Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Experimental study on seismic performance of steel reinforced concrete T-shaped columns

  • Liu, Zuqiang (School of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Zhou, Chaofeng (School of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Xue, Jianyang (School of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Leon, Roberto T. (Department of Civil and Environmental Engineering, Virginia Tech)
  • Received : 2019.11.08
  • Accepted : 2020.07.09
  • Published : 2020.08.10
⟨ Previous Next ⟩

Abstract

This study investigates the seismic performance of steel reinforced concrete (SRC) T-shaped columns under low cyclic loading tests. Based on test results of ten half-scale column specimens, failure patterns, hysteretic behavior, skeleton curves, ultimate strength, ductility, stiffness degradation and energy dissipation capacity were analyzed. The main variables included loading angles, axial compression ratios and steel ratios. The test results show that the average values of the ductility factor and the equivalent viscous damping coefficient with respect to the failure of the columns were 5.23 and 0.373, respectively, reflecting good seismic performance. The ductility decreased and the initial stiffness increased as the axial compression ratio of the columns increased. The strength increased with increasing steel ratio, as expected. The columns displaced along the web had higher strength and initial stiffness, while the columns displaced along the flange had better ductility and energy dissipation capacity. Based on the test and analysis results, a formula is proposed to calculate the effective stiffness of SRC T-shaped columns.

Keywords

Acknowledgement

The research was funded by National Natural Science Foundation of China PR (No. 51308444), Shaanxi Innovation Capacity Support Programs (No. 2019TD-029 and No.2019KJXX-018), Scientific research project of Shaanxi Education Department (No.17JS163) and Science Foundation of Henan University of Technology (No.2019BS048), which are gratefully acknowledged.

References

  1. Abo-Zai, L., Hassan, A. and Abdel-Hafez, L.M. (2019), "Reparing post-heated L-shaped RC columns with advanced thin concrete jacketing", Constr. Build. Mater., 44(2),212-218. https://doi.org/10.1016/j.conbuildmat.2019.06.101.
  2. Chen, Z.P., Xu, J.J., Chen, Y.L. and Xue, J.Y. (2016), "Axial compression ratio limit values for steel reinforced concrete (SRC) special-shaped columns", Steel Compos. Struct., 20(2), 295-316. https://doi.org/10.12989/scs.2016.20.2.295.
  3. Elwood, K.J. and Eberhard, M.O. (2009), "Effective stiffness of reinforced concrete columns", ACI Struct. J., 106(4), 476-484. https://doi.org/10.14359/56613.
  4. Hsu, T.C. (1989), "T-shaped reinforced concrete members under biaxial bending and axial compression", ACI Struct. J., 86(4), 460-468. https://doi.org/10.14359/2967.
  5. Kara, I.F., Ashour, A.F. and Koroglu, M.A. (2015), "Flexural behavior of hybrid FRP/steel reinforced concrete beams", Compos. Struct., 129, 111-121. https://doi.org/10.1016/j.compstruct.2015.03.073.
  6. Kim, H.G., Kim, H.M. and Kim, S.D. (2012), "Axial behavior and strength of yLC composite columns", Adv. Struct. Eng., 15(12), 2113-2130. https://doi.org/10.1260/1369-4332.15.12.2113.
  7. Kim, C.S., Park, H.G., Chung, K.S. and Choi, I.R. (2014), "Eccentric axial load capacity of high-strength steel-concrete composite columns of various sectional shapes", J. Struct. Eng., 140(4), 04013091. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000879.
  8. Li, J., Wu, J.Y., Zhou, D.Y. and Nie L.P. (2002), "Experimental research on wide flange specially shaped section columns subjected to cyclic loading", J. Build. Struct., 23(1), 9-14. (in Chinese) https://doi.org/10.14006/j.jzjgxb.2002.01.002.
  9. Liu, Z.Q., Xue, J.Y. and Zhao, H.T. (2016), "Seismic behavior of steel reinforced concrete special-shaped column-beam joints", Earthq. Struct., 11(4), 665-680. https://doi.org/10.12989/eas.2016.11.4.665.
  10. Lai, B.L., Liew, J.Y.R. and Xiong, M.X. (2019), "Experimental and analytical investigation of composite columns made of high strength steel and high strength concrete", Steel Compos. Struct., 33(1), 899-911. https://doi.org/10.12989/scs.2019.33.1.899.
  11. Montava, I., Irles, R., Pomares, J.C. and Gonzalez, A. (2019), "Experimental study of steel reinforced concrete (SRC) joints", Appl. Sciences-Basel, 9(8), 1528. https://doi.org/10.3390/app9081528.
  12. Nzabonimpa J.D. and Hong W.K. (2019), "Experimental investigation of hybrid mechanical joints for L-shaped columns replacing conventional grouted sleeve connections", Eng. Struct., 185, 243-277. https://doi.org/10.1016/j.engstruct.2019.01.123.
  13. Nie, J.G., Ma, X.W., Tao, M.X., Fan, J.S. and Bu, F.M. (2014), "Effective stiffness of composite shear wall with double plates and filled concrete", J. Constr. Steel Res., 99, 140-148. https://doi.org/10.1016/j.jcsr.2014.04.001.
  14. Pham, T.P. and Li, B. (2015), "Seismic performance assessment of L-shaped reinforced concrete columns", ACI Struct. J., 112(6), 667-678. https://doi.org/10.1061/9780784412848.146.
  15. Patton, M.L. and Singh, K.D. (2017), "Buckling of fixed-ended concrete-filled steel columns under axial compression", Int. J. Steel Struct., 17(3), 1059-1071. https://doi.org/10.1007/s13296-017-9016-7.
  16. Park, R. and Paulay, T. (1975), Reinforced concrete structures, John Wiley and Sons, New York, NY, USA.
  17. Ramamurthy, L.N. and Khan, A.H. (1983), "L-shaped column design for biaxial eccentricity", J. Struct. Eng., 109(8), 1903-1917. https://doi.org/10.1061/(asce)0733-9445(1983)109:8(1903).
  18. Tsao, W.H. and Hsu, C.T.T. (1993), "A nonlinear computer analysis of biaxially loaded L-shaped slender reinforced concrete columns", Comput. Struct., 49(4), 579-588. https://doi.org/10.1016/0045-7949(93)90062-I.
  19. Tokgoz, S. and Dundar, C. (2012), "Test of eccentrically loaded Lshaped section steel fibre high strength reinforced concrete and composite columns", Eng. Struct., 38(5), 134-141. https://doi.org/10.1016/j.engstruct.2012.01.009.
  20. Xiao, J.Z., Li, J. and Chen, J. (2011), "Experimental study on the seismic response of braced reinforced concrete frame with irregular columns", Earthq. Eng. Eng. Vib., 10(4), 487-494. https://doi.org/10.1007/s11803-011-0083-z.

Cited by

  1. Seismic behavior of steel reinforced concrete column with welded studs subjected to combined action of compression-bending-shear-torsion vol.252, 2020, https://doi.org/10.1016/j.engstruct.2021.113727