Structural Engineering and Mechanics

  • 제10권2호
  • /
  • Pages.165-180
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  • 2000
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Strength of prestressed concrete beams in torsion

  • Karayannis, Chris G. (Department of Civil Engineering, Democritus University of Thrace) ;
  • Chalioris, Constantin E. (Department of Civil Engineering, Democritus University of Thrace)
  • 발행 : 2000.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

An analytical model with tension softening for the prediction of the capacity of prestressed concrete beams under pure torsion and under torsion combined with shear and flexure is introduced. The proposed approach employs bilinear stress-strain relationship with post cracking tension softening branch for the concrete in tension and special failure criteria for biaxial stress states. Further, for the solution of the governing equations a special numerical scheme is adopted which can be applied to elements with practically any cross-section since it utilizes a numerical mapping. The proposed method is mainly applied to plain prestressed concrete elements, but is also applicable to prestressed concrete beams with light transverse reinforcement. The aim of the present work is twofold; first, the validation of the approach by comparison between experimental results and analytical predictions and second, a parametrical study of the influence of concentric and eccentric prestressing on the torsional capacity of concrete elements and the interaction between torsion and shear for various levels of prestressing. The results of this investigation presented in the form of interaction curves, are compared to experimental results and code provisions.

키워드

참고문헌

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  3. Experimental investigation of RC beams with rectangular spiral reinforcement in torsion vol.56, 2013, https://doi.org/10.1016/j.engstruct.2013.05.003
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  8. New modifying truss model and numerical simulation of steel fiber reinforced concrete under pure torsion vol.14, 2018, https://doi.org/10.1016/j.istruc.2018.02.001
  9. Experimental study of the torsion of reinforced concrete members vol.23, pp.6, 2006, https://doi.org/10.12989/sem.2006.23.6.713
  10. Simplified Model for the Torsional Strength of Concrete Beams with GFRP Stirrups vol.19, pp.1, 2015, https://doi.org/10.1061/(ASCE)CC.1943-5614.0000498
  11. Experiments and calculation of U-shaped thin-walled RC members under pure torsion vol.106, 2016, https://doi.org/10.1016/j.engstruct.2015.10.019
  12. Direct Design of Partially Prestressed Concrete Hollow Beams vol.9, pp.4, 2006, https://doi.org/10.1260/136943306778812741
  13. Optimization-Based Improved Softened-Membrane Model for Rectangular RC Members under Combined Shear and Torsion vol.145, pp.2, 2019, https://doi.org/10.1061/(asce)st.1943-541x.0002228
  14. Flexural Behavior of Posttensioned Concrete Beams with Unbonded High-Strength Strands vol.2020, pp.None, 2000, https://doi.org/10.1155/2020/5317456
  15. Torsion of circular open cross-section with corrugated inner and outer surface vol.73, pp.1, 2000, https://doi.org/10.12989/sem.2020.73.1.075
  16. Shear Performance for Prestressed Concrete Hollow Core Slabs vol.10, pp.5, 2020, https://doi.org/10.3390/app10051636
  17. Investigating the behavior of lightweight foamed concrete T-beams under torsion, shear, and flexure vol.219, pp.None, 2000, https://doi.org/10.1016/j.engstruct.2020.110741
  18. Shear and Torsional Design of Reinforced Concrete Members with High-Strength Reinforcement vol.147, pp.2, 2021, https://doi.org/10.1061/(asce)st.1943-541x.0002887