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Modelling of reinforced concrete flat slab-column connections for system-scale seismic analyses of high-rise buildings

  • T.Y., Yang (Department of Civil Engineering, University of British Columbia) ;
  • O., AlHarras (School of Engineering, University of British Columbia) ;
  • L., Tobber (School of Engineering, University of British Columbia) ;
  • O., Sargazi (School of Engineering, University of British Columbia)
  • Received : 2020.09.06
  • Accepted : 2022.11.10
  • Published : 2023.01.25

Abstract

Reinforced concrete flat slab (RCFS) with columns is a standard gravity floor system for tall buildings in North America. Typically, RCFS-column connections are designed to resist gravity loads, and their contribution to resisting seismic forces is ignored. However, past experimental research has shown that RCFS-column connections have some strength and ductility, which may not be ignored. Advanced numerical models have been developed in the past to determine the nonlinear cyclic behavior of RCFS-column connections. However, these models are either too complicated for nonlinear dynamic analysis of an entire building or not developed to model the behavior of modern RCFS-column connections. This paper proposes a new nonlinear model suitable for modern RCFS-column connections. The numerical model is verified using experimental data of specimens with various material and reinforcement properties. A 40-story RC shear wall building was designed and analyzed to investigate the influence of RCFS on the global response of tall concrete buildings. The seismic responses of the building with and without the RCFS were modelled and compared. The results show that the modelling of RCFS has a significant impact on the inter-story drifts and force demands on both the seismic force-resisting and gravity elements.

Keywords

Acknowledgement

The authors would like to acknowledge the funding provided by the International Joint Research Laboratory of Earthquake Engineering (ILEE), National Science Foundation China (51778486), Canadian Institute of Steel Construction (CISC) to support the graduate students.

References

  1. ACI 318 Committee (2014), Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary, American Concrete Institute, 503.
  2. ACI Committee 352 (2011), Guide for Design of Slab-Column Connections in Monolithic Concrete Structures (ACI 352.1R-11), American Concrete Institute.
  3. Al-Katib, H.A.A., Alkhudery, H.H. and Al-Katib, A.A.A. (2019), "Flat slab-column modeling using finite element with eccentric loading effects", Iran. J. Sci. Technol. Trans. Civil Eng., 44, 513-521. https://doi.org/10.1007/s40996-019-00249-z.
  4. ASCE. (2016), Minimum Design Loads for Buildings and Other Structures (ASCE/SEI 7-16), American Society of Civil Engineers.
  5. Coronelli, D. and Corti, G. (2014), "Nonlinear static analysis of flat slab floors with grid model", ACI Struct. J., 111(2), 343-351. https://doi.org/10.14359/51686526.
  6. CSA A23.3 Committee (2014), Design of Concrete Structures: A National Standard of Canada, Canadian Standards Association, Rexdale, Canada.
  7. De Souza, R.M. (2000), "Force-based finite element for large displacement inelastic analysis of frames", PhD Thesis, Civil and Environmental Engineering, University of California, Berkeley.
  8. Dovich, L. and Wight, J. (1996), "Lateral response of older flat slab frames and the economic effect on retrofit", Earthq. Spectra, 12(4), 667-691. https://doi.org/10.1193/1.1585905.
  9. Feng, D.C., Xie, S.C., Ning, C.L. and Liang, S.X. (2019), "Investigation of modeling strategies for progressive collapse analysis of RC frame structures", J. Perform. Constr. Facil., 33, 04019063. https://doi.org/10.1061/(asce)cf.1943-5509.000132.
  10. Hawkins, N.M., Mitchell, D. and Hanna, S.N. (1975), "The effects of shear reinforcement on the reversed cyclic loading behavior of flat plate structures", Can. J. Civil Eng., 2(4), 572-582. https://doi.org/10.1139/l75-052.
  11. Huang, Y. (2012), "Finite element method for post-tensioned prestressed concrete structures", PhD Thesis, Department of Civil Engineering, University of Oklahoma.
  12. Hwang, S. and Moehle, J.P. (2000), "Models for laterally loaded slab-column frames", ACI Struct. J., 97(2), 345-352. https://doi.org/10.14359/866.
  13. Isufi, B., Cismasiu, I., Marreiros, R., Pinho Ramos, A. and Lucio, V. (2020), "Role of punching shear reinforcement in the seismic performance of flat slab frames", Eng. Struct., 207, 110238. https://doi.org/10.1016/j.engstruct.2020.110238.
  14. Kang, T.H., Wallace, J.W. and Elwood, K.J. (2009), "Nonlinear modelling of flat-plate systems", J. Struct. Eng., 135(2), 147-158. https://doi.org/10.1061/(ASCE)0733-9445(2009)135:2(147).
  15. Kang, T.H.K. and Wallace, J.W. (2005), "Dynamic responses of flat plate systems with shear reinforcement", ACI Struct. J., 102(5), 763-773.
  16. Lee, T.H. and Mosalam, K.M. (2005), "Seismic demand sensitivity of reinforced concrete shear-wall building using FOSM method", Earthq. Eng. Struct. Dyn., 34(14), 1719-1736. https://doi.org/10.1002/eqe.506.
  17. Liu, J., Tian, Y., Orton, S.L. and Said, A.M. (2015), "Resistance of flat-plate buildings against progressive collapse. I: Modeling of slab-column connections", J. Struct. Eng., 141, 04015053. https://doi.org/10.1061/(asce)st.1943-541x.0001294.
  18. Megally, S. and Ghali, A. (2000), "Seismic behavior of edge column-slab connections with stud shear reinforcement", ACI Struct. J., 97(1), 53-60. https://doi.org/10.14359/833.
  19. NBCC (2010), National Building Code of Canada, Canadian Commission on Building and Fire Codes, Institute for Research in Construction, Ottawa, Ontario.
  20. Pan, A.D. and Moehle, J.P. (1992), "An experimental study of slab-column connections", ACI Struct. J., 89(6), 626-638. https://doi.org/10.14359/4133.
  21. Park, H., Kim, Y., Song, J. and Kang, S. (2011), "Lattice shear reinforcement for enhancement of slab-column connections", J. Struct. Eng., 138(3), 425-437. https://doi.org/10.14359/18619.
  22. PEER (Pacific Earthquake Engineering Research Center) (2000), Open System for Earthquake Engineering Simulation (OpenSees), Univ. of California, Berkeley, CA.
  23. PEER (Pacific Earthquake Engineering Research Center) (2010), PEER Strong Motion Database, Univ. of California, Berkeley, CA.
  24. Setiawan, A., Vollum, R.L., Macorini, L. and Izzuddin, B.A. (2020), "Punching shear design of RC flat slabs supported on wall corners", Struct. Concrete, 21(3), 859-874. https://doi.org/10.1002/suco.201900514
  25. Surumi, R.S., Jaya, K.P. and Greeshma, S. (2015), "Modelling and assessment of shear wall-flat slab joint region in tall structures", Arab. J. Sci. Eng., 40, 2201-2217. https://doi.org/10.1007/s13369-015-1720-z.
  26. Tian, Y., Chen, J., Said, A. and Zhao, J. (2012), "Nonlinear modeling of flat-plate structures using grid beam elements", Comput. Concrete, 10(5), 491-507. https://doi.org/10.12989/cac.2012.10.5.489.
  27. Tian, Y., Jirsa, J.O., Bayrak, O. and Argudo, J.F. (2008), "Behavior of slab-column connections of existing flat-plate structures", ACI Struct. J., 105(5), 561.
  28. Tian, Y., Liu, X. and George, S. (2020), "Effects of vertical ground motion on seismic performance of reinforced concrete flat-plate buildings", J. Struct. Eng., 146(12), 04020258. https://doi.org/10.1061/(ASCE)ST.1943-541X.0002840.
  29. Wey, E.H. and Durrani, A.J. (1992), "Seismic response of interior slab-column connections with shear capitals", ACI Struct. J., 89(6), 682-691.
  30. Wieczorek, B. (2017), "Numerical analysis of the inner slab-column connection of RC structures loaded eccentrically", Procedia Eng., 190, 668-675. https://doi.org/10.1016/j.proeng.2017.05.39.
  31. Zhou, Y. and Hueste, M.B.D. (2017), "Review of test data for interior slab-column connections with moment transfer", Spec. Publ., 315, 141-166. https://doi.org/10.35789/fib.BULL.0081.Ch08