Institute Giprostroymost (Bridges Department)
Russian Federation
Russian Federation
To evaluate the impact of long-term deformations caused by concrete creep and shrinkage on the stress-strain state of the rigid column-superstructure joint in a frame bridge. To verify the applicability of modern creep and shrinkage models for this type of structure. Methods: The numerical modelling was performed using the Finite Element Method (FEM) in the Midas Civil software. Nonlinear long-term eff of concrete creep and shrinkage, as well as prestress losses in the reinforcement, were considered. Results: It was established that concrete shrinkage exerts the most signifi infl on longitudinal deformations and on forces in the joints during the early service stage. Concrete creep partially compensates for the stresses induced by shrinkage. The most signifi changes in forces occur within the fi year of service; thereafter, the rate of change decreases substantially. The research results have confi the necessity of accurately accounting for long-term deformations in design. Practical signifi The presented results will enable a more accurate prediction of the rigid column-superstructure joint behavior in frame bridges, thereby reducing the risk of crack formation and elevated residual stresses. This will contribute to enhanced reliability and durability of bridge structures.
Prestressed concrete, bridge, prediction of long-term concrete deformations, shrinkage, creep, frame bridges
1. ACI Committee 209. Guide for Modeling and Calculating Shrinkage and Creep in Hardened Concrete (ACI 209.2R-08) / ACI Committee 209. — Farmington Hills, MI: American Concrete Institute, 2008. — Pp. 249–260.
2. AASHTO LRFD Bridge Design Specifications: 5th edition / American Association of State Highway and Transportation Officials (AASHTO). — Washington, DC: AASHTO, 2010.
3. Kolmogorov A. G. Raschet zhelezobetonnyh konstrukciy po rossiyskim i zarubezhnym normam / A. G. Kolmogorov. — Tomsk: Pechatnaya manufaktura, 2009. — 496 s.
4. SP 35.13330.2011. Mosty i truby. Aktualizirovannaya redakciya SNiP 2.05.03—84. — M.: Standartinform, 2019.
5. Rekomendacii po uchetu polzuchesti i usadki betona pri raschete betonnyh i zhelezobetonnyh konstrukciy / NIIZhB Gosstroya SSSR. — M.: Stroyizdat, 1988.
6. EN 1992-1-1:2004. Eurocode 2: Design of concrete structures / European Committee for Standardization. — Brussels, 2004.
7. Bazant Z. P. Creep and shrinkage prediction model for analysis and design of concrete structures — model B3 / Z. P. Bazant, S. Baweja // Materials and Structures. — 1995. — Vol. 28. — Pp. 357–365. — DOI: 10.1007/ BF02473152.
8. Gilbert R. I. Time effects in concrete structures / R. I. Gilbert. — Amsterdam: Elsevier. Developments in civil engineering. 1988. — Vol. 23. — 321 p.
9. Ghali A. Concrete structures: Stresses and deformations / A. Ghali, R. Favre, M. Elbadry. — 4th ed. — CRC Press, 2012. — DOI:https://doi.org/10.1201/9781003061274.
10. Neville A. M. Creep of plain and structural concrete / A. M. Neville, W. H. Dilger, J. J. Brooks. — Construction Press, 1983.
11. Dilger W. H. Creep analysis of prestressed concrete structures using creep-transformed section properties / W. H. Dilger // PCI Journal. — 1982. — Vol. 27. — Iss. 1. — Pp. 98–118. — DOI:https://doi.org/10.15554/pcij.01011982.98.119.
12. Wendner R. Optimization method, choice of form and uncertainty quantification of Model B4 using laboratory and multi-decade bridge databases / R. Wendner, M. H. Hubler, Z. P. Bažant // Materials and Structures. — 2015. — Vol. 48. — Iss. 4. — Pp. 771–796. — DOI: 10.1617/ s11527-014-0515-0.
