Structural Engineering and Mechanics

  • 제71권3호
  • /
  • Pages.233-244
  • /
  • 2019
  • /
  • 1225-4568(pISSN)
  • /
  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

An interface model for the analysis of the compressive behaviour of RC columns strengthened by steel jackets

  • 투고 : 2018.09.30
  • 심사 : 2019.04.01
  • 발행 : 2019.08.10
⟨ 이전 논문 다음 논문 ⟩

초록

Steel jacketing technique is a retrofitting method often employed for static and seismic strengthening of existing reinforced concrete columns. When no continuity is given to angle chords as they cross the floor, the jacket is considered "indirectly loaded", which means that the load acting on the column is transferred partially to the external jacket through interface shear stresses. The evaluation of load transfer mechanism between core and jacket is not straightforward to be modeled, due to the absence of knowledge of a proper constitutive law of the concrete-to-steel interface and to the difficulties in taking into account the mechanical nonlinearities of materials. This paper presents an incremental analytical/numerical approach for evaluating the compressive response of RC columns strengthened with indirectly loaded jackets. The approach allows calculating shear stresses at the interface between core and jacket and predicting the axial capacity of retrofitted columns. A proper constitutive law is proposed for modelling the interaction between the steel and the concrete. Based on plasticity rules and the non-linear behaviour of materials, the column is divided into portions. After a detailed parametric analysis, comparisons are finally made by theoretical predictions and experimental results available in the literature, showing a good agreement.

키워드

참고문헌

  1. Achillopoulou, D.V. (2017), "Investigation of load transfer along interfaces of jacketed square columns", Struct. Eng. Mech., 63(3), 293-302. https://doi.org/10.12989/sem.2017.63.3.293.
  2. Ahmedt, M., Oehlers, D.J. and Bradford, M.A. (2000), "Retrofitting reinforced concrete beams by bolting steel plates to their sides. Part 1. Behaviour and experiments", Struct. Eng. Mech., 10(3), 211-226. https://doi.org/10.12989/sem.2000.10.3.211
  3. Adam, J.M., Ivorra, S., Pallares, F.J., Gimenez, E. and Calderon, P. A. (2009), "Axially loaded RC columns strengthened by steel caging. Finite element modelling", Construct. Build. Mater., 23(6), 2265-2276. https://doi.org/10.1016/j.conbuildmat.2008.11.014.
  4. Alfano, G. and Sacco, E. (2006), "Combining interface damage and friction in a cohesive-zone model", J. Numeric. Methods. Eng., 68, 542-582. https://doi.org/10.1002/nme.1728.
  5. Badalamenti, V., Campione, G. and Mangiavillano, M.L. (2010), "Simplified model for compressive behaviour of concrete columns strengthened with steel angles and strips", J. Eng. Mech., 136(2). https://doi.10.1061/(ASCE)EM.1943-7889.0000069, 230-238.
  6. Belal, M.F., Mohamed, H.M. and Morad, S.A. (2015), "Behavior of reinforced concrete columns strengthened by steel jacket", HBRC J., 11(2),201-212. https://doi.org/10.1016/j.hbrcj.2014.05.002.
  7. Campione, G., Cavaleri, L., Di Trapani, F. and Ferrotto, M.F. (2017), "Frictional effects in structural behavior of no-endconnected steel-jacketed RC columns: experimental results and new approaches to model numerical and analytical response", J. Struct. Eng., 143(8). https://doi.org/10.1061/(ASCE)ST.1943-541X.0001796.
  8. CEN (European Committee for Standardization) (2005a), "Design of composite steel and concrete structures. Part 1: General rules for buildings", Eurocode 4, Brussels, Belgium.
  9. CEN (European Committee for Standardization) (2005b), "Design of structures for earthquake resistance. Part 1: General rules, seismic actions and rules for buildings", Eurocode 4, Brussels, Belgium.
  10. Chen, J.F. and Teng, J.G. (2001), "Anchorage strength models for FRP and steel plates bonded to concrete", J. Struct. Eng., 127(7), 784-791. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:7(784).
  11. Cottone, A. and Giambanco, G. (2009), "Minimum bond length and size effects in FRP-substrate bonded joints", Eng. Fracture Mech., 76(13), 1957-1976. https://doi.org/10.1016/j.engfracmech.2009.05.007.
  12. Di Ludovico, M., Balsamo, A., Prota, A. and Manfredi, G. (2008), "Comparative assessment of seismic rehabilitation techniques on a full scale 3-story RC moment frame structure", Struct. Eng. Mech., 28(6), 727-747. https://doi.org/10.12989/sem.2008.28.6.727.
  13. Gimenez, E., Adam, J.M., Ivorra, S., Moragues, J.J. and Calderon, P.A. (2009), "Full-scale testing of axially loaded RC columns strengthened by steel angles and strips", Adv. Struct. Eng., 12(2), 169-181. https://doi.org/10.1260%2F136943309788251704. https://doi.org/10.1260/136943309788251704
  14. Goel, S. and Patra, N.R. (2007), "Prediction of load displacement response of single piles under uplift load", Geotech. Geol. Eng., 25, 57. https://doi.org/10.1007/s10706-006-0006-3.
  15. Mander, J.B., Priestley, M.J.N. and Park, R. (1988), "Theoretical stress-strain model for confined concrete", ASCE J. Struct. Eng., 114(8), 1804-1826. https://doi.org/10.1061/(ASCE)0733-9445(1988)114:8(1804).
  16. Montuori, R. and Piluso, V. (2009), "Reinforced concrete columns strengthened with angles and battens subjected to eccentric load", Eng. Struct., 31(2), 539-550. https://doi.org/10.1016/j.engstruct.2008.10.005.
  17. Nagaprasad, P., Sahoo, D.R. and Rai, D.C. (2009), "Seismic strengthening of R.C. columns using external steel cage", Earthq. Eng. Struct. Dyn., 38(14), 1563-1586. https://doi.org/10.1002/eqe.917.
  18. Oehlers, D.J., Nguyen, N.T. and Bradford, M.A. (2000), "Retroffitting by adhesive bonding steel plates to the sides of RC beams. Part 1: Debonding of plates due to flexure", Struct. Eng. Mech., 9(5), 491-504. https://doi.org/10.12989/sem.2000.9.5.491.
  19. Tarabia, A.M. and Albakry, H.F. (2014), "Strengthening of RC columns by steel angles and strips", Alexandria Eng. J., 53(3), 615-626. https://doi.org/10.1016/j.aej.2014.04.005.
  20. Thermou, G.E., and Elnashai, A.S. (2006), "Seismic retrofit schemes for RC structures and local-global consequences", Prog. Struct. Engng. Mater., 8(1), 1-15. https://doi.org/10.1002/pse.208.
  21. Vandoros, K.G. and Dritsos, S.E. (2006), "Interface treatment in shotcrete jacketing of reinforced concrete columns to improve seismic performance", Struct. Eng. Mech., 23(1), 43-61. https://doi.org/10.12989/sem.2006.23.1.043.
  22. Yuce, S.Z., Yuksel, E., Bingol, Y., Taskin, K. and Faruk Karadogan, H. (2007), "Local thin jacketing for the retrofitting of reinforced concrete columns", Struct. Eng. Mech., 27(5), 589-607. https://doi.org/10.12989/sem.2007.27.5.589.

피인용 문헌

  1. An Enhanced UHPC-Grout Shear Connection for Steel-Concrete Composite Bridges with Precast Decks vol.2021, 2019, https://doi.org/10.1155/2021/5595174