Analytical Design of Continuous Prestressed Concrete Beams – Methodology, Example, and Comparison with a Simply Supported Beam
Session
Civil Engineering, Infrastructure and Environment
Description
This paper presents a complete analytical procedure for continuous prestressed concrete beams (two spans 15 + 15 m). The analysis covers moment distribution, loadbalancing method, prestress losses, thrust-line geometry, and shear verification in accordance with Eurocode 2. Continuity reduces positive bending moments in the spans to approximately wL²/24 while introducing negative moments over the internal support of about wL²/12 , compared to wL²/8 for a simply supported beam. An affine correction of the tendon profile allows fine adjustment of the thrust line without altering the equivalent load wₚ. A practical design example and comparison with numerical FEM results are provided.
Keywords:
Prestressed concrete, continuous beam, Hardy-Cross, thrust line, prestress losses, shear, anchorage zone, FEM
Proceedings Editor
Edmond Hajrizi
ISBN
978-9951-982-41-2
Location
UBT Kampus, Lipjan
Start Date
25-10-2025 9:00 AM
End Date
26-10-2025 6:00 PM
DOI
10.33107/ubt-ic.2025.60
Recommended Citation
Mulliqi, Xhemshir, "Analytical Design of Continuous Prestressed Concrete Beams – Methodology, Example, and Comparison with a Simply Supported Beam" (2025). UBT International Conference. 22.
https://knowledgecenter.ubt-uni.net/conference/2025UBTIC/CEIE/22
Analytical Design of Continuous Prestressed Concrete Beams – Methodology, Example, and Comparison with a Simply Supported Beam
UBT Kampus, Lipjan
This paper presents a complete analytical procedure for continuous prestressed concrete beams (two spans 15 + 15 m). The analysis covers moment distribution, loadbalancing method, prestress losses, thrust-line geometry, and shear verification in accordance with Eurocode 2. Continuity reduces positive bending moments in the spans to approximately wL²/24 while introducing negative moments over the internal support of about wL²/12 , compared to wL²/8 for a simply supported beam. An affine correction of the tendon profile allows fine adjustment of the thrust line without altering the equivalent load wₚ. A practical design example and comparison with numerical FEM results are provided.