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Reinforced Concrete Sections

Here we'll explore the Concrete Designer dialog. We'll first quickly set up the basics of the model, then specify the reinforced concrete section.

1.0 Setting up the initial model

  1. In the Project Settings make sure the Pile Analysis Type is set to Laterally Loaded.
  2. Go to Analysis > Units and set the units to Imperial.
  3. In the Soil Properties dialog (Soils > Soil Properties), define the following:
  4. #

    Name

    Colour

    Soil Type

    Unit Weight (lbs/ft3)

    Strain Factor

    Undrained Shear Strength (psf)

    1

    Clay

    Yellow Square

    Soft Clay Soil

    96

    0.02

    32

  5. In the Edit Boreholes dialog (Soils > Borehole Editor), define the following soil profile. We are using only a single borehole for this example.

#

Name

Thickness

Top Elevation

Bottom Elevation

1

Clay

55

0

-55

2.0 Defining the pile material properties and reinforced concrete section

Open the Define Pile Section Properties dialog by selecting Piles > Pile Section Properties. Here we'll define a circular reinforced concrete section.

From the Cross Section dropdown, select Circle. Set the Diameter to 3.42 ft.

From the Type dropdown, select Reinforced Concrete. Note that the Design button is now available. For Pile Material Properties, set the Compressive Strength to 34,000 psf.

Pile properties dialog

Reinforced Concrete Section

Click on the Design button beside the Type dropdown. The Concrete Designer has three tabs, allowing users to fully define a reinforced concrete section. For more detailed information, we have the following help topics:

Reinforced Concrete

Reinforcement Pattern Type

Casing/Core

I-Beam

Prestressed Concrete

By default, the concrete section is not reinforced. To add a reinforcement pattern, click on the green plus icon. In the Reinforcement tab, define the following pattern:

  • Rebar Size = US Std. #9
  • Pattern type = Radial
  • Number of Bars = 14
  • Angle from X Axis = 0
  • Distance from Center (in) = 13

Reinforcement tab of the Concrete Designer

Reinforcement tab of the Concrete Designer

We will now add a casing in the Casing/Core tab. This tab allows the user to add a casing / core and to specify the necessary parameters. For this tutorial, check the Casing box and enter the below properties:

  • Casing Thickness (in) = 0.5
  • Yield Stress of Casing (psf) = 420,000
  • Elastic Modulus of Casing (psf) = 200,000,000

Casing / Core tab of the Concrete Designer

Casing / Core tab of the Concrete Designer

Finally, we'll add an I-beam to the center of the pile using the I-beam tab. Define the I-beam as shown in the figure below:

  • Type = American Steel
  • W 12x72

I-beam tab of the Concrete Designer

I-beam tab of the Concrete Designer

Click OK to close the dialog and save your changes. Click OK to exit the Define Pile Properties dialog and save your changes.

3.0 Defining the pile properties and loading

We can now specify the pile loading.

  1. Select Piles > Add Pile to open the Add Single Pile dialog.
  2. Add Single Pile dialog

  3. In the Geometry tab, click on the Edit icon Edit icon for Pile Type 1 and specify a Length of 50 ft.
  4. Click OK to return to the Geometry tab. Leave everything else as the default values.
  5. Add Single Pile - Loading tab

  6. In the Loading tab, add only a Moment Y of 50,000 lb-ft.
  7. Click OK to exit the dialog and save your changes.
  8. You'll now be prompted to place the pile. Enter 0,0 in the command prompt in the bottom right of the screen and then press Enter.
  9. You have now defined a reinforced concrete pile.

    Model

  10. Compute icon Save and Compute to see the results.

Model


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