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- W849087514 abstract "This paper summarises selected continuous inter-related research investigations of the strength and behaviour of prestressed concrete bridge half-scale and full-size girders. These investigations address aspects of strength and behaviour related to: (1) strand blanketing; (2) shear behaviour under static load; (3) flexural behaviour; (4) fatigue strength and behaviour. The paper reviews: (1) Portland Cement Association (PCA) tests reported in 1965 and 1980; (2) Tulane University tests reported in 1975; and (3) University of Texas tests reported in 1984. The Texas research provided continuity, and expanded previous research, especially on the influence of: (1) stress losses; (2) strand stress ranges; (3) nominal tensile stresses; (4) overloads; (5) passive reinforcement. It directly addressed issues tabulated in the PCA report related to fatigue life. It indicates that: (1) fatigue failures will occur at and below the AASHTO design limit 0.50 units at less than 2 million cycles; and (2) at a maximal nominal tensile stress of approximately 0.46 unit, one specimen failed after 2.29 million cycles and another after 9.43 million cycles. It recommends that, when fatigue is considered important, design for pretensioned girders should be based on the stress range, determined from a cracked section analysis and the lower bound of the S-N curve appropriate for the strand. For the covering abstract of the conference see IRRD 858334. The French title of this paper is:- Resistance et comportement a la fatigue des poutres de pont en beton precontraint. The German title of this paper is:- Ermuedungsfestigkeit und Verhalten von Spannbetonbrueckentraegern." @default.
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- W849087514 date "1989-01-01" @default.
- W849087514 modified "2023-09-27" @default.
- W849087514 title "FATIGUE STRENGTH AND BEHAVIOR OF PRESTRESSED CONCRETE BRIDGE GIRDERS" @default.
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