Tekla Structural Designer

2023

Tekla Structural Designer

Floor Analysis Model (FAM) properties


Edit Note: The below properties are only displayed when the FAM is being edited
Entity type	Select the entity type to add or remove: Slab Item Member Span/Stack Facade Restraint - only available when Generate Facade Restraint is selected Spandrel Beam - only available when Generate Spandrel Beams is selected
Selection Mode	Determines what happens when you click on an entity of the selected type: Add or Remove Add Only Remove Only
Generate Facade Restraint	When selected, facade restraints are created around the external perimeter of slab items in the current floor analysis model (FAM). You can then add or remove individual facade restraints as required.
Generate Spandrel Beams	When selected, any beams around the external perimeter of slab items in the current FAM are marked as spandrel beams. You can then add or remove spandrel beam markings as required.


FAM
Name	The automatically generated name.
User Name	Can be used to override the automatically generated name if required.
Design Guide	The design guide on which the assessment is to be based. SCI P354 CCIP 016 AISC DG11
Settings	The FAM settings set applied to this FAM. Initially there will be a single settings set to choose from, generated from the Footfall Assessment Global Settings for the current design guide. Note: You can configure additional settings sets as required. From the Footfall Analysis ribbon click Settings, then on the Settings Sets Management page, click Add.


FAM > Meshing
Slab Mesh Size	Defines the slab mesh size. Applies to all 1-way slabs set to be meshed in the FAM Analysis Model Options.
Slab Uniformity Factor	Defines the mesh uniformity. (Default = 50%, where 100% = maximum uniformity). Applies to all 1-way slabs set to be meshed in the FAM Analysis Model Options.
Slab Mesh Type	Defines the mesh type for all meshed slabs in the FAM model. The options are: Quad dominant Quad only Tri only


Note: The initial properties displayed in the below Footfall Checks sections default to values taken from the *Footfall Assessment > (Design Guide)* > Footfall Checks** page in Global Settings.


Footfall Checks (SCI P354)
Item	Default	Range	Description
Cut off frequency	20 Hz	1-50	Frequency above which post processing calculations are not performed. Modes with frequencies above this value may be found (see Total number of modes in the Analysis Settings section above) but are not considered in the footfall calculation procedures. A warning is issued if this value is greater than the max modal frequency found. For guidance, refer to SCI P354 Table 6.1: Low frequency floor to high frequency floor cut-off
Consider all modes	On		When selected all modes below the Cut off frequency are considered.
No. of modes	10		This property is only displayed when Consider all modes is cleared. The Cut off frequency is ignored and the number of modes specified here are considered in the footfall post processing instead.
No. of harmonics	4	1 to 4	Not required for transient response.
Pacing frequency	1.80-2.20Hz@0.01	1 to 5Hz	Can be input as a single value or range and increment or series of values.
Walker's weight	76 (kg)	50 to 150 (kg)	Walker's weight.
Length of walking path	30 m	0.1 to 100m	Used in the resonance build up factor of resonant response and in VDV calculations for both resonant and transient response. Larger values result in conservative checks. If not known, provide a reasonable max value for best results.
Length of stride	0.75 m	0.1 to 2 m	Required for VDV
Damping ratio	3%	0 to 100%	The design guidelines provide recommended values of the damping ratio if more accurate values cannot be estimated. Refer to SCI P354 Table 4.1: Critical damping ratios for various floor types ζ
Axis of vibration perception	Z	X, Y, Z	In local coordinate system of the subject person. Only ‘Z’ is available in the current release.
BS 6841 weighting curve	Wb	Wb, Wd, Wg	The BS 6841 weighting curve used in the calculation of Weighting Factor, Wh, in resonant and transient responses.
Target vibration dose value (VDV)	0.2	0.1 to 2.0	The reciprocal of this value gives the number of times in a period that the target VDV is exceeded.
Consider VDV for Pass/Fail	Off		When selected, the pass/fail threshold is determined by the Target number of events in a period.
Target number of events in a period	1000	1 to 1000000	Defines the pass/fail threshold when ConsiderVDV for Pass/Fail is selected.
Target response factor, Rf	4	0 to 100	Unless Consider VDV for Pass/Fail is selected, the pass/fail threshold is determined by this value.
Acceptable hotspots	Off		When selected a General limit, Rf value (default 2.0) is set. Regions with Rf values between the general and upper limits will be given a warning status.


Footfall Checks (CCIP-016)
Item	Default	Range	Description
Cut off frequency	20 Hz	1-50	Frequency above which post processing calculations are not performed. Modes with frequencies above this value may be found (see Total number of modes in the Analysis Settings section above) but are not considered in the footfall calculation procedures. A warning is issued if this value is greater than the max modal frequency found.
Consider all modes	On		When selected all modes below the Cut off frequency are considered.
No. of modes	10		This property is only displayed when Consider all modes is cleared. The Cut off frequency is ignored and the number of modes specified here are considered in the footfall post processing instead.
No. of harmonics	4	1 to 4	Not required for transient response.
Pacing frequency	1.80-2.20Hz@0.01	1 to 5Hz	Can be input as a single value or range and increment or series of values.
Walker's weight	76 (kg)	50 to 150 (kg)	Walker's weight.
Length of walking path	30 m	0.1 to 100m	Used in the resonance build up factor of resonant response and in VDV calculations for both resonant and transient response. Larger values result in conservative checks. If not known, provide a reasonable max value for best results.
Length of stride	0.75 m	0.1 to 2 m	Required for VDV
Damping ratio	3%	0 to 100%	The design guidelines provide recommended values of the damping ratio if more accurate values cannot be estimated. Refer to Appendix A of CCIP-016 for suggested damping values for different structures.
Axis of vibration perception	Z	X, Y, Z	In local coordinate system of the subject person. Only ‘Z’ is available in the current release.
Target vibration dose value (VDV)	0.2	0.1 to 2.0	The reciprocal of this value gives the number of times in a period that the target VDV is exceeded.
Consider VDV for Pass/Fail	Off		When selected, the pass/fail threshold is determined by the Target number of events in a period.
Target number of events in a period	1000	1 to 1000000	Defines the pass/fail threshold when ConsiderVDV for Pass/Fail is selected.
Target response factor, Rf	4	0 to 100	Unless Consider VDV for Pass/Fail is selected, the pass/fail threshold is determined by this value.
Acceptable hotspots	Off		When selected a General limit, Rf value (default 2.0) is set. Regions with Rf values between the general and upper limits will be given a warning status.


Footfall Checks (AISC DG11)
Item	Default	Range	Description
Cut off frequency	20 Hz	1-50	Frequency above which post processing calculations are not performed. Modes with frequencies above this value may be found (see Total number of modes in the Analysis Settings section above) but are not considered in the footfall calculation procedures. A warning is issued if this value is greater than the max modal frequency found.
Consider all modes	On		When working to AISC DG11 this option can not be cleared.
Walker's weight	0.084 ton (US) 76 kg (metric)	0.055 to 0.165 ton 50 to 150 kg	Walker's weight.
Damping ratio	3%	0 to 100%	The damping ratio can be estimated using the component values in DG1 Table 4-2 if more accurate values are not available.
Axis of vibration perception	Z	X, Y, Z	In local coordinate system of the subject person. Only ‘Z’ is available in the current release.
Fig. 2-1 AISC DG11	Curve A	A, B , C	When determining the pass/fail status at a given node, the calculated peak acceleration at the dominant frequency is compared to the limiting peak acceleration obtained from the selected curve.


Overall Status & Envelopes
Mass Combination	When displaying the overall status and envelopes choose whether to consider all footfall mass combinations, or an individual combination only.
Response Type	When displaying the overall status choose whether to consider all response types, resonant only, or transient only. Selecting 'None' excludes this FAM from overall footfall status consideration.

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