Advances in Computational Design

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Computational methodology to determine the strength of reinforced concrete joint

  • Sasmal, Saptarshi (Academy of Scientific and Innovative Research) ;
  • Vishnu Pradeesh, L. (Academy of Scientific and Innovative Research) ;
  • Devi, A. Kanchana (Academy of Scientific and Innovative Research) ;
  • Ramanjaneyulu, K. (Academy of Scientific and Innovative Research)
  • Received : 2015.08.07
  • Accepted : 2015.12.18
  • Published : 2016.01.25
⟨ Previous Next ⟩

Abstract

Seismic performance of structures depends on the force flow mechanism inside the structure. Discontinuity regions, like beam-column joints, are often affected during earthquake event due to the complex and discontinuous load paths. The evaluation of shear strength and identification of failure mode of the joint region are helpful to (i) define the strength hierarchy of the beam-column sub-assemblage, (ii) quantify the influence of different parameters on the behaviour of beam-column joint and, (iii) develop suitable and adequate strengthening scheme for the joints, if required, to obtain the desired strength hierarchy. In view of this, it is very important to estimate the joint shear strength and identify the failure modes of the joint region as it is the most critical part in any beam-column sub-assemblage. One of the most effective models is softened strut and tie model which was developed by incorporating force equilibrium, strain compatibility and constitutive laws of cracked reinforced concrete. In this study, softened strut and tie model, which incorporates force equilibrium equations, compatibility conditions and material constitutive relation of the cracked concrete, are used to simulate the shear strength behaviour and to identify failure mechanisms of the beam-column joints. The observations of the present study will be helpful to arrive at the design strategy of the joints to ensure the desired failure mechanism and strength hierarchy to achieve sustainability of structural systems under seismic loading.

Keywords

References

  1. Bakir, P.G. and Boduroglu, H.M. (2002), "A new design equation for predicting the joint shear strength of monotonically loaded exterior beam-column joints", Eng. Struct., 24(8), 1105-1117. https://doi.org/10.1016/S0141-0296(02)00038-X
  2. Blakeley, R.W.G., Megget, L.M. and Priestley, M.J.N. (1975), "Seismic performance of two full size Reinforced concrete beam-column joint units", Bull. NZ. Natl. Soc. Earthq. Eng., 8(1), 38-69.
  3. Collins, M.P., Mitchell, D., Adebar, P. and Vecchio, F.J. (1996), "A general shear design method", ACI Struct. J., 93(1), 36-45.
  4. Fisher, M.J. and Sezen, H. (2011), "Behavior of exterior reinforced concrete beam-column joints including a new reinforcement", Struct. Eng. Mech., 40(6), 867-883. https://doi.org/10.12989/sem.2011.40.6.867
  5. Foster, S.J. and Gilbert, R.I. (1996), "The design of nonflexural members with normal and high-strength concretes", ACI Struct. J., 93(1), 3-10.
  6. Fujii, S. and Morita, S. (1991), "Comparison between interior and exterior R/C beam-column joint behavior", ACI Spec. Publication, 123, 145-165.
  7. Hegger, J., Sherif, A. and Roeser, W. (2003), "Nonseismic design of beam-column joints", ACI Struct. J., 100(5), 654-664.
  8. Hsu T.T.C. and Mo Y.L. (2010), Unified theory of concrete structures, John Wiley and Sons Lts, West Sussex, UK.
  9. Hwang, S.J. and Lee, H.J. (1999), "Analytical model for predicting shear strengths of exterior reinforced concrete beam-column joints for seismic resistance", ACI Struct. J., 96(5), 846-858.
  10. Jennewein, M. and Schafer, K. (1992), "Standardisierte nachweise von haufigen D-Bereichen", Deutscher Ausschuss fuer Stahlbeton, 430.
  11. Lee, D.L., Hanson, R.D. and Wight, J.K. (1977), "RC beam-column joints under large load reversals", J. Struct. Div., 103(12), 2337-2350.
  12. Megget, L.M. (1974), "Cyclic behavior of exterior reinforced concrete beam-column joints", Bull. NZ. Natl. Soc. Earthq. Eng., 7(1), 22-47.
  13. Park, R. and Milburn, J.R. (1983), "Comparison of recent New Zealand and United States seismic design provisions for reinforced concrete beam-column joints and test results from four units designed according to the New Zealand code", Bull. NZ. Natl. Soc. Earthq. Eng., 16(1), 3-24.
  14. Park, S. and Mosalam, K.M. (2012), "Parameters for shear strength prediction of exterior beam-column joints without transverse reinforcement", Eng. Struct., 36, 198-209. https://doi.org/10.1016/j.engstruct.2011.11.017
  15. Paulay, T. and Scarpas, A. (1981), "The behaviour of exterior beam-column joints", Bull. NZ. Natl. Soc. Earthq. Eng., 14(3), 131-144.
  16. Pauletta, M., Luca, D.D. and Russo, G. (2015), "Exterior beam column joints-Shear strength model and design formula", Eng. Struct., 94, 70-81. https://doi.org/10.1016/j.engstruct.2015.03.040
  17. Sarsam, K.F. and Phipps, M.E. (1985), "The shear design of in situ reinforced concrete beam-column joints subjected to monotonic loading", Magaz. Concrete Res., 37(130), 16-24. https://doi.org/10.1680/macr.1985.37.130.16
  18. Sasmal, S., Novak, B., Ramanjaneyulu, K., Srinivas, V., Roehm, C., Lakshmanan, N. and Iyer, N.R. (2011a), "Upgradation of gravity load designed sub-assemblage subjected to seismic type loading", J. Compos. Struct., 93(6), 1561-1573. https://doi.org/10.1016/j.compstruct.2011.01.001
  19. Sasmal, S., Lakshmanan, N., Ramanjaneyulu, K., Iyer, N.R., Novak, B., Srinivas, V., Saravana Kumar, K. and Roehm, C. (2011b), "Development of upgradation schemes for gravity load designed beam-column sub-assemblage under cyclic loading", Constr. Build. Mater., 25(8), 3625-3638. https://doi.org/10.1016/j.conbuildmat.2011.03.058
  20. Saptarshi, Sasmal, Ramanjaneyulu, K., Balthasar, Novak and Lakshmanan, N. (2013), "Analytical and experimental investigations on seismic performance of exterior beam-column sub-assemblages of existing RC framed building", Earthq. Eng. Struct. Dyn., 42(12), 1785-1805. https://doi.org/10.1002/eqe.2298
  21. Saptarshi, Sasmal and Ramanjaneyulu, K. (2012), "Evaluation of strength hierarchy of beam-column joints of existing RC structures under seismic type loading", J. Earthq. Eng., 16(6), 897-915. https://doi.org/10.1080/13632469.2012.679998
  22. Schafer, K. (1996), "Strut-and-tie models for the design of structural concrete", National Cheng Kung University, Department of Civil Engineering.
  23. Scott, R.H., Feltham, I. and Whittle, R.T. (1994), "Reinforced concrete beam-column connections and BS 8110", Struct. Eng., 72(4), 55-60.
  24. Tsonos, A.-D.G. (2014), "A new method for earthquake strengthening of old R/C structures without the use of conventional reinforcement", Struct. Eng. Mech., 52(2), 391-403. https://doi.org/10.12989/sem.2014.52.2.391
  25. Unal, M. and Burak, B. (2012), "Joint shear strength prediction for reinforced concrete beam-to-column connections", Struct. Eng. Mech., 41(3), 421-440. https://doi.org/10.12989/sem.2012.41.3.421
  26. Wong, H.F. and Kuang, J.S. (2014), "Predicting shear strength of RC interior beam-column joints by modified rotating-angle softened-truss model", Comput. Struct., 133, 12-17 https://doi.org/10.1016/j.compstruc.2013.11.008
  27. Vecchio, F.J. and Collins, M.P. (1993), "Compression response of cracked reinforced concrete", J. Struct. Eng., 119(12), 3590-3610. https://doi.org/10.1061/(ASCE)0733-9445(1993)119:12(3590)
  28. Vecchio, C.D., Ludovico, M.D., Prota, A. and Manfredi, G. (2015), "Analytical model and design approach for FRP strengthening of non-conforming RC corner beam-column joints", Eng. Struct., 87, 8-20. https://doi.org/10.1016/j.engstruct.2015.01.013
  29. Vishnu Pradeesh, L. (2014), "Evaluation of joint shear strength of reinforced concrete beam column subassemblages for seismic resistance", Tech Thesis, Academy of Scientific and Innovative Research, Chennai, India.
  30. Vollum, R.L. (1998), "Design and analysis of exterior beam column connections", Ph.D. dissertation, Imperial College of Science Technology and Medicine, University of London, London, UK.
  31. Vollum, R.L. and Newman, J.B. (1999), "Strut and tie models for analysis/design of external beam-column joints", Magaz. Concrete Res., 51(6), 415-425. https://doi.org/10.1680/macr.1999.51.6.415
  32. Wang, G-L., Dai, J.-G. and Teng, J.G. (2012), "Shear strength model for RC beam-column joints under seismic loading", Eng. Struct., 40, 350-360. https://doi.org/10.1016/j.engstruct.2012.02.038
  33. Zhang, L.X.B. and Hsu, T.T. (1998), "Behavior and analysis of 100 MPa concrete membrane elements", J. Struct. Eng., 124(1), 24-34. https://doi.org/10.1061/(ASCE)0733-9445(1998)124:1(24)
  34. Zhou, H. and Zhang, Z. (2012), "Interaction of internal forces of exterior beam-column joints of reinforced concrete frames under seismic action", Struct. Eng. Mech., 44(2), 197-217. https://doi.org/10.12989/sem.2012.44.2.197

Cited by

  1. Numerical Study of RC Beam-Column Joints Using a 4-Node Lattice Element Analysis Method vol.25, pp.3, 2016, https://doi.org/10.1007/s12205-021-0991-z
  2. Experimental study on lateral behavior of post-tensioned precast beam-column joints vol.33, pp.None, 2016, https://doi.org/10.1016/j.istruc.2021.04.095