Experimental Study on the Stress Increment of Prestressed Tendons of Retard-Bonded Prestressed Concrete Continuous Beams

Abstract:

Based on the bending experiment for two-span continuous beams of retard-bonded prestress concrete, the analysis of the stress increment of prestressed tendons is made in the loading process. The theory that the working performance of retard-bonded prestressed concrete members is as same as unbonded prestressed concrete members during the retarding period is demonstrated. It is feasible to use the formulas for the reference (Technical specification for concrete structures prestressed with unbonded tendons) to calculate σ_puthe ultimate stress and Δσ_p the Stress increment of the retard-bonded prestressed tendons and the recommended formulas are advised to use. It is also demonstrated that retard-bonded prestressed concrete members have the same working performance as bonded prestressed concrete members after the retarding period. The conclusion of this paper can provide the reference date for the design of retard-bonded prestressed concrete continuous beam.

• Periodical: Advanced Materials Research (Volumes 163-167)
• Pages: 1431-1435
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.163-167.1431
• Online since: December 2010
• Authors: Qiang Fu, Xia Cao, Ling Zhi Jin, Wan Xu Zhu, Hui Xian Yang, Zhu Bai Shu
• Keywords: Continuous Beam, Experimental Study, Prestressed Concrete, Retard-Bonded, Stress Increment

References

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