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자료유형
학술저널
저자정보
(The University of Melbourne) (The University of Melbourne) (The University of Melbourne) (The University of Melbourne)
저널정보
한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.13 No.5
발행연도
수록면
643 - 665 (23page)

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초록· 키워드

The paper aims to develop theoretical expressions for the ductility design of very-high strength concrete (VHSC) (> 100 MPa) columns using curvature and a new flexural energy-based ductility approach. Eventually, the study aims to evaluates the feasibility of VHSC columns for different ductility classes, considering the limitation of providing a higher volume of transverse reinforcement due to possible steel congestion in the construction phase. An analytical program based on the experimental stress–strain relationship of confined VHSC, which is validated using experimental programs on VHSC columns, is used to evaluate the ductility of VHSC columns for different parameters such as axial load ratio, confinement pressure, longitudinal steel ratio, yield strength of transverse steel, cover area and compressive strength of concrete. The theoretical curvature ductility and flexural rotation-based energy ductility of 3200 rectangular columns were evaluated using the analytical program. Using curvature ductility and the new flexural rotationbased energy ductility for different parameters, a regression analysis is carried out to develop expressions for the ductility design of VHSC columns up to 150 MPa. Using the new definition of energy-based ductility, a new expression is developed for limited ductility design of VHSC; and it is concluded that the new approach reduces the required amount of steel confinement due to an increase in the energy ductility of VHSC at higher axial load ratios and higher strengths. The studies show that reinforced VHSC can be used for structures with nominal ductility demands.
#very-high strength concrete #ductility design #transverse reinforcement #curvature ductility #energy ductility #moment–curvature analysis #tall building
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목차

  1. Abstract
  2. 1. Introduction
  3. 2. Summary of Ductility Design of Reinforced
  4. 3. Theoretical Method to Predicting the Ductility of VHSC Columns
  5. 4. Method for Parametric Study and Developing Expressions for Ductility
  6. 5. Conclusion
  7. References

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