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Build a design beam with an in situ slab.
Type:
Tutorial
Length:
7 min.
Transcript
00:03
In Structural Bridge Design, once you have defined materials and design sections for your project, you are ready to design beams.
00:13
Beams are crucial components that provide support and transfer loads, ensuring the stability and functionality of a bridge.
00:21
Designing beams requires careful consideration of material properties, design shapes, and definitions,
00:27
as well as integration with other structural elements.
00:31
It is best practice to design beams individually, link the beam data files into a project, and then embed them.
00:40
Once the beams are embedded, you can define beam loads and make any necessary adjustments for that project.
00:47
This workflow allows you to reuse beam files within a project or across multiple projects, ensuring consistency and efficiency.
00:56
In this example, you need to design a 21-meter-long, prestressed Y beam, cast using standard C40/50 concrete and aged four days at transfer.
01:09
Additionally, you need to design a 2-meter-wide in situ concrete slab to be placed after 60 days, constructed using C32/40 concrete.
01:21
Standard pre-stressing, wire strands will be used, each with an area of 150 square millimeters
01:27
and a nominal diameter of 16 millimeters.
01:31
The characteristic strength of the tendon is 1861, and the beam will experience a relaxation loss of 2.5 % after 1000 hours.
01:42
With Structural Bridge Design open to the application Home, select New > Create From Template.
01:49
Then, select your template, such as EU Pretensioned.
01:55
If you receive a Save Changes dialog from previous edits, make the necessary selections.
02:02
In the main menu, select File > Titles.
02:08
In the Titles dialog, type a Beam Title, such as NewPrestressedBeam, and then click OK.
02:15
Now, check the materials that are defined for the template.
02:19
In the Navigation Pane, activate the Materials group.
02:24
In the active group tree list, select each material to confirm that it is correct and required for your structure.
02:32
In this example, right-click the Structural Steel material and select Delete, as it is not needed.
02:38
Then, select the Prestressed Steel material, and in the form, adjust the Characteristic Tensile Strength to 1861.
02:50
Here, the Relaxation Class is set to 2, and the Relaxation Loss After 1000 Hours is set to 2.5%,
02:58
which matches the beam parameters previously reviewed.
03:02
Leave these values as shown and click OK.
03:07
Next, you can begin to design the geometry of the beam.
03:11
Select the Design Beam group, and in the tree, select Beam Definition.
03:17
In the Beam Definition form, set the Beam Length to 21, keep the Cross section as uniform, and the Location as Interior beam.
03:28
Next, set the Suggest size of drop-down to Y Beam.
03:32
The suggested sizing of the beam displays in the Pre-tensioned Beam Initial Sizing form.
03:39
Here, adjust the Beams at value to 2000 centres.
03:45
The calculations update.
03:48
Click OK, and the graphics window displays a preview of the beam.
03:54
In the Graphics Toolbar, you can adjust your view of the beam by clicking South,
03:59
or adjust to an isometric view by clicking either South East, or South West.
04:06
Alternatively, Zoom In or Out of the view, or use Pan View to rotate the structure to view it from any direction or angle.
04:17
Next, define the slab.
04:19
Open the Pre-tensioned Beam Definition form again, and for Define, select Section to define the section first.
04:26
The Define Beam Component section preview displays, and the form updates to the Pre-tensioned Beam Section Definition form.
04:35
To add the slab that will go on top, click in the second row of the table, Component column, and select In situ – regular.
04:45
The slab now appears in the preview, but some changes need to be made.
04:50
In the Define Precast Beam Component form, you have the option to update the Shape, but in this case, keep Rectangle.
04:59
Then, update the Dimensions.
05:01
Here, set the Width to 2000 and the Depth to 200.
05:06
Click OK, and the preview updates.
05:10
Now, back in the Pre-tensioned Beam Section Definition form, confirm the in-situ slab Z offset and the Precast Age for the beam and the slab.
05:20
In this case, they are correct and match the initial parameters you reviewed previously.
05:27
With the Z offset for the slab selected, click Merge by stage #.
05:33
Notice that the structures merge in the preview, and that there is no longer an overlap.
05:38
Click OK, and the graphic updates.
05:41
Once again, click the View options to adjust your view as needed.
05:47
Additionally, expand the General tab, and you can update the position of the Global Axes Icon to, for example, bottom left.
05:57
You can also choose to Colour by section or component, and change the Outline Style to blended colour or solid black.
06:06
Additionally, you can enable Transparent Beam and use the slider to adjust the transparency of the beam.
06:13
Click OK to close the form.
06:16
To save the beam, select File > Save As.
06:21
In the Save File dialog, type a File name, such as NewPrestressedBeam, and then click Save.
06:29
In the Beam Overview dialog, click Done.
06:34
Now, you are ready to create your next beam, or to link and embed your beam into a project file.
Video transcript
00:03
In Structural Bridge Design, once you have defined materials and design sections for your project, you are ready to design beams.
00:13
Beams are crucial components that provide support and transfer loads, ensuring the stability and functionality of a bridge.
00:21
Designing beams requires careful consideration of material properties, design shapes, and definitions,
00:27
as well as integration with other structural elements.
00:31
It is best practice to design beams individually, link the beam data files into a project, and then embed them.
00:40
Once the beams are embedded, you can define beam loads and make any necessary adjustments for that project.
00:47
This workflow allows you to reuse beam files within a project or across multiple projects, ensuring consistency and efficiency.
00:56
In this example, you need to design a 21-meter-long, prestressed Y beam, cast using standard C40/50 concrete and aged four days at transfer.
01:09
Additionally, you need to design a 2-meter-wide in situ concrete slab to be placed after 60 days, constructed using C32/40 concrete.
01:21
Standard pre-stressing, wire strands will be used, each with an area of 150 square millimeters
01:27
and a nominal diameter of 16 millimeters.
01:31
The characteristic strength of the tendon is 1861, and the beam will experience a relaxation loss of 2.5 % after 1000 hours.
01:42
With Structural Bridge Design open to the application Home, select New > Create From Template.
01:49
Then, select your template, such as EU Pretensioned.
01:55
If you receive a Save Changes dialog from previous edits, make the necessary selections.
02:02
In the main menu, select File > Titles.
02:08
In the Titles dialog, type a Beam Title, such as NewPrestressedBeam, and then click OK.
02:15
Now, check the materials that are defined for the template.
02:19
In the Navigation Pane, activate the Materials group.
02:24
In the active group tree list, select each material to confirm that it is correct and required for your structure.
02:32
In this example, right-click the Structural Steel material and select Delete, as it is not needed.
02:38
Then, select the Prestressed Steel material, and in the form, adjust the Characteristic Tensile Strength to 1861.
02:50
Here, the Relaxation Class is set to 2, and the Relaxation Loss After 1000 Hours is set to 2.5%,
02:58
which matches the beam parameters previously reviewed.
03:02
Leave these values as shown and click OK.
03:07
Next, you can begin to design the geometry of the beam.
03:11
Select the Design Beam group, and in the tree, select Beam Definition.
03:17
In the Beam Definition form, set the Beam Length to 21, keep the Cross section as uniform, and the Location as Interior beam.
03:28
Next, set the Suggest size of drop-down to Y Beam.
03:32
The suggested sizing of the beam displays in the Pre-tensioned Beam Initial Sizing form.
03:39
Here, adjust the Beams at value to 2000 centres.
03:45
The calculations update.
03:48
Click OK, and the graphics window displays a preview of the beam.
03:54
In the Graphics Toolbar, you can adjust your view of the beam by clicking South,
03:59
or adjust to an isometric view by clicking either South East, or South West.
04:06
Alternatively, Zoom In or Out of the view, or use Pan View to rotate the structure to view it from any direction or angle.
04:17
Next, define the slab.
04:19
Open the Pre-tensioned Beam Definition form again, and for Define, select Section to define the section first.
04:26
The Define Beam Component section preview displays, and the form updates to the Pre-tensioned Beam Section Definition form.
04:35
To add the slab that will go on top, click in the second row of the table, Component column, and select In situ – regular.
04:45
The slab now appears in the preview, but some changes need to be made.
04:50
In the Define Precast Beam Component form, you have the option to update the Shape, but in this case, keep Rectangle.
04:59
Then, update the Dimensions.
05:01
Here, set the Width to 2000 and the Depth to 200.
05:06
Click OK, and the preview updates.
05:10
Now, back in the Pre-tensioned Beam Section Definition form, confirm the in-situ slab Z offset and the Precast Age for the beam and the slab.
05:20
In this case, they are correct and match the initial parameters you reviewed previously.
05:27
With the Z offset for the slab selected, click Merge by stage #.
05:33
Notice that the structures merge in the preview, and that there is no longer an overlap.
05:38
Click OK, and the graphic updates.
05:41
Once again, click the View options to adjust your view as needed.
05:47
Additionally, expand the General tab, and you can update the position of the Global Axes Icon to, for example, bottom left.
05:57
You can also choose to Colour by section or component, and change the Outline Style to blended colour or solid black.
06:06
Additionally, you can enable Transparent Beam and use the slider to adjust the transparency of the beam.
06:13
Click OK to close the form.
06:16
To save the beam, select File > Save As.
06:21
In the Save File dialog, type a File name, such as NewPrestressedBeam, and then click Save.
06:29
In the Beam Overview dialog, click Done.
06:34
Now, you are ready to create your next beam, or to link and embed your beam into a project file.
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