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Can we check an allowable bearing pressure against serviceability loads in Tekla Structural Designer?

Question We often receive Soil Investigation Reports with allowable bearing pressures for use with pad / strip footing design which can be used in accordance with BS EN 1997 CL 2.5 "Design by prescriptive measures". This capability is available in Tekla Tedds, where the allowable bearing pressure is checked against the SLS Loads applied. Is a similar option available within Tekla Structural Designer as it would appear it will only check bearing capacity based upon the ULS design bearing pressure against the net ultimate bearing capacity? Answer Tekla Structural Designer can undertake
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
5
  • Prescriptive measure
  • SLS
  • Bearing Pressure

I have a Validation > Model > Slab/Mats > “Foundation mat with ground bearing springs not meshed” warning. Why do I get this and how do I resolve it?

Question I have a Validation > Model > Slab/Mats > “Foundation mat with ground bearing springs not meshed” warning. Why do I get this and how do I resolve it? . Answer When you define a mat foundation using the Foundations ribbon tab > Mats group you can define the Soil Parameters including the Use ground bearing springs option within the Properties window. With this option checked the mat is supported on ground bearing springs located at the analysis mesh nodes to model the soil interaction under the foundation. This is achieved in the underlying solver model by including the
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • validation
  • warning
  • Foundation mat with ground bearing springs not meshed

Tekla Structural Designer 2018 Service Pack 3

This release will upgrade your Tekla Structural Designer installation to version number 18.0.3.12 and should be installed to ensure optimum function of the program.   It includes a number of enhancements and issue resolutions as detailed below.  If you are upgrading from a version earlier than Tekla Structural Designer 2018 Service Pacl 2 (version 18.0.2.05) you can find details of enhancements and fixes included in all previous releases in Tekla User Assistance (TUA) and Tekla Downloads via the links below: Tekla User Assistance Main version release notes Tekla User Assistance Service Pack
by Tekla Structural Designer Development Team
5

Can we check an allowable bearing pressure against serviceability loads in Tekla Structural Designer?

Question We often receive Soil Investigation Reports with allowable bearing pressures for use with pad / strip footing design which can be used in accordance with BS EN 1997 CL 2.5 "Design by prescriptive measures". This capability is available in Tekla Tedds, where the allowable bearing pressure is checked against the serviceability loads applied. Is a similar option available within Tekla Structural Designer as it would appear it will only check bearing capacity based upon the ULS design bearing pressure against the net ultimate bearing capacity? Answer Tekla Structural Designer can
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • Allowable bearing pressure
  • Design by prescriptive measures
  • Bearing capacity

I have a Validation > Analysis > General > “Settlement loads applied in unfixed direction” error. Why do I get this and how do I resolve it?

Question I have a Validation > Analysis > General > “Settlement loads applied in unfixed direction” error. Why do I get this and how do I resolve it? Answer Before we look at the Settlement loads validation error let us consider a support in more detail. A support can have 6 degrees of freedom, Translational Fx, Fy, Fz and Rotational Mx, My, Mz. Each degree of freedom (DOF) can be either Fixed or Free. When a degree of freedom is set as Free, it can either be Released or act as a Linear or Non-linear spring. If you set the support as a spring then you define the Stiffness to be
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • Validation-Analysis
  • validation
  • error
  • Settlement loads applied in unfixed direction

How do I apply rotational base fixity to a column?

Rotational base fixity can be assigned to the support under a column via the Properties window. For the selected support the translational and rotational degrees of freedom can be assigned. These can be Fixed or Free. If Free then a stiffness can be assigned as either Release, Spring Linear, Spring Non-linear, Nominally Pinned or Nominally Fixed. Before we assign a stiffness, however, it is crucial that we understand the local coordinate system for the column and support. The Help system provides an explanation for the special case for 1D members and a general case for 1D members. We will
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • base fixity
  • Rotational stiffness
  • Nominally pinned
  • Nominally fixed

I have a Validation > Model > General > “Supports exist within area of Mat Foundation” warning. Why do I get this and how do I resolve it?

Question I have a Validation > Model > General > “Supports exist within area of Mat Foundation” warning. Why do I get this and how do I resolve it? Answer If you hover over one of the problem items a tooltip is displayed “Delete supports unless they are intended to assist the Mat”. You can double click the “Supports exist within area of Mat Foundation” warning or items listed under the branch to highlight the selected items with the warning. Alternatively, you can right click and choose Highlight Items from the context menu. The view will automatically switch to the Structure 3D
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • validation
  • warning
  • Supports exist within area of Mat Foundation

I have a Validation > Model > Walls > “Openings in walls with internal piers” warning. Why do I get this and how do I resolve it?

Question I have a Validation > Model > Walls > “Openings in walls with internal piers” warning. Why do I get this and how do I resolve it? Answer If we hover over one of the problem items a tooltip is displayed “Openings will only be considered in meshed wall panels”. We can double click the “Openings in walls with internal piers” warning or items listed under the branch to highlight the selected items with the issue. Alternatively, you can right click and choose Highlight Items from the context menu. If the item is not visible in the current view then the view will automatically
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • validation
  • warning
  • Openings in walls with internal piers

I have a Validation > Analysis > General > Supports > “Support Collision” error. Why do I get this and how do I resolve it?

Question I have a Validation > Analysis > General > Supports > “Support Collision” error. Why do I get this and how do I resolve it? Answer If you hover over one of the problem items a tooltip is displayed “Two supports have been defined at a node”. We can double click the “Support collision” error or items listed under the branch to highlight the selected items with the issue. Alternatively, you can right click and choose Highlight Items from the context menu. If the items are not visible in the active scene view then the view will automatically switch to the Structure 3D
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • Validation-Analysis
  • validation
  • error
  • Support Collision

I have a Validation > Analysis > General > “Section torsional moment of inertia is invalid” error. Why do I get this and how do I resolve it?

Question I have a Validation > Analysis > General > “Section torsional moment of inertia is invalid” error. Why do I get this and how do I resolve it? Answer To obtain this validation error you will have created your own user defined section within the Material Section database but incorrectly defined the minor axis moment of inertia property and then subsequently used the section in the model. Following an analysis the validation error would be displayed. The resolution steps are the same as an existing article “I have a Validation > Analysis > General > “Section major
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • Validation-Analysis
  • validation
  • error
  • Section torsional moment of inertia is invalid

I have a Validation > Analysis > General > “Section minor axis moment of inertia is invalid” error. Why do I get this and how do I resolve it?

Question I have a Validation > Analysis > General > “Section minor axis moment of inertia is invalid” error. Why do I get this and how do I resolve it?   Answer To obtain this validation error you will have created your own user defined section within the Material Section database but incorrectly defined the minor axis moment of inertia property and then subsequently used the section in the model. Following an analysis the validation error would be displayed. The resolution steps are the same as an existing article “I have a Validation > Analysis > General > “Section major
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • Validation-Analysis
  • validation
  • error
  • Section minor axis moment of inertia is invalid

I have a Validation > Analysis > General > “Section major axis moment of inertia is invalid” error. Why do I get this and how do I resolve it?

Question I have a Validation > Analysis > General > “Section major axis moment of inertia is invalid” error. Why do I get this and how do I resolve it? Answer To obtain this validation error you will have created your own user defined section within the Material Section database but incorrectly defined the major axis moment of inertia property and then subsequently used the section in the model. Following an analysis the validation error would be displayed. If we hover over the Section major axis moment of inertia is invalid validation error or an item listed within the branch, a
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • Validation-Analysis
  • validation
  • error
  • Section major axis moment of inertia is invalid

I have a Validation > Analysis > General > “Section area is invalid” error. Why do I get this and how do I resolve it?

Question I have a Validation > Analysis > General > “Section area is invalid” error. Why do I get this and how do I resolve it? Answer To obtain this validation error you will have created your own user defined section within the Material Section database but incorrectly defined the cross sectional area property and then subsequently used the section in the model. Following an analysis the validation error would be displayed. If we hover over the Section area is invalid validation error or an item listed within the branch, a tooltip is displayed “A member has an invalid or zero
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • Validation-Analysis
  • validation
  • error
  • Section area is invalid

I have a Validation > Model > General > “Model coordinates too large” error. Why do I get this and how do I resolve it?

Question I have a Validation > Model > General > “Model coordinates too large” error. Why do I get this and how do I resolve it? Answer A Model coordinates too large validation error occurs if the nearest model node to the 0,0 origin is located greater than a radius of 1 km away. If we hover over the Model coordinates too large validation error a tooltip is displayed “Model further than 1.0 km from the origin”. Since this is a validation error you are unable to proceed to an analysis or design until it is rectified. This validation error would typically occur following a building
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
5
  • Validation-Model-General
  • validation
  • error
  • Model coordinates too large

I have a Validation > Model > Loads > “Temperature load defined on rigid diaphragm” warning. Why do I get this and how do I resolve it?

Question I have a Validation > Model > Loads > “Temperature load defined on rigid diaphragm” warning. Why do I get this and how do I resolve it? Answer A Temperature load defined on rigid diaphragm validation warning occurs when you have applied a temperature load to a slab panel but the slab panel is defined as a diaphragm with the Diaphragm option set to “Rigid”. If you hover over the Temperature load defined on rigid diaphragm validation warning or an item within the folder branch a tooltip advises “A temperature loading is applied to an area of rigid diaphragm - no effect will
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • Validation-Model-Loads
  • validation
  • warning
  • Temperature load defined on rigid diaphragm

I have a Validation > Model > Loads > “Temperature load defined to non-meshed slab” warning. Why do I get this and how do I resolve it?

Question I have a Validation > Model > Loads > “Temperature load defined to non-meshed slab” warning. Why do I get this and how do I resolve it? Answer If you hover over the Temperature load defined to non-meshed slab validation warning or a temperature load listed within the folder branch a tooltip advises “A temperature loading is applied to a slab which is not modelled in the 3D analysis - no effect will be seen in model”. This validation warning occurs if a temperature load is applied to a slab and the 2-way slab is not meshed in the 3D analysis. This is because there are no
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • validation
  • warning
  • Validation-Model-Loads
  • Temperature loads defined to non-meshed slab

I have a Validation > Model > General > “Beam centre-line is outside slab plane / boundary” warning. Why do I get this and how do I resolve it?

Question I have a Validation > Model > General > “Beam centre-line is outside slab plane / boundary” warning. Why do I get this and how do I resolve it? Answer A Beam centre-line is outside slab plane / boundary validation warning occurs if you have adjusted the alignment of the beam such that the centre-line of the beam is now located outside the slab boundary. If we hover over the Beam centre-line is outside slab plane / boundary validation warning or an item listed within the branch, a tooltip is displayed “Beam will not receive slab loads, consider changing alignment”. Hence,
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
5
  • Validation-Model-General
  • validation
  • warning
  • Beam centre-line is outside slab plane / boundary

I have a Validation > Analysis > FE chase-down > “Pattern load status not defined” warning. Why do I get this and how do I resolve it?

Question Following an analysis or design I have a Validation > Analysis > FE chase-down > “Pattern load status not defined” warning. Why do I get this and how do I resolve it? Answer If we hover over one of the problem items a tooltip is displayed “No panels have been set as unloaded in this pattern case”. This means that you have opted to consider pattern loading by checking the option “Patten load” in the Load ribbon > Loadcases dialog but you have not looked at the loaded/unloaded arrangement of slab panels to define the patterns you wish to consider for this load case. All
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • validation
  • warning
  • Pattern load status not defined

I have a Validation > Model > General > “Alignment offset” warning. Why do I get this and how do I resolve it?

Question I have a Validation > Model > General > “Alignment offset” warning. Why do I get this and how do I resolve it? Answer An Alignment offset validation warning occurs if you have defined the physical geometry of the section such that the alignment wire (insertion line) does not lie within the cross section. It would be useful to refer you to the Member Connectivity topic within the Analysis section of the Tekla Structural Designer Help system at this point for you to gain an understanding of how the analysis model is constructed and an appreciation of the alignment wire (
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • Validation-Model-General
  • validation
  • warning
  • Alignment offset

I have a Validation > Model > General > “Effective width is greater than automatically calculated value” warning. Why do I get this and how do I resolve it?

Question I have a Validation > Model > General > “Effective width is greater than automatically calculated value” warning. Why do I get this and how do I resolve it? Answer When defining a composite beam the effective width is automatically calculated in accordance with the respective Head code rules. It is possible following model geometry edits i.e increasing or reducing the composite beam span or the spacing between parallel beams - that the value is greater than the code requirement. When this occurs the validation warning is provided to you as shown in the first screenshot
Requires Tekla Maintenance
by Tekla Structural Designer Development Team
0
  • Validation-Model-General
  • validation
  • warning
  • Effective width is greater than automatically calculated value

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