v6.04.165 FORMA42 - Practical work from the « Civil Engineering » training course: tensioning a prestressed beam with a variable section

Summary:

The purpose of this test \(\mathrm{3D}\) is to implement the two techniques for tensioning pretension cables and to compare the solutions thus obtained.

In modeling \(A\), all cables are energized simultaneously from the start of the calculation by simply using the STAT_NON_LINE operator.

In models \(B\) and \(C\) the idea is to use the CALC_PRECONT operator. In the first case, all the cables are put under tension simultaneously; in the second case, the prestress phasing is modelled.

The objective of the TP is to implement these different strategies and to compare the differences in results obtained in each case.

In all cases, the connection conditions between the cable and the concrete as well as the calculation of the tensions according to BPEL91 are carried out using the DEFI_CABLE_BP operator.

When the TP is carried out in a limited time, it may be wise to start with modeling \(A\), and to only perform models \(B\) and \(C\).

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Boundary conditions and loads
• 2. Modeling A: tension of the beam without taking into account phasing with STAT_NON_LINE
  • 2.1. TP implementation
  • 2.2. Tested sizes and results
• 3. Model B: tension of the beam without taking into account phasing with CALC_PRECONT
  • 3.1. TP implementation
  • 3.2. Tested sizes and results
• 4. Modeling C: modeling of prestress phasing
  • 4.1. TP implementation
  • 4.2. Tested sizes and results
• 5. Summary of results