Calculation Method of Ultimate Stress of External Prestressed Tendons on Bridge

HUANG Qiao, RONG Xue-liang, YANG Ming

China Journal of Highway and Transport ›› 2010, Vol. 23 ›› Issue (6) : 78-84.

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China Journal of Highway and Transport ›› 2010, Vol. 23 ›› Issue (6) : 78-84.
Original Article

Calculation Method of Ultimate Stress of External Prestressed Tendons on Bridge

  • HUANG Qiao1,2, RONG Xue-liang2, YANG Ming1
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Abstract

Based on evaluation and analysis of calculation methods for ultimate stress of external prestressed tendons, a simplified calculating mode was chosen which fitted experimental result and was convenient for application. Related parameters were amended and a simple and practical formula for ultimate stress of external prestressed tendons was proposed with reference to standards and criteria of Chinese highway bridge construction industry. Three calculating demonstrations about ultimate stress of external prestressed tendons for strengthening designs of reinforced concrete simply-supported beam bridges, prestressed concrete simply-supported beam bridges and prestressed concrete continuous beam bridges were given. The results show that the recommended calculation method for ultimate stress of external prestressed tendons is practical and reliable. The recommended formula has been brought into Specification of Strengthening Design of Highway Bridges, which can be used in design and calculation of bridge strengthening by external prestressing method.

Key words

bridge engineering / bridge strengthening / theoretical analysis / external prestress / ultimate stress / safety factor

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HUANG Qiao, RONG Xue-liang, YANG Ming. Calculation Method of Ultimate Stress of External Prestressed Tendons on Bridge[J]. China Journal of Highway and Transport, 2010, 23(6): 78-84

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