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0045-A-Redistribution of forces by creep effects

The example was created by

Dr.-Ing. Casimir Katz

and published on 28.08.2025 on

published. You can find it at https://evadat.com/de/bsp/0045/.

Currently it is being edited.

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Developed by Dr.-Ing. Casimir Katz
Published on: 28.08.2025 | Qualified on: -
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A0Classification
  • ClassA · Analytical verification example
  • Structural system typeBar structure (general)
  • MechanicsStatics
  • Material lawElastic
  • MaterialConcrete/reinforced concrete/prestressed concrete
  • Verification formatDetermination of internal forces
A1Problem description
Original version

A two-span beam with uniform loading is considered:

Kraftumleitung.jpg

The beam has been erected as two single span beams with the same loading. So, there is a maximum moment of 1500 kNm in every span and the hogging moment is zero.

Then the hinge at the central support of the beam will be closed and the continuous beam with that same permanent loading is subject to creep. However, as there was a significant delay in the construction, the creep factor of the left beam is 2.0 and of the right beam 2.5.

The bending moment will now change due to this effect.

Section and material may be selected freely, a rectangular section 1500 mm height and 4000 mm wide my be selected.

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A5References

Additional literature

  • Trost, H.: Implications of the Superposition Principle in Creep and Relaxation Problems for Concrete and Prestressed Concrete. In: Beton- und Stahlbetonbau 10, 1967.
  • Trost, H.: On Realistic Determination of Stresses in Prestressed Concrete Structures Built by Segments. In: Der Bauingenieur 45, 1970.
  • Bažant, Z.: Prediction of Concrete Creep Effects Using Age-Adjusted Effective Modulus Method. In: Journal of the American Concrete Institut 69, 1972.
Editors
Dr.-Ing. Casimir Katz SOFiSTiK AG (Garching, Germany)
–
Creator
Dr.-Ing. Casimir Katz SOFiSTiK AG (Garching, Germany)
SOFiSTiK FEA (2025) SOFiSTiK AG
Editor 1
Dr.-Ing. Casimir Katz Creator, Editor 1

SOFiSTiK AG (Garching, Germany)

Software used: SOFiSTiK FEA (2025) SOFiSTiK AG