v6.02.143 SSNL143 — Validation of the relaxation law for pre-stressed steel cables

Summary:

The objective of this test is to validate the law of relaxation behavior of steel cables used in pre-stressed concrete. The validation is carried out against the expressions from BPEL. Three models are carried out:

• 1. Simulation of cable relaxation (class 1, \(k1=6.0E-03\), \(k2=1.10\)) (class 1,,), over a period of 4000 hours, with \(\mathrm{\mu }=0.75\).

• 2. Simulation of cable relaxation (class 2, \(k1=8.0E-03\), \(k2=1.25\)), over a period of 4000 hours, with \(\mathrm{\mu }=0.75\).

• 3. Simulation of a relaxation with variable deformation of a cable over a period of 6 years. Over the range [0,1an] imposed deformation \({\mathrm{\epsilon }}_{0}\) corresponding to \(\mathrm{\mu }=0.75\), over the range] 1 year, 3 years] imposed deformation of \(1.025\ast {\mathrm{\epsilon }}_{0}\), over the range] 3 years, 6 years] imposed deformation of \(1.050\ast {\mathrm{\epsilon }}_{0}\).

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Boundary conditions and loads
  • 1.4. Initial conditions
• 2. Benchmark solution
  • 2.1. Calculation method
  • 2.2. Reference quantities and results
  • 2.3. Uncertainty about the solution
  • 2.4. Bibliographical references
• 3. Modeling A
  • 3.1. Characteristics of modeling
  • 3.2. Characteristics of the mesh
  • 3.3. Tested sizes and results
• 4. B modeling
  • 4.1. Characteristics of modeling
  • 4.2. Characteristics of the mesh
  • 4.3. Tested sizes and results
• 5. C modeling
  • 5.1. Characteristics of modeling
  • 5.2. Characteristics of the mesh
  • 5.3. Tested sizes and results
• 6. Summary of results