Structural Engineering and Mechanics

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Seismic performance of RC bridge piers subjected to moderate earthquakes

  • Chung, Young Soo (Department of Civil Engineering, Chung-Ang University) ;
  • Park, Chang Kyu (Department of Civil Engineering, Chung-Ang University) ;
  • Lee, Dae Hyoung (Department of Civil Engineering, Gyeong-Do Provincial College)
  • Received : 2005.09.01
  • Accepted : 2006.06.20
  • Published : 2006.11.10
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Abstract

Experimental investigation was conducted to evaluate the seismic ductility of earthquake-experienced concrete columns with an aspect ratio of 2.5. Eight circular concrete columns with a diameter of 600 mm were constructed with three test parameters: confinement ratio, lap-splice of longitudinal bars, and retrofitting with Fiber Reinforced Polymer (FRP) materials. The objective of this research is to examine the seismic performance of RC bridge piers subjected to a Quasi static test (QST), which were preliminary tested under a series of artificial earthquake motions referred to as a Pseudo dynamic test (PDT). The seismic enhancement effect of FRP wrap was also investigated on these RC bridge piers. Six specimens were loaded to induce probable damage by four series of artificial earthquakes, which were developed to be compatible with earthquakes in the Korean peninsula by the Korea Highway Corporation (KHC). Directly after the PDT, six earthquake-experienced columns were subjected to inelastic cyclic loading under a constant axial load of $0.1{f_c}^{\prime}A_g$. Two other reference specimens without the PDT were also subjected to similar quasi-static loads. Test results showed that specimens pre-damaged by moderate artificial earthquakes generally demonstrated good residual seismic performance, which was similar to the corresponding reference specimen. Moreover, RC bridge specimens retrofitted with wrapping fiber composites in the potential plastic hinge region exhibited enhanced flexural ductility.

Keywords

References

  1. AASHTO (2004), 'AASHTO LRFD bridge design specification', American Association of State Highway and Transportation Officials, USA
  2. Aboutaha, R.S., Engelhardt, M.D., Jirsa, J.O. and Kreger, M.E. (1999), 'Experimental investigation of seismic repair of lap splice failures in damaged concrete columns', ACI Struct. J, 96(2),297-307
  3. Chai, Y., Priestley, M.J.N. and Seible, F. (1991), 'Seismic retrofit of circular bridge columns for enhanced flexural performance', ACI Struct. J. 88(5), 572-584
  4. Chang, S.P., Kim, J.K., Kim, l.H. and Lim, H.W. (2000), 'The influence of lap splice of longitudinal bars in the plastic hinge zone on the nonlinear behavior characteristics of RC piers and new seismic detailing concept in moderate seismicity region,' Proc. the Earthq. Eng. Soc. Korea Conf, 4(1), 335-340
  5. Chung, Y.S., Lee, KK, Han, GH. and Lee, D.H. (1999), 'Quasi-static test for seismic performance of circular R.C. bridge piers before and after retrofitting', J of the Korea Concrete Institute, 11(5), 107-118
  6. Chung, Y.S., Park, C.K. and Lee, E.H. (2004), 'Seismic performance and damage assessment of reinforced concrete bridge piers with lap-spliced longitudinal steels', Struct. Eng. Mech., 17(1), 51-68 https://doi.org/10.12989/sem.2004.17.1.051
  7. Einea, A., Yehia, S. and Tadros, M.K (1999), 'Lap splices in confined concrete', ACI Struct. J, 96(6), 947-955
  8. EJ-Bahy, Ashraf, Kunnath, Sashi, Stone, William, and Taylor, Andrew (1999), 'Cumulative seismic damage of circular bridge columns: Variable amplitude tests', ACI Struct. J. 96(5), 711-720
  9. Jaradat, O.A., McLean, D.l. and Marsh, M.L. (1998), 'Performance of existing bridge columns under cyclic loading - Part 1: Experimental results and observed behavior', ACI Struct. J. 95(6),695-704
  10. KHBDS (2000), 'Korea highway bridge design specification', Korea Road & Transportation Association, Ministry of Construction and Transportation
  11. Lehman, D.E., Gookin, S.E., Nacamuli, A.M. and Moehle, J.P. (2001), 'Repair of earthquake-damaged bridge columns', ACI Struct. J., 98(2), 233-242
  12. Melek, Murat and Wallace, John W. (2004), 'Cyclic behavior of columns with short lap splices', ACI Struct. J, 101(6),802-811
  13. Park, Y.J. and Ang, Alfredo H-S. (1985), 'Mechanistic seismic damage model for reinforced concrete', J of Struct. Eng., 111(4), 722-739 https://doi.org/10.1061/(ASCE)0733-9445(1985)111:4(722)
  14. Priestley, MJ.N., Seible, F. and Calvi, GM. (1996), Seismic Design and Retrofit of Bridges, John Wiely & Sons Inc., New York
  15. Saadatmanesh, H., Ehsani, M.R. and Jin, L. (1996), 'Seismic strengthening of circular bridge pier models with fiber composites', ACI Struct. J, 93(6), 639-647
  16. Seible, F., Priestley, MJ.N., Hegemier, GA. and Innamorato, D. (1997), 'Seismic retrofit of RC columns with continuous carbon fiber jackets', J of Composites for Construction, 1(2), 52-62 https://doi.org/10.1061/(ASCE)1090-0268(1997)1:2(52)

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