Earthquakes and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Experimental investigation of SRHSC columns under biaxial loading

  • Wang, Peng (School of Civil Engineering, Xi'an University of Architecture & Technology) ;
  • Shi, Qing X. (School of Civil Engineering, Xi'an University of Architecture & Technology) ;
  • Wang, Feng (School of Civil Engineering, Xi'an University of Architecture & Technology) ;
  • Wang, Qiu W. (School of Civil Engineering, Xi'an University of Architecture & Technology)
  • Received : 2017.01.15
  • Accepted : 2017.12.26
  • Published : 2017.11.25
⟨ Previous Next ⟩

Abstract

The behavior of 8 steel reinforced high-strength concrete (SRHSC) columns, which comprised of four identical columns with cross-shaped steel and other four identical columns with square steel tube, was investigated experimentally under cyclic uniaxial and biaxial loading independently. The influence of steel configuration and loading path on the global behavior of SRHSC columns in terms of failure process, hysteretic characteristics, stiffness degradation and ductility were investigated and discussed, as well as stress level of the longitudinal and transverse reinforcing bars and steel. The research results indicate that with a same steel ratio deformation capacity of steel reinforced concrete columns with a square steel tube is better than the one with a cross-shaped steel. Loading path affects hysteretic characteristics of the specimens significantly. Under asymmetrical loading path, hysteretic characteristics of the specimens are also asymmetry. Compared with specimens under unidirectional loading, specimens subjected to bidirectional loading have poor carrying capacity, fast stiffness degradation, small yielding displacement, poor ductility and small ultimate failure drift. It also demonstrates that loading paths affect the deformation capacity or deformation performance significantly. Longitudinal reinforcement yielding occurs before the peak load is attained, while steel yielding occurs at the peak load. During later displacement loading, strain of longitudinal and transverse reinforcing bars and steel of specimens under biaxial loading increased faster than those of specimens subjected to unidirectional loading. Therefore, the bidirectional loading path has great influence on the seismic performance such as carrying capacity and deformation performance, which should be paid more attentions in structure design.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

References

  1. Ahmad, S.H. and Weerakoon, S.L. (1995), "Model for behavior of slender reinforced concrete columns under biaxial bending", ACI Struct. J., 92(2), 188-198.
  2. Bechtoula, H., Kono, S. and Watanabe, F. (2005), "Experimental and analytical investigations of seismic performance of cantilever reinforced concrete columns under varying transverse and axial loads", J. Asian Arch. Build. Eng., 4, 467-474. https://doi.org/10.3130/jaabe.4.467
  3. Bousias, S.N., Verzeletti, G., Fardis, M.N. and Gutierrez, E. (1995), "Load-path effects in column biaxial bending with axial force", J. Eng. Mech., 121, 596-605. https://doi.org/10.1061/(ASCE)0733-9399(1995)121:5(596)
  4. Chang, S.Y. (2010), "Experimental studies of reinforced concrete bridge columns under axial load plus biaxial bending", J. Struct. Eng., 136(1), 12-25. https://doi.org/10.1061/(ASCE)0733-9445(2010)136:1(12)
  5. de Sousa Jr, J.B. and Caldas, R.B. (2005), "Numerical analysis of composite steel-concrete columns of arbitrary cross section", J. Struct. Eng., 131(11), 1721-1730. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:11(1721)
  6. Dundar, C., Tokgoz, S., Tanrikulu, A.K. and Baran, T. (2008), "Behaviour of reinforced and concrete-encased composite columns subjected to biaxial bending and axial load", Build. Environ., 43(6), 1109-1120. https://doi.org/10.1016/j.buildenv.2007.02.010
  7. Farah, A. and Huggins, M.W. (1969), "Analysis of reinforced concrete subjected to longitudinal load and biaxial bending", ACI J., 66(7), 569-575.
  8. Furlong, R.W. (1979), "Concrete columns under biaxial eccentric thrust", ACI J., 76(10), 1093-1118.
  9. GB 50011-2010, (2010), Code for Seismic Design of Buildings, Beijing.
  10. Germano, F., Tiberti, G. and Plizzari, G. (2016), "Experimental behavior of SFRC columns under uniaxial and biaxial cyclic loads", Compos. Part B, 85, 76-92.
  11. Hong, H.P. (2000), "Short reinforced concrete column capacity under biaxial bending and axial load", Can. J. Civil. Eng., 27, 1173-1182. https://doi.org/10.1139/l00-054
  12. Hong, H.P. (2001), "Strength of slender reinforced concrete columns under biaxial bending", J. Struct. Eng., 127(7), 758-762. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:7(758)
  13. Hsu, C.T.T. (1985), "Biaxially loaded L-shaped reinforced concrete columns", J. Struct. Eng., 111(12), 2576-2595. https://doi.org/10.1061/(ASCE)0733-9445(1985)111:12(2576)
  14. Hsu, C.T.T. (1989), "T-shaped reinforced concrete members under biaxial bending and axial compression", ACI. Stuct. J., 86(4), 460-468.
  15. Kang, H.Z. and Jiang, J.J. (2003), "Experiment study on seismic behavior of RC frame columns under varied loading paths", Chin. Civil Eng. J. 36(5), 71-75.
  16. Kozinski, K. and Winnicki, A. (2016), "Experimental research and analysis of load capacity and deformability of slender high strength concrete columns in biaxial bending", Eng. Struct., 107, 47-65. https://doi.org/10.1016/j.engstruct.2015.10.025
  17. Mavichak, V. and Furlong, R.W. (1976), "Strength and stiffness of reinforced concrete columns under biaxial bending", Res. Rep. 7-2F, Ctr. for Hwy. Res., University of Texas at Austin, Austin.
  18. Munoz, P.R. and Hsu, C.T.T. (1997), "Behavior of biaxially loaded concrete-encased composite columns", J. Struct. Eng., 123, 1163-1171. https://doi.org/10.1061/(ASCE)0733-9445(1997)123:9(1163)
  19. Otani, S., Cheung, V.M.T. and Lai, S.S. (1977), "Reinforced concrete columns subjected to biaxial lateral load reversals", Proceedings of the 6th World Conference on Earthquake Engineering, New Delhi, India, January.
  20. Poston, R.W., Breen, J.E. and Roesset, J.M. (1985a), "Analysis of nonprismatic or hollow slender concrete bridge piers", ACI J., 82(5), 731-739.
  21. Poston, R.W., Gilliam, T.E., Yamamoto, Y. and Breen, J.E. (1985b), "Hollow concrete bridge pier behavior", ACI J., 82(6), 779-787.
  22. Qiu, F.W., Li, W.F., Pan, P. and Qian, J. (2002), "Experimental tests on RC columns under biaxial quasi-static loading", Eng. Struct., 24, 419-428. https://doi.org/10.1016/S0141-0296(01)00108-0
  23. Quang, K.M., Dang, V.B.P., Han, S.W., Shin, M. and Lee, K. (2016), "Behavior of high-performance fiber-reinforced cement composite columns subjected to horizontal biaxial and axial loads", Constr. Build. Mater., 106, 89-101. https://doi.org/10.1016/j.conbuildmat.2015.12.087
  24. Rodrigues, H., Arede, A., Varum, H. and Costa, A.G. (2013b), "Experimental evaluation of rectangular reinforced concrete column behaviour under biaxial cyclic loading", Earthq. Eng. Struct. D., 42, 239-259. https://doi.org/10.1002/eqe.2205
  25. Rodrigues, H., Arede, A., Varum, H. and Costa, A.G. (2013c), "Damage evolution in reinforced concrete columns subjected to biaxial loading", B. Earthq. Eng., 11, 1517-1540. https://doi.org/10.1007/s10518-013-9439-2
  26. Rodrigues, H., Furtado, A. and Arede, A. (2016), "Behavior of rectangular reinforced-concrete columns under biaxial cyclic loading and variable axial loads", J. Struct. Eng., 142(1), 04015085. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001345
  27. Rodrigues, H., Romao, X., Campos, A.A., Varum, H., Arede, A. and Costa, A.G. (2012b), "Simplified hysteretic model for the representation of the biaxial bending response of RC columns", Eng. Struct., 44, 146-158. https://doi.org/10.1016/j.engstruct.2012.05.050
  28. Rodrigues, H., Varum, H., Arede, A. and Costa, A.G. (2012a), "A comparative analysis of energy dissipation and equivalent viscous damping of RC columns subjected to uniaxial and biaxial loading", Eng. Struct., 35, 149-164. https://doi.org/10.1016/j.engstruct.2011.11.014
  29. Rodrigues, H., Varum, H., Arede, A. and Costa, A.G. (2013a), "Behaviour of reinforced concrete column under biaxial cyclic loading-state of the art", Adv. Struct. Eng., 5(4), 1-12. https://doi.org/10.1186/2008-6695-5-1
  30. Sayed, M.E. and Maaddawy, T.E. (2011), "Analytical model for prediction of load capacity of RC columns confined with CFRP under uniaxial and biaxial eccentric loading", Mater. Struct., 44, 299-311. https://doi.org/10.1617/s11527-010-9628-2
  31. Tokgoz, S. and Dundar, C. (2008), "Experimental tests on biaxially loaded concrete-encased composite columns", Steel Compos. Struct., 8(5), 423-438. https://doi.org/10.12989/scs.2008.8.5.423
  32. Tsuno, K. and Park, R. (2004), "Experimental study of reinforced concrete bridge piers subjected to bi-directional quasi-static loading", Eng. Struct., 21(1), 11-26. https://doi.org/10.2208/jsceseee.21.11s
  33. Ucak, A. and Tsopelas, P. (2015), "Load path effects in circular steel columns under bidirectional lateral cyclic loading", J. Struct. Eng., 141(5), 1-11.
  34. Wang, G.G. and Hsu, C.T.T. (1992), "Complete biaxial load-deformation behavior of RC columns", J. Struct. Eng., ASCE, 118(9), 2590-2609. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:9(2590)
  35. Wang, G.G. and Hsu, C.T.T. (1998), "Nonlinear analysis of reinforced concrete columns by cubic-spline function", J. Eng. Mech., ASCE, 124(7), 803-810. https://doi.org/10.1061/(ASCE)0733-9399(1998)124:7(803)
  36. Warner, R.F. (1969), "Biaxial moment thrust curvature relation", J. Struct. Div., ASCE, 95(5), 923-940.