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Debond reinforcement strands

Added August 31, 2016 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 

Debond reinforcement strands

Debond reinforcement strands

  1. On the Concrete tab, hold down Shift and click Rebar > Strand pattern.

    The Strand Pattern Properties dialog box opens.

  2. On the Debonding tab, click the Add button to create a new row in the table.
  3. Enter the strandreinforcement that represents a group of wires spun together

    numbers in the Debonded strands field.

    The strand number is the selection order number of the strand.

    • To set the same values for all the strands, enter all the strand numbers, separated by a space. For example, 1 2 3 4.

    • To set separate values for each strand, click Add to add a new row, then enter the strand number in the Debonded strands field.

  4. Define the debonded lengths.

    To set symmetrical lengths, select the End lengths = start lengths check box and only enter values in the From start or Middle to start fields.

  5. Click Modify.

    Tekla Structures displays the debonded section of the strand in red.

Reinforcement strand properties

Use the Strand Pattern Properties dialog box to view and modify the properties of strands. The file name extension of the properties file is .rbs.

Option Description
Strand prefix and start number Mark series of the bar.

User-definable name of the strand.

Tekla Structures uses bar names in reports and drawing lists, and to identify strands of the same type.


Diameter of the bar.

Depending on the environment, the nominal diameter of the bar, or a mark that defines the diameter.

Grade Steel grade of the bar.
Bending radius

Internal radius of the bends in the bar.

You can enter a separate value for each bar bend. Separate the values with spaces.


Used to group reinforcement.

For example, you can display strands of different classes in different colors.

Pull per strand Pre-stress load per strand (kN).
Number of cross sections

Number of cross sections of the strand pattern.

  • Number of profiles 1 = strand profile
  • Number of profiles 2 = strand profile
  • Number of profiles 3 = strand profile
  • Number of profiles 4 = strand profile

User-defined attributes

You can create user-defined attributes to add information about reinforcement. Attributes can consist of numbers, text, or lists.

You can use the values of user-defined attributes in reports and drawings.

To create user-defined attributes, click the User-defined attributes button in the reinforcement properties dialog box.

You can also change the name of the fields, and add new ones, by editing the objects.inp file. See User-defined attributes (UDAs) in the objects.inp file.

Option Description
Debonded strands Enter the strand number. The strand number is the selection order number of the strand.

From start

Middle to start

Middle to end

From end

Enter the length of the debonding.

If you select the Symmetry check box, values from From start and From Middle to start are copied to From end and Middle to end.

Symmetry Define whether the end and start lengths are symmetrical.

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