Preliminary Investigation on Steel Jacketing Retrofitting of Concrete Bridges Half-Joints
Source abstract
Abstract
An innovative strengthening system for dapped-end beams is studied numerically and experimentally in this paper. The system is developed for the half-joint regions of bridge beams also commonly called “gerber saddles”, but it can be adapted to different scenarios. The strengthening system consists of two steel plates that are clamped on both sides of the webs of the beams by means of bolts. The purpose of the system is to transfer the highest possible amount of shear from the concrete webs to the steel plate elements reducing the resistance demand of the concrete half joint. Shear is transferred by friction from concrete to steel plates. The system is designed to be applied on existing bridges without heavy work interesting the carriageway, therefore reducing the interference with the traffic. Some interesting considerations emerge from the study, including the influence of the flange web connection on the structural behavior and the possible presence of brittle failure mechanisms that are difficult to model numerically using f.e.m. simulations.
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Research context
OpenAlex topics: Structural Behavior of Reinforced Concrete · Structural Load-Bearing Analysis · Railway Engineering and Dynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Structural, Geotechnical and Building Engineering (DISEG), Politecnico di Torino, 10129 Turin, Italy
Movyon, Autostrade per l’Italia S.p.A., 50013 Limite, Italy
Funding
Elis Innovation Hub
References (43)
Show source-provided references
1. Condition, safety and cost profiles for deteriorating structures with emphasis on bridges10.1016/j.ress.2004.08.018 ↗
2. Ministero delle Infrastrutture e della Mobilità Sostenibili (2022). Linee Guida per la Classificazione e Gestione del Rischio, la Valutazione Della Sicurezza ed il Monitoraggio dei Ponti Esistenti, Ministero delle Infrastrutture e della Mobilità Sostenibili. Decreto 01-07-2022.
3. Assessment of existing reinforced-concrete bridges under road-traffic loads according to the new Italian guidelines10.1002/suco.202100147 ↗
4. Fragility analysis of existing prestressed concrete bridges under traffic loads according to new Italian guidelines10.1002/suco.202200158 ↗
5. Cosenza, E., and Losanno, D. (2020, January 1–4). A focus on the new Italian guidelines for safety assessment of existing bridges (Key-note lecture). Proceedings of the 2nd Workshop on Capacity Assessment of Corroded Reinforced Concrete Structures, CACRCS DAYS 2020, online.
6. Lee, D.J. (1995). Bridge Bearings and Expansion Joints, CRC Press. [2nd ed.].10.1201/9781482266993 ↗
7. Di Prisco, M., Colombo, M., Martinelli, P., and Coronelli, D. (2018, January 13–16). The technical causes of the collapse of Annone overpass on SS.36. Proceedings of the Italian Concrete Days Aicap and CTE, Milan/Lecco, Italy.
8. Load-bearing capacity of Gerber saddles in existing bridge girders by different levels of numerical analysis10.1002/suco.202200279 ↗
9. Experimental evaluation of the corrosion influence on the structural response of Gerber half-joints10.1016/j.engstruct.2023.116052 ↗
10. Durability enhancement of half-joints in RC bridges through external prestressed tendons: The Musmeci Bridge’s case study
11. Assessment and strengthening of reinforced concrete bridges with half-joint deterioration10.1002/suco.202200367 ↗
12. Dapped-End Strengthening of Full-Scale Prestressed Double Tee Beam with FRP Composite10.1260/136943306776987010 ↗
13. Strengthening o critically designed girders with dapped ends10.1680/stbu.2005.158.2.141 ↗
14. Innovative method for strengthening dapped-end beams using an external prestressing technique10.1617/s11527-015-0701-8 ↗
15. Design and Behavior of Dapped-End Beams10.15554/pcij.11011979.28.45 ↗
16. Design proposal for reinforced concrete corbels10.15554/pcij.05011976.18.42 ↗
17. Liem, S.K. (1983). Maximum Shear Strength of Dapped-End or Corbel. [Master’s Thesis, Concordia University].
18. Barton, D.L., Anderson, R.B., Bouardi, A., Jirsa, J.O., and Breen, J.E. (1991). An Investigation of Strut-and-Tie Models for Dapped Beam Details, Texas State Department of Highways and Public Transportation. Research Report Number 1127-1.
19. Strut-and-tie models for deteriorated reinforced concrete half-joints10.1016/j.engstruct.2018.01.013 ↗
20. Proposal and experimental validation of simplified strut-and-tie models on dapped-end beams10.1016/j.engstruct.2019.01.010 ↗
21. Impact of the reinforcement layout on the load capacity of reinforced concrete half-joints10.1016/j.engstruct.2016.08.061 ↗
22. The effect of local reinforcing bar reductions and anchorage zone cracking on the load capacity of RC half-joints10.1016/j.engstruct.2017.09.021 ↗
23. Aswin, M., Al-Fakih, A., Syed, Z.I., and Liew, M.S. (2023). Influence of Different Dapped-End Reinforcement Configurations on Structural Behavior of RC Dapped-End Beam. Buildings, 13.10.3390/buildings13010116 ↗
24. Experimental and numerical assessment of the effectiveness of FRP-based strengthening configurations for dapped-end RC beams10.1016/j.engstruct.2012.06.006 ↗
25. Behavior of disturbed region of RC precast beams upgraded with near surface mounted CFRP fiber10.1007/s42107-023-00605-5 ↗
26. Numerical optimization of strengthening disturbed regions of dapped-end beams using NSM and EBR CFRP10.1016/j.compositesb.2014.07.013 ↗
27. Numerical Investigation for external Strengthening of Dapped-End Beams
28. Improving the shear behavior of RC dapped-end beams using precast strain-hardening cementitious composite (P-SHCC) plates10.1016/j.istruc.2023.02.059 ↗
29. Strengthening of RC dapped-end beams under torsional moment10.1680/macr.14.00067 ↗
30. (2004). Eurocode 2: Design of Concrete Structures (Standard No. EN 1992-1-1).
31. Reinforced Concrete Members Subjected to Cyclic Tension and Corrosion10.3151/jact.9.277 ↗
32. Biondini, F., and Frangopol, D.M. (2023). Life-Cycle of Structures and Infrastructure Systems, Proceedings of the IALCCE 2023 Eight International Symposium on Life-Cycle Civil Engineering, Milan, Italy, 6 July 2023, Amer Society of Civil Engineers.10.1201/9781003323020 ↗
33. (2005). Eurocode 3: Design of Steel Structures—Design of Joints (Standard No. EN1993-1-8).
34. (2016). Theory Manual of DIANA FEA, DIANA FEA BV. Release 10.2.
35. (2016). Element Library of DIANA FEA, DIANA FEA BV. Release 10.2.
36. Smeared crack approach: Back to the original track10.1002/nag.518 ↗
37. The modified compression field theory for reinforced concrete elements subjected to shear
38. Selby, R.G., and Vecchio, F.J. (1993). Three-Dimensional Constitutive Relations for Reinforced Concrete, University of Toronto, Department of Civil Engineering.
39. Compression response of cracked reinforced concrete10.1061/(ASCE)0733-9445(1993)119:12(3590) ↗
40. A constitutive model for analysis of reinforced concrete solids10.1139/l96-135 ↗
41. (2017). Material Library of DIANA FEA, DIANA FEA BV. Release 10.2.
42. Belletti, B., Damoni, C., and Hendriks, M. (2013). Assessment, Upgrading and Refurbishment of Infrastructures, Proceedings of the IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6–8 May 2013, IABSE.
43. Partial safety factor for resistance model uncertainties in 2D non-linear finite element analysis of reinforced concrete structures10.1016/j.engstruct.2018.09.041 ↗