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Shear strength prediction of PRC coupling beams with low span-to-depth ratio

  • Tian, Jianbo (School of Civil Engineering and Architecture, Xi'an University of Technology) ;
  • Shen, Dandan (School of Civil Engineering and Architecture, Xi'an University of Technology) ;
  • Li, Shen (School of Civil Engineering and Architecture, Xi'an University of Technology) ;
  • Jian, Zheng (School of Civil Engineering and Architecture, Xi'an University of Technology) ;
  • Liu, Yunhe (School of Civil Engineering and Architecture, Xi'an University of Technology) ;
  • Ren, Wengeng (School of Civil Engineering and Architecture, Xi'an University of Technology)
  • Received : 2019.02.02
  • Accepted : 2019.04.10
  • Published : 2019.06.25
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Abstract

The seismic performance of a coupled shear wall system is governed by the shear resistances of its coupling beams. The plate-reinforced composite (PRC) coupling beam is a newly developed form of coupling beam that exhibits high deformation and energy dissipation capacities. In this study, the shear capacity of plate-reinforced composite coupling beams was investigated. The shear strengths of PRC coupling beams with low span-to-depth ratios were calculated using a softened strut-and-tie model. In addition, a shear mechanical model and calculating method were established in combination with a multi-strip model. Furthermore, a simplified formula was proposed to calculate the shear strengths of PRC coupling beams with low span-to-depth ratios. An analytical model was proposed based on the force mechanism of the composite coupling beam and was proven to exhibit adequate accuracy when compared with the available test results. The comparative results indicated that the new shear model exhibited more reasonable assessment accuracy and higher reliability. This method included a definite mechanical model and reasonably reflected the failure mechanisms of PRC coupling beams with low span-to-depth ratios not exceeding 2.5.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, China Postdoctoral Science Foundation, Natural Science Basic Research Plan in Shaanxi Province of China,Young Talent fund of University Association for Science and Technology in Shaanxi

References

  1. ACI 318 (2014), Building Code Requirements for Structural Concrete and Commentary, American Concrete Institute; Michigan, USA.
  2. AISC (1999), Load and Resistance Factor Design Specification for Structural Steel Buildings, American Institute of Steel Construction, Michigan, USA.
  3. BS 8110 (1997), Code of Practice for Design and Construction. Part 1, Structural Use of Concrete, British Standard Institution; London, UK.
  4. Cheng, P.C. (2004), "Shear capacity of steel-plate reinforced concrete coupling beams", The Hong Kong University of Science and Technology, Hong Kong.
  5. Collins, M.P. (1986), "A rational approach to shear design-the 1984 Canadian code provisions", J. Neurosci., 83(6), 925-33.
  6. Foster, S.J. and Malik, A.R. (2002), "Evaluation of efficiency factor models used in strut-and-tie modeling of nonflexural members", J. Struct Eng., 128(5), 569-577. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:5(569).
  7. Habib, A.B. and Roja, M.A. (2016), "Performance based evaluation of RC coupled shear wall system with steel coupling beam", Steel Compos. Struct., 20(2), 337-355. http://dx.doi.org/10.12989/scs.2016.20.2.337.
  8. Hoang, L.C. and Nielsen, M.P. (1998), "Plasticity approach to shear design", Cement Concrete Compos., 20(6), 437-453. https://doi.org/10.1016/S0958-9465(98)00026-2.
  9. Hou, W. (2018), "Seismic performance of steel plate reinforced high toughness concrete coupling beams with different steel plate ratios", Compos. Part B., 159, 199-210. https://doi.org/10.1016/j.compositesb.2018.09.100.
  10. Hsu, T.T.C. and Mo, Y.L. (2010), Unified Theory of Concrete Structures, A John Wiley and Sons Ltd., Singapore.
  11. Hwang, S.J., Fang, W.H., Lee, H.J. and Yu, H.W. (2001), "Analytical model for predicting shear strength of squat walls", J. Struct Eng., 127(1), 43-50. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:1(43).
  12. Lam, W.Y. (2006), "Plate-reinforced composite coupling beams: experimental and numerical studies", The University of Hong Kong, Hong Kong.
  13. Lian, M., Su, M.L. and Guo, Y. (2017), "Experimental performance of Y-shaped eccentrically braced frames fabricated with high strength steel", Steel Compos. Struct., 24(4), 441-453. https://doi.org/10.12989/scs.2017.24.4.441.
  14. Liang, X.W. and Xing, P.T. (2018), "Seismic behavior of fiber reinforced cementitious composites coupling beams with conventional reinforcement", Earthq. Struct., 14(3), 261-271. https://doi.org/10.12989/eas.2018.14.3.261.
  15. Park, S. and Mosalam, K.M. (2012), "Analytical model for predicting shear strength of unreinforced exterior beam-column joints", ACI Struct. J., 109(2), 149-160.
  16. Ramirez, J. and Breen, J. (1991), "Evaluation of a modified truss model approach for beam in shear", ACI Struct. J., 88(5), 562-571.
  17. Seongwoo, G., Myoungsu, S., Benjamin, P. and Deokjung, L. (2014), "Nonlinear modeling parameters of RC coupling beams in a coupled wall system", Earthq. Struct., 7(5), 817-842. http://dx.doi.org/10.12989/eas.2014.7.5.817.
  18. Subedi, N.K. (1989), "Reinforced concrete beams with plate reinforcement for shear", Proc. Inst. Civil Eng., Part Res. Theor., 87(3), 377-399. https://doi.org/10.1680/iicep.1989.2972.
  19. Subedi, N.K. and Baglin, P.S. (1997), "Plate reinforced concrete beams: experimental work", Eng. Struct., 21(3), 232-254. https://doi.org/10.1016/S0141-0296(97)00171-5.
  20. Suen, P.C. (2012), "Steel-plate encased concrete coupling beams", The Hong Kong University of Science and Technology, Hong Kong.
  21. Thorburn, L.J., Kulak, G.L. and Montgomery, C.J. (1983), "Analysis of steel plate shear walls", Structural Engineering Report No. 107, University of Alberta, Edmonton.
  22. Tian, J.B., Wang, Y.C. and Li, S. (2019), "Seismic performance and design method of PRC coupling beam-hybrid coupled shear wall system", Earthq. Struct., 16(1), .83-96.. https://doi.org/10.12989/eas.2019.16.1.083.
  23. Tsonos, A.G. (2007), "Cyclic load behaviour of reinforced concrete beam-column subassemblages of modern structures", ACI Struct. J., 194(4), 468-478. https://doi.org/10.2495/ERES050421.
  24. Wang, P. and Shi, Q.X. (2015), "Experimental behavior and shear bearing capacity calculation of RC columns with a vertical splitting failu", Earthq. Struct., 9(6), 1233-1250. http://dx.doi.org/10.12989/eas.2015.9.6.1233.
  25. Wang, P., Shi, Q.X. and Wang, F. (2017), "Experimental investigation of SRHSC columns under biaxial loading", Earthq. Struct., 13(5), 485-496. https://doi.org/10.12989/eas.2017.13.5.485.
  26. Wong, H.F. and Kuang, J.S. (2014), "Predicting shear strength of RC interior beam-column joints by modified rotating-angle softened-truss model", Comput. Struct., 133(3), 12-17. https://doi.org/10.1016/j.compstruc.2013.11.008.
  27. Xing, G.H., Liu, B.Q. and Wu, T. (2011), "Shear strength of reinforced concrete frame joints using softened strut and tie model", J. Build Struct., 32(5), 125-134.
  28. Zhang, G. (2005), "Experimental study on seismic behavior of steel plate reinforced concrete coupling beams", Tsinghua University, Beijing, China.
  29. Zhang, L.X. and Hsu, T.T.C. (1998), "Behavior and analysis of 100 MPa concrete membrane elements", J. Struct Eng., 124(1), 24-34. https://doi.org/10.1061/(ASCE)0733-9445(1998)124:1(24).