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Percent Loss(%): Set the percent loss for the long-term losses. This is an optional input. Users can leave this input as 0 and let OpenBrIM calculate the long-term losses using the CEB-FIB 1990 curve by running the time-dependent analysis. Alternatively, users can set an approximate value for the Percent Loss (%) to account for long-term losses, which will reduce the Jacking Force values of the tendon.

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There are two methods for calculating tendon losses in OpenBrIM. The first method, the approximate method, involves defining the Percent Loss (%) of the tendon objects on the FEA tab, as outlined above.

The second method, the detailed method, is as follows:

  1. Defining Time-Dependent Material Properties for tendon materials:
    Refer to this link for parameters such as:

    • Steel Relaxation Effect

    • PT Losses from Structure

  2. Defining CEB-FIB 1990 Parameters of the materials:
    Refer to this link for defining parameters such as:

    • Steel Relaxation Class

  3. Making Construction Stage Definitions:
    Refer to this link for making stage definitions by:

    • Construction Day

    • Code

    • Steel Relaxation Effect

    • PT Losses from Structure

  4. Defining the Associated Result Extraction Cases: refer to screenshot below for example case definitions.

image-20241218-130057.pngImage Added