Structural Engineering and Mechanics

  • 제34권2호
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  • Pages.189-211
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  • 2010
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Investigating the negative tension stiffening effect of reinforced concrete

  • Zanuy, Carlos (Department of Continuum Mechanics and Structures, E.T.S. Ingenieros de Caminos, Canales y Puertos, Universidad Politecnica de Madrid)
  • 투고 : 2008.11.13
  • 심사 : 2009.11.11
  • 발행 : 2010.01.30
⟨ 이전 논문 다음 논문 ⟩

초록

The behaviour of a reinforced concrete tension member is governed by the contribution of concrete between cracks, tension stiffening effect. Under highly repeated loading, this contribution is progressively reduced and the member response approximates that given by the fully cracked member. When focusing on the unloaded state, experiments show deformations larger than those of the naked reinforcement. This has been referred to as negative tension stiffening and is due to the fact that concrete carries compressive stresses along the crack spacing, even thought the tie is subjected to an external tensile force. In this paper a cycle-dependent approach is presented to reproduce the behaviour of the axially loaded tension member, paying attention to the negative tension stiffening contribution. The interaction of cyclic bond degradation and time-dependent effects of concrete is investigated. Finally, some practical diagrams are given to account for the negative tension stiffening effect in reinforced concrete elements.

키워드

참고문헌

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  4. Performance of the centre section of broad gage prestressed concrete sleepers under fatigue loading and controlled cracking 2018, https://doi.org/10.1002/suco.201600229
  5. Time-dependent changes in the instantaneous stiffness of reinforced concrete beams vol.126, 2016, https://doi.org/10.1016/j.engstruct.2016.08.025
  6. Fatigue Behavior of Reinforced Concrete Haunched Beams without Stirrups vol.112, pp.3, 2015, https://doi.org/10.14359/51687411
  7. Estimation of parameters defining negative tension stiffening vol.32, pp.10, 2010, https://doi.org/10.1016/j.engstruct.2010.07.009
  8. Investigating deformations of RC beams: experimental and analytical study vol.13, pp.6, 2014, https://doi.org/10.12989/cac.2014.13.6.799
  9. Transverse fatigue behaviour of lightly reinforced concrete bridge decks vol.33, pp.10, 2011, https://doi.org/10.1016/j.engstruct.2011.06.008
  10. Behaviour of cracked reinforced concrete beams under repeated and sustained load types vol.56, 2013, https://doi.org/10.1016/j.engstruct.2013.05.034
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  12. Modeling of Tension-Stiffening Behavior of Reinforced Concrete Beams vol.368-373, pp.1662-8985, 2011, https://doi.org/10.4028/www.scientific.net/AMR.368-373.2098
  13. Flexural behavior of concrete beams reinforced with aramid fiber reinforced polymer (AFRP) bars vol.38, pp.4, 2010, https://doi.org/10.12989/sem.2011.38.4.459
  14. Modelos de transferencia del pretensado: análisis comparativo vol.65, pp.272, 2010, https://doi.org/10.1016/s0439-5689(14)70002-6
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  16. Composite Behavior of RC-HPFRC Tension Members under Service Loads vol.14, pp.1, 2010, https://doi.org/10.3390/ma14010047