Steel and Composite Structures

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Seismic behavior and strength of L-shaped steel reinforced concrete column-concrete beam planar and spatial joints

  • Chen, Zongping (College of Civil Engineering and Architecture, Guangxi University) ;
  • Xu, Deyi (College of Civil Engineering and Architecture, Guangxi University) ;
  • Xu, Jinjun (College of Civil Engineering, Nanjing Tech University) ;
  • Wang, Ni (College of Civil and Environment Engineering, Chang'an University)
  • Received : 2020.06.17
  • Accepted : 2021.04.12
  • Published : 2021.05.10
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Abstract

The study presented experimental and numerical investigation on the seismic performance of steel reinforced concrete (SRC) L-shaped column- reinforced concrete (RC) beam joints. Various parameters described as steel configuration form, axial compressive ratio, loading angle, and the existence of slab were examined through 4 planar joints and 7 spatial joints. The characteristics of the load-displacement response included the bearing capacity, ductility, story drift ratio, energy-dissipating capacity, and stiffness degradation were analyzed. The results showed that shear failure and flexural failure in the beam tip were observed for planar joints and spatial joint, respectively. And RC joint with slab failed with the plastic hinge in the slab and bottom of the beam. The results indicated that hysteretic curves of spatial joints with solid-web steel were plumper than those with hollow-web specimens. The capacity of planar joints was higher than that of space joints, while the opposite was true for energy-dissipation capacity and ductility. The high compression ratio contributed to the increase in capacity and initial stiffness of the joint. The elastic and elastic-plastic story deformation capacity of L-shaped column frame joints satisfied the code requirement. A design formula of joint shear resistance based on the superposition theory and equilibrium plasticity truss model was proposed for engineering application.

Keywords

Acknowledgement

The research was financially supported by the National Natural Science Foundation of China (N0.50908057 and 51268004), Special Fund Project for "Bagui" Scholars ([2019] No.79), Guangxi Science and Technology Base and Talent Special Project (AD21075031) and Innovation Project of Guangxi Graduate Education (YCBZ2019025, YCBZ2020027).

References

  1. Beutel, J., Thambiratnam, D. and Perera, N. (2002), "Cyclic behaviour of concrete filled steel tubular column to steel beam connections", Eng. Struct., 24(1), 29-38. https://doi.org/10.1016/S0141-0296(01)00083-9.
  2. Braga, F., Gigliotti, R. and Laterza, M. (2009), "R/C existing structures with smooth reinforcing bars: experimental behaviour of beam-column joints subject to cyclic lateral loads", Open Constr. Build. Technol. J., 3(1),
  3. Cao, W., Huang, X., Song, W., Tian, B. and Cui, Y. (2005), "Experiment and non-linear element analyses of seismic behavior of short specially shaped columns with crossed reinforcing bars", Jianzhu Jiegou Xuebao, 26(3), 30-37. (in Chinese).
  4. Chen, C.C. and Lin, K.T. (2009), "Behavior and strength of steel reinforced concrete beam-column joints with two-side force inputs", J. Constr. Steel Res., 65(3), 641-649. https://doi.org/10.1016/j.jcsr.2008.03.010.
  5. Chen, Z., Xu, J., Chen, Y. and Xue, J. (2015), "Seismic behavior of steel reinforced concrete (SRC) T-shaped column-beam planar and 3D hybrid joints under cyclic loads", Earthq. Struct., 8(3), 555-572. http://dx.doi.org/10.12989/eas.2015.8.3.555.
  6. JGJ 149 (2006), Technical specification for concrete structures with specially shaped columns, China, M.o.H.a.U.-R.D.o., Beijing, China
  7. GB50011 (2010), Code for seismic design of buildings, China, N.S.o.t.P.s.R.o., Beijing, China
  8. Chou, C.C. and Uang, C.M. (2007), "Effects of continuity plate and transverse reinforcement on cyclic behavior of SRC moment connections", J. Struct. Eng., 133(1), 96-104. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:1(96)5.
  9. Dundar, C. and Sahin, B. (1993), "Arbitrarily shaped reinforced concrete members subject to biaxial bending and axial load", Comput. Struct., 49(4), 643-662. https://doi.org/10.1016/0045-7949(93)90069-P.
  10. Ghobarah, A., Saatcioglu, M. and Nistor, I. (2006), "The impact of the 26 December 2004 earthquake and tsunami on structures and infrastructure", Eng. Struct., 28(2), 312-326. https://doi.org/10.1016/j.engstruct.2005.09.028.
  11. Hakuto, S., Park, R. and Tanaka, H. (2000), "Seismic load tests on interior and exterior beam-column joints with substandard reinforcing details", Struct. J., 97(1), 11-25.
  12. Hsu, C.T.T. (1989), "T-shaped reinforced concrete members under biaxial bending and axial compression", Struct. J., 86(4), 460-468.
  13. Mahadevappa, P. (1992), "Computer aided analysis of reinforced concrete columns subjected to axial compression and bending-I L-shaped sections", Comput. Struct., 44(5), 1121-1138. https://doi.org/10.1016/0045-7949(92)90333-U.
  14. Marin, J. (1979). "Design aids for L-shaped reinforced concrete columns", Journal Proceedings.
  15. Mirza, S. and Lacroix, E.A. (2004), "Comparative strength analyses of concrete-encased steel composite columns", J. Struct. Eng., 130(12), 1941-1953. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:12(1941).
  16. Montava Belda, I., Irles Mas, R., Pomares Torres, J.C. and Gonzalez Sanchez, A. (2019), "Experimental Study of Steel Reinforced Concrete (SRC) Joints", Applied Science.
  17. N,W. (2014), "Research on seismic performance of steel reinforced concrete L-shaped column space corner joint", Ph.D; Guangxi University.
  18. Pan, P., Lin, X., Lam, A., Chen, H. and Ye, L. (2014), "Monotonic loading tests of ring-beam connections for steel reinforced concrete columns and RC beams", J. Struct. Eng., 140(4), 04013092. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000911.
  19. Pantazopoulou, S.J. and Bonacci, J. (1994), "On earthquake-resistant reinforced concrete frame connections", Can. J. Civil Eng., 21(2), 307-328. https://doi.org/10.1139/l94-032.
  20. Park, H.G., Hwang, H.J., Lee, C.H., Park, C.H. and Lee, C.N. (2012), "Cyclic loading test for concrete-filled U-shaped steel beam-RC column connections", Eng. Struct., 36, 325-336. https://doi.org/10.1016/j.engstruct.2011.12.033.
  21. Prota, A., Nanni, A., Manfredi, G. and Cosenza, E. (2004), "Selective upgrade of underdesigned reinforced concrete beam-column joints using carbon fiber-reinforced polymers", Struct. J., 101(5), 699-707.
  22. Ramamurthy, L. and Khan, T.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)
  23. Thomas, C.T. and M. ASCE (1985), "Biaxially loaded L-shaped reinforced concrete columns", J. Struct. Eng., 111(12), 2576-2595. https://doi.org/10.1061/(ASCE)0733-9445(1983)109:8(1903).
  24. Wakabayashi, M. and Minami, K. (1980), "Developments in composite and mixed construction: recent experimental studies on the hysteretic characteristics of beam-to-column connections in composite structures", Proceedings of the USA-Japan seminar on composite structures and mixed structural systems.
  25. Wang, W., Chen, Y., Li, W. and Leon, R.T. (2011), "Bidirectional seismic performance of steel beam to circular tubular column connections with outer diaphragm", Earthq. Eng. Struct. D., 40(10), 1063-1081. https://doi.org/10.1002/eqe.1070.
  26. Wang, Y. (2008), "Lessons learned from the "5.12" Wenchuan Earthquake: evaluation of earthquake performance objectives and the importance of seismic conceptual design principles", Earthq. Eng. Eng. Vib., 7(3), 255-262. https://doi.org/10.1007/s11803-008-0886-8.
  27. Xiang, P., Deng, Z., Su, Y., Wang, H. and Wan, Y. (2017), "Experimental investigation on joints between steel-reinforced concrete T-shaped column and reinforced concrete beam under bidirectional low-cyclic reversed loading", Adv. Struct. Eng., 20(3), 446-460. https://doi.org/10.1177/1369433216653841.
  28. Xu, C., Peng, S., Wang, C. and Ma, Z. (2020), "Influence of the degree of damage and confinement materials on the seismic behavior of RC beam-SRC column composite joints", Compos. Struct., 231, 111002. https://doi.org/10.1016/j.compstruct.2019.111002.
  29. Xu, J., Chen, Z., Chen, Y. and Xue, J. (2015), "Earthquake damage evaluation of T-shaped SRC composite column-steel beams in 3D connection joints", Adv. Struct. Eng., 18(5), 701-713. https://doi.org/10.1260/1369-4332.18.5.701.
  30. Xue, J., Chen, Z., Zhao, H., Gao, L. and Liu, Z. (2012), "Shear mechanism and bearing capacity calculation on steel reinforced concrete special-shaped columns", Steel Compos. Struct., 13(5), 473-487. https://doi.org/10.12989/scs.2012.13.5.473.
  31. Yang, Y., Wang, Y., Fu, F. and Liu, J. (2015), "Static behavior of T-shaped concrete-filled steel tubular columns subjected to concentric and eccentric compressive loads", Thin-Wall. Struct., 95, 374-388. https://doi.org/10.1016/j.tws.2015.07.009.
  32. Zhao, Y., Li, Z. and Chen, Y. (2004), "Research on limit values of axial compression ratios of specially shaped RC columns in case of 4th aseismic grade", J. Build. Struct., 25(3), 58-62. (in Chinese) https://doi.org/10.3321/j.issn:1000-6869.2004.03.009