Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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A Study on Design Criteria of Direct Punching Shear for Column Footings

기초판에 대한 직접뚫림전단 설계기준의 고찰

  • Lee, Sang-Sup (Korea Institute of Civil Engineering and Building Technology)
  • Received : 2017.06.05
  • Accepted : 2017.08.16
  • Published : 2017.10.30
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Abstract

At first, two-way shear was assumed to be critical on a vertical section through the slab or footing extending around the column. Since then, most of the numerical models have focused on investigating the shear stress at the critical section and the location of critical section, but are often insufficient to exactly estimate the punching shear strength. In 2012, Korea Concrete Institute introduced the strain-based strength model to predict the two-way shear strength of reinforced concrete slabs more accurately. In this paper, provisions of the 2012 version of Concrete Design Code(KCI2012) and 2016 version of the Korea Building Code(KBC2016) related to punching shear design of reinforced concrete flat plates and footings at their connections with columns are reviewed, with intension to distinguish between the footing design and the flat plate design. To prove this intension, the test results of 4 specimens and the analysis results of 14 footing models are compared to the punching shear design strength for calibration of footing design provisions.

Keywords

Acknowledgement

Supported by : 국토교통과학기술진흥원, 한국건설기술연구원

References

  1. ACI Committee 318. (2014). Building Code Requirements for Structural Concrete (ACI318M-14) and Commentary (ACI 318M-14), American Concrete Institute, USA.
  2. Architectural Institute of Korea (2016). Korea Building Code (KBC2016 / KBC2009), Seoul, Korea.
  3. Bazant, Z. P., & Cao, Z. (1987). Size Effect in Punching Shear Failure of Slabs, ACI Structural Journal, 84(1), 44-53.
  4. Bolviken, I. S. (2013). Models for Punching Shear Capacity in Concrete Slabs, Master Thesis, Norwegian University of Science and Technology, 8-9.
  5. BS 8110. (1997). Structural Use of Concrete, Part 1, Code of Practice for Design and Construction, British Standards Institution, London.
  6. CEN (2004). Eurocode2-Design of Concrete Structures: Part 1-1 General Rules and Rules for Buildings, EN 1992-1-1, ComiteEuropeen de Normalisation, Brussels, Belgium.
  7. Choi, K., & Park, H. (2003). Strength model for punching shear of flat plate-column connections, Journal Korea Concrete Institute, 16(2), 163-174.
  8. Choi, K., & Park, H. (2010a). Shear strength model for interior flat plate-column connections, Journal Korea Concrete Institute, 22(3), 345-356. https://doi.org/10.4334/JKCI.2010.22.3.345
  9. Choi, K., Park, H., & Kim, H. (2010b). Shear Strength Model for Slab-Column Connections, Journal Korea Concrete Institute, 22(4), 585-593. https://doi.org/10.4334/JKCI.2010.22.4.585
  10. Hsu, T. T. C., & Mo, Y. L (2010). Unified theory of concrete structures, 2nd edition, John Wiley & Sons Inc.
  11. Korea Concrete Institute (2012). Concrete Design Code and Commentary (KCI2012), Kimoondang Publishing Co., Korea.
  12. Korea Institute of Civil Engineering and Building Technology (2013). Development of Reinforced Concrete Footing Reinforced with MSP(Multiple Shear Preventer), 56
  13. Korea Institute of Civil Engineering and Building Technology (2016). Practical Application of Punching Shear Preventer for Concrete Footing (MSP), 71
  14. Korea Institute of Civil Engineering and Building Technology (2016). Improvement of Punching Shear Preventer for Extended Application to Thick Concrete Footings, 68
  15. Manterola, M. (1966). Poinconnement de Ddalles Ssans Aarmature d'effort Ttrenchant, ComiteEuropeen du Beton (Hrsg.), Dalles, Structures Pplanes, CEB-Bull, Paris, d'Information.
  16. Moe, J. (1961). Shearing Strength of Reinforced Concrete Slabs and Footings under Concentrated Loads, Bulletin D47, Portland Cement Association, Skokie, IL.
  17. Richart, F. E. (1948). Reinforced Concrete Walls and Column Footings, Part 1 and 2. ACI Journal, 45(2), 97-127.
  18. Saenz, L. P. (1964). Discussion of 'Equation for the stress-strain curve of concrete' by P. Desayi, and S. Krishnan, ACI Journal, 61.
  19. Sherif, A. G., Emara, M. B., Ibrahim, A. H., & Magd, S. A. (2005). Effect of the Column Dimensions on the Punching Shear Strength of Edge Column-Slab Connections, ACI Structural Journal, 232, 175-192.
  20. Talbot, A. N. (1913). Reinforced Concrete Wall Footings and Column Footing, Engineering Experiment Station, University of Illinois, Bulletin 67.
  21. Urban, T., Goldyn, M., Krakowski, J., & Krawczyk, L. (2013). Experimental investigation on punching behavior of thick reinforced concrete slabs, Archives of Civil Engineering, 59(2), 157-174. https://doi.org/10.2478/ace-2013-0008