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Performance evaluation and hysteretic modeling of low rise reinforced concrete shear walls

  • Nagender, T. (Reactor Safety Division, Bhabha Atomic Research Centre) ;
  • Parulekar, Y.M. (Reactor Safety Division, Bhabha Atomic Research Centre) ;
  • Rao, G. Appa (Department of Civil Engineering, Indian Institute of Technology Madras)
  • Received : 2018.05.03
  • Accepted : 2018.12.01
  • Published : 2019.01.25

Abstract

Reinforced Concrete (RC) shear walls are widely used in Nuclear power plants as effective lateral force resisting elements of the structure and these may experience nonlinear behavior for higher earthquake demand. Short shear walls of aspect ratio less than 1.5 generally experience combined shear flexure interaction. This paper presents the results of the displacement-controlled experiments performed on six RC short shear walls with varying aspect ratios (1, 1.25 and 1.5) for monotonic and reversed quasi-static cyclic loading. Simulation of the shear walls is then carried out by Finite element modeling and also by macro modeling considering the coupled shear and flexure behaviour. The shear response is estimated by softened truss theory using the concrete model given by Vecchio and Collins (1994) with a modification in softening part of the model and flexure response is estimated using moment curvature relationship. The accuracy of modeling is validated by comparing the simulated response with experimental one. Moreover, based on the experimental work a multi-linear hysteretic model is proposed for short shear walls. Finally ultimate load, drift, ductility, stiffness reduction and failure pattern of the shear walls are studied in details and hysteretic energy dissipation along with damage index are evaluated.

References

  1. Beko, A., Rosko, P., Wenzel, H., Pegon, P., Markovic, D. and Molina, F.J. (2015), "RC shear walls: full-scale cyclic test, insights and derived analytical model", Eng. Struct., 102, 120131.
  2. Brun, M., Labbe, P., Betrand, D. and Courtois, A. (2011), "Pseudodynamic tests on low-shear walls and simplified model based on the structural frequency drift", Eng. Struct., 33, 769-812.
  3. Brun, M., Reynouard, J.M. and Jezequel, L. (2003), "A simple shear wall model taking into account stiffness degradation", Eng. Struct., 25, 1-9. https://doi.org/10.1016/S0141-0296(02)00084-6
  4. Christidis, K.I. and Trezos, K.G. (2017), "Experimental investigation of existing non-conforming RC shear walls", Eng. Struct., 140, 26-38. https://doi.org/10.1016/j.engstruct.2017.02.063
  5. Cosenza, E., Manfredi, G. and Ramasco, R. (1993), "The use of damage functionals in earthquake engineering: a comparison between different methods", Earthq. Eng. Struct. Dyn., 22, 855868.
  6. Duffey, T.A., Goldman, A. and Farrar, C.R. (1993), "Shear wall ultimate drift limits", USNRC, NUREG/CR-6104.
  7. FEMA-356 (2000), Pre-Standard and Commentary for the Seismic Rehabilitation of Buildings, ASCE, Virginia, U.S.A.
  8. FEMA-461 (2007), Interim Testing Protocols for Determining the Seismic Performance Characteristics of Structural and Nonstructural Components, ASCE, Virginia, U.S.A.
  9. Feng, D.C., Ren, X.D. and Li, J. (2018), "Cyclic behavior modeling of reinforced concrete shear walls based on softened damage-plasticity model", Eng. Struct., 166, 363-375. https://doi.org/10.1016/j.engstruct.2018.03.085
  10. Ghobarah, A. (2001), "Performance-based design in earthquake engineering:state of development", Eng. Struct., 23(8), 878-884. https://doi.org/10.1016/S0141-0296(01)00036-0
  11. Greifenhagen, C. and Lestuzzi, P. (2005), "Static cyclic tests on lightly reinforced concrete shear walls", Eng. Struct., 27(11), 1703-1712. https://doi.org/10.1016/j.engstruct.2005.06.008
  12. Habibi, F., Sheikh, S.A, Vecchio, F. and Panesar, D.K. (2018), "Effects of alkali-silica reaction on concrete squat shear walls", ACI Struct. J., 115(5), 1329-1339. https://doi.org/10.14359/51702238
  13. IS 13920 (1993), Ductile Detailing of Reinforced Concrete Structures Subjected to Seismic Forces-code of Practice, Bureau of Indian Standards, New Delhi, India.
  14. Jeong, S.H. and Jang, W.S. (2016), "Modeling of RC shear walls using shear spring and fiber elements for seismic performance assessment", J. Vib., 18(2), 1052-1059.
  15. Kent, D.C. and Park, R. (1971), "Flexural members with confined concrete", J. Struct. Div., Proc. of the American Society of Civil Engineers, 97(ST7), 1969-1990.
  16. Kollegger, J. and Mehlhorn, G. (1990), "Material model for the analysis of reinforced concrete surface structures", Comput. Mech., 6(5-6), 341-357. https://doi.org/10.1007/BF00350417
  17. Kotronis, P., Ragueneau, F. and Mazars, J. (2005), "A simplified modelling strategy for R/C walls satisfyingPS92 and EC8 design", Eng. Struct., 27(8), 1197-1208. https://doi.org/10.1016/j.engstruct.2005.03.003
  18. Lestuzzi, P. and Badoux, M. (2003), "The gamma-Model: A simple hysteretic model for reinforced walls", Paper no 126, Proceedings of the fib-Symposium: Concrete Structures in Seismic Regions, Athens, Greece.
  19. Lopes, M.S. (2001), "Experimental shear-dominated response of RC walls Part I: Objectives, methodology and results", Eng. Struct., 23, 229-239. https://doi.org/10.1016/S0141-0296(00)00041-9
  20. Lopes, M.S. (2001), "Experimental shear-dominated response of RC walls Part II: Discussion of results and design implications", Eng. Struct., 23, 564-574. https://doi.org/10.1016/S0141-0296(00)00042-0
  21. Otani, A. (1974), "Inelastic analysis of R/C frame structures", J. Struct. Div., ASCE, 100, 1433-1449.
  22. Palermo, D. and Vecchio, F. (2002), "Behavior of three dimensional reinforced concrete shear walls", ACI Struct. J., 99(1), 81-89.
  23. Park, R. and Ang, A.H.S. (1985), "Mechanistic seismic damage model for reinforced concrete", J. Struct. Eng., ASCE, 111(4), 722-739. https://doi.org/10.1061/(ASCE)0733-9445(1985)111:4(722)
  24. Parulekar, YM., Reddy, G., Singh, R.K., Gopalkrishnan, N. and Ramarao, G.V (2016), "Seismic performance evaluation of mid-rise Shear Walls: experiments and analysis", Struct. Eng. Mech., 59(2), 291-312. https://doi.org/10.12989/sem.2016.59.2.291
  25. Parulekar, YM., Reddy, G.R., Vaze, K.K., Pegon, P. and Wenzel, H. (2014), "Simulation of reinforced concrete short shear wall subjected to cyclic loading", Nucl. Eng. Des., 270, 344-335. https://doi.org/10.1016/j.nucengdes.2013.12.059
  26. Priestley, M. (1997), "Displacement-based seismic assessment of reinforced concrete buildings", J. Earthq. Eng., 1(1), 157-192. https://doi.org/10.1080/13632469708962365
  27. Saiidi, M. and Sozen, M.A. (1981), "Simple nonlinear seismic analysis of R/C structures", J. Struct. Div., Proceedings of the American Society of Civil Engineers, ASCE, 107(ST5), 937952.
  28. Salonikios, T.N., Kappos, A.J., Tegos, I.A. and Penelis, G.G. (1999), "Cyclic load behaviour of low slenderness r/c walls: design basis and test results", ACI Struct. J., 96(4), 649-660.
  29. Saritas, A. and Filippou, F.C. (2013), "Analysis of rc walls with a mixed formulation frame finite element", Comput. Concrete, 12(4), 519-536. https://doi.org/10.12989/cac.2013.12.4.519
  30. Takeda, T., Sozen, M.A. and Nielsen, N.M. (1970), "Reinforced concrete response to simulated earthquakes", J. Struct. Div., ASCE, 96(ST12), 2557-2573.
  31. Thomson, E.D., Perdomob, M.E., Picon, R., Maranteb, M.E. and Florez-Lopez, J. (2009), "Simplified model for damage in squat RC shear walls", Eng. Struct., 31, 2215-2223. https://doi.org/10.1016/j.engstruct.2009.05.020
  32. Vecchio, F.J. and Collins, M.P. (1986), "Modified compression-field theory for reinforced concrete beams subjected to shear", ACI J., 83(2), 219-231.
  33. Vecchio, F.J., Collins, M.P. and Aspiotis, J. (1994), "High strength concrete elements subjected to shear", ACI J., 91(4), 423-433.
  34. Vulcano, A., Bertero, V.V and Colotti, V. (1988),"Analytical modelling of RC structural walls", Proceedings, 9th World Conference on Earthquake Engineering, 6, Tokyo-Kyoto, Japan, 41-46.
  35. Wallace, J.W., Elwood, K.J. and Massone, L.M. (2008), "Investigation of the axial load capacity for lightly reinforced wall piers", J. Struct. Eng., ASCE, 134(9), 1548-1557 https://doi.org/10.1061/(ASCE)0733-9445(2008)134:9(1548)
  36. Yu, H. and Hwang, S. (2005), "Evaluation of softened truss model for strength prediction of reinforced concrete squat walls", J. Eng. Mech., ASCE, 131(8), 839-846. https://doi.org/10.1061/(ASCE)0733-9399(2005)131:8(839)