6. Click in the Span field and enter a value of “26m”. Click on the Location is drop down menu and select “Outer beam” from the list.
7. Click on the Define drop down menu and select “Section” from the list to open the Composite Beam Section Definition form. Click in the Component drop down menu on the first row of the table and select “Rolled Steel UB” from the list. This will open the Define Composite Beam Component form. Click on the Serial size within range drop down menu and select “914×419” from the list. Click on the “OK” button to close the Define Composite Beam Component form.
8. Click in the Component drop down menu on the second row of the table and select “Concrete Slab” from the list. This will open the Define Composite Beam Component form. Click in the width field and enter a value of “2000mm”. Click in the depth field and enter a value of “200mm”. Click on the “OK” button to close the Define Composite Beam Component form. Click in the Slab Details X offset field and enter a value of “0.5m”.
Add Haunch and Edge Detail
9. Click in the Component drop down menu on the third row of the table and select “Concrete Haunch” from the list. This will open the Define Composite
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Beam Component form. Click in the width at top field and enter a value of “600mm”. Click in the width at bottom field and enter a value of “420mm”. Click in the depth field and enter a value of “75mm” Click on the “OK” button to close the Define Composite Beam Component form.
10. Click in the Component drop down menu on the fourth row of the table and select “Concrete Edge” from the list. This will open the Define Edge Detail form.
11. Click on the “Retrieve” button and open the supplied file “BS Example 4_1 Edge Details.lib”. There is only one shape in this library file so select it and click on the “OK” button. The edge detail is not located correctly in the section but this can be done by setting the offsets in the Composite Beam Section Definition form.
12. Close the Define Edge Detail form with the “OK” button. 13. Enter an X offset: of “-0.5” and a Y offset: of “0.996”. 14. Uncheck the Edge detail cast with slab? check box.
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15. Ensure that the C40 grade concrete is assigned to three concrete components in the Property column (see above). Click on the “OK” button to close the Composite Beam Section Definition form.
16. Click on the “OK” button to close the Define Composite Beam form. 17. Use the File |Save As... menu item to open the Save File form.
18. Change the filename to “My BS Example 4_1.sam” and click on the “Save” button to save the data file.
19. Close the program. Summary
In this example we have defined a steel composite beam which includes a concrete haunch and a concrete edge detail. The edge detail was imported from a user library file but could easily have been generated by entering the coordinates of the shape vertices directly into the table. Note that the materials for each section component were not explicitly defined but default values were used as these were the correct values. Different materials could have been selected here if they had been previously defined.
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4.2. Steel Composite Beam Definition (Advanced)
Subjects Covered:
Steel composite beam; span type; end span type; slab reinforcement; section locations; soffit profile; construction stages;
Outline
A composite steel girder and concrete slab is shown below.
The beam is a steel plate girder with a nominal yield strength of 355N/mm2. The top and bottom flanges are 500mm wide and 40mm thick. The web is 20mm thick. The overall depth of the girder is 1000mm at the deepest section.
The 200mm thick slab is grade 40 concrete and is 2000mm wide. It is required to create two beams:
1. A 30m internal span which has a curved bottom flange (circular arc) such that the mid-span point is raised by 400mm. The concrete slab is cast in its length in two stages, as shown, and has longitudinal structural reinforcement of 25mm diameter bars at 200mm centres top and bottom. This reinforcement has 50mm cover and is placed in the slab only over the supports, extending 8m into the span from both ends.
2. A 20m end span which has a curved bottom flange (circular arc) such that the simply supported end and a point 7m from this end are raised by 400mm. The concrete slab is cast in its length in two stages, as shown, and has the same reinforcement as the first beam. This reinforcement has 50mm cover and is
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placed in the slab only over the continuous support, extending 6m into the span.
Procedure
1. Start the program and ensure that the current Project Template: is set to “Version 6 Examples” using the Options |Projects Templates menu item. 2. Begin a new section using the menu item File |New Beam.
3. Set the Beam type to “Steel Composite” using the Data |Beam Type menu item.
4. Use the menu item Data |Titles... to set the Beam title as “Composite