description
Type	The building code to use to generate seismic loads. The options are: None: Seismic analysis not run. UBC 1997: Uniform Building Code 1997 UBC 1994: Uniform Building Code 1994 IBC 2000: International Building Code 2000 IS 1893-2002: Indian Standard. Criteria for Earthquake Resistant Design of Structures IBC 2003: International Building Code 2003 IBC 2006: International Building Code 2006 IBC 2006 (ZIP): International Building Code 2006, with an option to add a ZIP code in the properties IBC 2006 (Longitude/Latitude): International Building Code 2006, with an option to add longitude and latitude information in the properties AIJ: Japanese code Response spectrum: Response spectrum specification
Seismic properties	Depending on the code you select, you can define various seismic properties.

Seismic masses tab

The loads and load groups included in the seismic analysis.

Modal analysis tab

Use the Modal analysis tab to define the properties required by the modal analysis.


Option	Description
Count of modes	The number of natural mode shapes in the structure.
Max frequency	The maximum natural resonant frequency of the structure.
Modal analysis masses	The loads and load groups included in the modal analysis.

Design tabs

Use the Design tabs for steel, concrete, and timber to define the codes and methods to use in structural design. The design options available vary depending on the material.


Option	Description
Design code	Design codes for different materials. The design code options available vary depending on the analysis application you use.
Design method	The material-specific principle used to compare stresses and material capacities. The options are: None Tekla Structures only runs a structural analysis and creates data on stresses, forces, and displacements. Available for steel, concrete, and timber. Check design Tekla Structures checks whether the structures fulfill the criteria in the design code (whether cross sections are adequate). Available for steel and timber. Calculate required area Tekla Structures defines the required area of reinforcement. Available for concrete.
Design properties	The design code and method specific design properties of the analysis model that apply to all parts in the analysis model. When you select a design code and method for a material, Tekla Structures lists the design properties in the lower part of the Design tab. To change the value of a particular property, click on an entry in the Value column. The units depend on the settings in File menu > Settings > Options > Units and decimals. To change the design properties of a specific part, use the Design tab in the appropriate analysis part properties dialog box.