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

Architectural Institute of Korea (대한건축학회)
권호 표지
DOI QR코드

DOI QR Code

Evaluation of Rectangular Stress Block Parameters of Reactive Powder Concrete(RPC) Members

반응성 분체 콘크리트(RPC) 부재의 직사각형 응력블록 계수

  • Received : 2011.10.06
  • Published : 2012.07.25
⟨ Previous Next ⟩

Abstract

In this paper, an experimental investigation of six steel fiber reinforced reactive powder concrete(RPC) columns was carried out deriving the appropriate design parameters of flexural induced columns with very high strength of concrete. Tested specimens have 200 mm square cross sections. Two of four specimens have rebars with 400MPa yield strength and another two specimens have no rebars. The RPC mix contains 2% of 0.2mm diameter by 13mm long straight steel fibres with concrete strength ranging from 100 to 200 MPa. Columns were induced to the flexural load by specially designed moment arm located at the end of columns with 10,000kN UTM. From the experimental data on the axial load, moment and strains along the longitudinal direction of columns, we could aware of the stress block of RPC with ultra high strength of concrete would be had a lower value than we use before. Test values represented that rectangular stress block parameter of ultra-shigh strength concrete was comparatively lower than values from the code provisions for concrete structure. For the more reliable calculating for stress block parameters of ultra-high strength concrete, existing test data of stress block parameter were investigated and regression analysis was carried out proposing new equation of rectangular stress block parameter ${\alpha}_1$ and ${\beta}_1$.

Keywords

Acknowledgement

Supported by : 한국과학재단

References

  1. Richard, P., and Cheyrezy, M. H.(1994), "Reactive Powder Concretes with High Ductility and 200-800MPa Compressive Strength", ACI SP 144, 507-518.
  2. Jacques Resplendino(2008), Ultra-High Performance Concretes-recent realizations and research programs on UHPFRC bridges in France, Proceedings of the Second International Symposium on Ultra High Performance Concrete, Kassel, germany, 31-43.
  3. Mark Rebentrost, Gavin Wight(2008), Experience and Applications of Ultra-high Performance Concrete in Asia, Proceedings of the Second International Symposium on Ultra High Performance Concrete, Kassel, germany, 19-30.
  4. Obata, K., Sugano, S., Araki, H., Shirai, K. Kimura, H., Murakami, Y., Kiakaze, N.(2003) An experimental study on the compressive properties of super-high-strength concrete, Summary of Technical Papers of Annual Meeting of Architectural Institute of Japan, Vol. C-2, 13-14
  5. 한국콘크리트학회(2007) 콘크리트구조설계기준
  6. ACI Committee 318(2008) Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary (318M-08), American Concrete Institute, Farmington Hills, MI
  7. NewZealand Standard(1995), New Zealand Concrete Structures Standards (NZS 3101)
  8. CSA(1994), Design of concrete Structures, CSA A23.4 1994, Canadian Standards Association, Rexdale, Ontario
  9. European Committee for Standardization(2004) Eurocode 2 (EC2) Design of Concrete Structures, UK
  10. Hognestad, E., Hanson, N. W., and McHenry, D.(1955), Concrete Stress Distribution in Ultimate Strength Design, ACI Journal, Proceedings, 52( 4), 455-479
  11. Nedderman, H.(1973), Flexural Stress Distribution in Very-High Strength Concrete, MS thesis, Civil Engineering Department, University of Texas at Arlington, TX, Dec.
  12. Kaar, P. H., Hanson, N. W., and Capell, H. T.(1978) Stress-Strain Characteristics of High Strength Concrete, Douglas McHenry International Symposium on Concrete and Concrete Structures, SP-55, B. Bresler, ed., American Concrete Institute, Farmington Hills, MI, 161-185
  13. Swartz, S. E., Nikaeen, A., Narayan Babu, H. D., Periyaka uppan, N., and Refai, T. M. E.(1985), Structural Bending Properties of Higher Strength Concrete, High-Strength Concrete, SP-88, H. G. Russell, ed., American Concrete Institute, Farmington Hills, MI, 147-178
  14. Tan, T. H., and Nguyen, N. B.(2005) Flexural Behavior of Confined High-Strength Concrete Columns, ACI Structural Journal, 102(2), 198-205
  15. Schade, J. E.(1992) Flexural Concrete Stress in High Stren gth Concrete Columns, MS thesis, Civil Engineering Department, University of Calgary, Calgary, AB, Canada
  16. Pastor, J. A.(1986) High-Strength Concrete Beams, PhD thesis, Department of Civil Engineering, Cornell University, Ithaca, NY.