Computers and Concrete

  • 제8권4호
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  • Pages.473-489
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  • 2011
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Flexural ductility and deformability of reinforced and prestressed concrete sections

  • Au, Francis T.K. (Department of Civil Engineering, The University of Hong Kong) ;
  • Leung, Cliff C.Y. (Department of Civil Engineering, The University of Hong Kong) ;
  • Kwan, Albert K.H. (Department of Civil Engineering, The University of Hong Kong)
  • 투고 : 2010.01.12
  • 심사 : 2010.09.27
  • 발행 : 2011.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

In designing a flexural member for structural safety, both the flexural strength and ductility have to be considered. For this purpose, the flexural ductility of reinforced concrete sections has been studied quite extensively. As there have been relatively few studies on the flexural ductility of prestressed concrete sections, it is not well understood how various structural parameters affect the flexural ductility. In the present study, the full-range flexural responses of reinforced and prestressed concrete sections are analyzed taking into account the nonlinearity and stress-path dependence of constitutive materials. From the numerical results, the effects of steel content, yield strength and degree of prestressing on the yield curvature and ultimate curvature are evaluated. It is found that whilst the concept of flexural ductility in terms of the ductility factor works well for reinforced sections, it can be misleading when applied to prestressed concrete sections. For prestressed concrete sections, the concept of flexural deformability in terms of ultimate curvature times overall depth of section may be more appropriate.

키워드

참고문헌

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피인용 문헌

  1. Evaluation on Moment-Curvature Relations and Curvature Ductility Factor of Reinforced Concrete Beams with High Strength Materials vol.25, pp.3, 2013, https://doi.org/10.4334/JKCI.2013.25.3.283
  2. Flexural ductility of RC beam sections at high strain rates vol.12, pp.4, 2013, https://doi.org/10.12989/cac.2013.12.4.537
  3. Flexural ductility of reinforced and prestressed concrete sections with corrugated steel webs vol.16, pp.4, 2015, https://doi.org/10.12989/cac.2015.16.4.625
  4. Shear performance assessment of steel fiber reinforced-prestressed concrete members vol.16, pp.6, 2015, https://doi.org/10.12989/cac.2015.16.6.825
  5. Predictions of curvature ductility factor of doubly reinforced concrete beams with high strength materials vol.12, pp.6, 2013, https://doi.org/10.12989/cac.2013.12.6.831
  6. Design procedure for prestressed concrete beams vol.13, pp.2, 2014, https://doi.org/10.12989/cac.2014.13.2.235
  7. Non-linear analysis and moment redistribution of prestressed concrete members vol.166, pp.1, 2013, https://doi.org/10.1680/eacm.11.00021
  8. Automated design of optimum longitudinal reinforcement for flexural and axial loading vol.10, pp.2, 2012, https://doi.org/10.12989/cac.2012.10.2.149
  9. Collapse mechanism and robustness of precast segmental bridges vol.167, pp.4, 2014, https://doi.org/10.1680/bren.11.00045
  10. Improvements in meta-heuristic algorithms for minimum cost design of reinforced concrete rectangular sections under compression and biaxial bending vol.130, 2017, https://doi.org/10.1016/j.engstruct.2016.10.010