Earthquakes and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Design for earthquake-resistant short RC structural walls

  • Zygouris, Nick St. (Lithos Consulting Engineers) ;
  • Kotsovos, Gerasimos M. (Lithos Consulting Engineers) ;
  • Kotsovos, Michael D. (Laboratory of Concrete Research, National Technical University of Athens)
  • Received : 2014.03.19
  • Accepted : 2014.10.13
  • Published : 2015.03.25
⟨ Previous Next ⟩

Abstract

The application of the compressive force path method for the design of earthquake-resistant reinforced concrete structural walls with a shear span-to-depth ratio larger than 2.5 has been shown by experiment to lead to a significant reduction of the code specified transverse reinforcement within the critical lengths without compromising the code requirements for structural performance. The present work complements these findings with experimental results obtained from tests on structural walls with a shear span-to-depth ratio smaller than 2.5. The results show that the compressive force path method is capable of safeguarding the code performance requirements without the need of transverse reinforcement confining concrete within the critical lengths. Moreover, it is shown that ductility can be considerably increased by improving the strength of the two bottom edges of the walls through the use of structural steel elements extending to a small distance of the order of 100 mm from the wall base.

Keywords

References

  1. American Concrete Institute (2011), Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary (ACI 318R-11).
  2. Eurocode 2 (2004), Design of concrete structures, Part 1-1: General rules and rules of building, British Standards.
  3. Eurocode 8 (2004), Design of structures for earthquake resistance, Part 1: General rules, seismic actions and rules for buildings, British Standards.
  4. Cotsovos, D.M. and Kotsovos, M.D. (2007), "Seismic design of structural concrete walls: an attempt to reduce reinforcement congestion", Mag. Concrete Res., 59(9), 627-637. https://doi.org/10.1680/macr.2007.59.9.627
  5. Greifenhagen, C. and Lestuzzi, P. (2005), "Static cyclic tests on lightly reinforced concrete shear walls", Eng. Struct., 27, 1703-1712. https://doi.org/10.1016/j.engstruct.2005.06.008
  6. Hidalgo, P.A., Ledezma, C.A. and Jordan, R.M. (2002), "Seismic behavior of squat reinforced concrete shear walls", Earthq. Spectra, 18(2), 287-308. https://doi.org/10.1193/1.1490353
  7. Kotsovos, G.M. (2011), "Assessment of the flexural capacity of RC beam/column elements allowing for 3D effects", Eng. Struct., 33(10), 2772-2780 https://doi.org/10.1016/j.engstruct.2011.06.002
  8. Kotsovos, M.D. (2014), Compressive force-path method: Unified ultimate limit-state design of concrete structures, Springer, Switzerland.
  9. Kotsovos, G.M., Cotosvos, D.M., Kotsovos, M.D. and Kounadis, A.N. (2011), "Seismic behaviour of RC walls: An attempt to reduce reinforcement congestion", Mag. Concrete Res., 63(4), 235-246. https://doi.org/10.1680/macr.10.00001
  10. Kotsovos, M.D. and Pavlovic, M.N. (1999), Ultimate limit-state design of concrete structures: A new approach, Thomas Telford, London.
  11. Kotsovos, G.M. and Kotsovos, M.D. (2008), "Criteria for structural failure of RC beams without transverse reinforcement", Struct. Eng., 86(23/24), 55-61.
  12. Kuang, J.S. and Ho, Y.B. (2008), "Seismic behavior and ductility of squat reinforced concrete shear walls with nonseismic detailing", ACI Struct. J., 105(2), 225-231.
  13. Salonikios, T.N., Kappos, A.J., Tegos, I.A. and Penelis, G.G. (1999), "Cyclic load behavior of lowslenderness reinforced concrete walls: Design basis and test results", ACI Struct. J., 96(4), 649-660.
  14. Takahashi, S., Yoshida, K., Ichinose, T., Sanada, Y., Matsumoto, K., Fukuyama, H. and Suwada, H. (2013), "Flexural drift capacity of reinforced concrete wall with limited confinement", ACI Struct. J., 110(1), 95-104.

Cited by

  1. Mechanical model for seismic response assessment of lightly reinforced concrete walls vol.11, pp.3, 2016, https://doi.org/10.12989/eas.2016.11.3.461
  2. Stirrup design for critical lengths of reinforced-concrete structural members vol.170, pp.7, 2017, https://doi.org/10.1680/jstbu.16.00147