Frequently Asked Questions
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Sections Frequently Asked Questions
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| How does Sam calculate the shear width
and depth for a section? |
S001 |
In the calculations for shear resistance in the beams, the width of the section resisting shear will be taken as the width of the section at its centroid, and the effective depth of the section will be taken as the overall depth of the section at its centroid, less the distance to the centre of the outermost tension bar.
For most beams these should provide suitable values. However provision is given to over-ride the program's default values.
| How can I define a composite pile of Dia200mm of concrete with a caisson Dia220mm of steel? |
S002 |
There are two ways you can define the section. The first is with the central concrete core defined as a 200mm diameter circle and the outer steel shell defined as an annulus with a 200mm inner diameter and a 220mm outer diameter.
The second option is to define the central concrete core as a 200mm circle, define the outer steel as a 220mm circle and define a third circle of 200mm diameter using the void property.
In both cases you can use a hook point at position 0 and x and y coordinates of 0 for each of the shapes to get them centred.
| Why does nothing happen when I click on the merge button to merge two components of a section? |
S003 |
Sam is unable to merge two section components where one lies completely within the other or where they have a coincident face.
Use a vertical offset to shift one component upwards by 1mm then repeat the merge process.
| How do I draw a section in CAD to import into Sam? |
S004 |
All of the layers in the DXF or DWG are presented. Shapes may be imported as combinations of LINES, POLYLINES and ARCS. For shapes to be imported they must satisfy the following criteria.
- Must be made entirely of LINES, POLYLINES and ARCS.
- Must be closed.
- Must not have any intersections.
CIRCLES may also be imported as separate entities.
When importing a section via the 'Import File...' menu item, bars and tendons are identified and imported. When importing shapes via the Define Section form, bars and tendons are identified and discarded.
- Bars are identified as circles of less than 100mm.
- Tendons are identified as two intersecting lines in a '+' shape. Both lines must be of a length less than 100mm.
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