A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A Study of the Behavior of I-Section Prestressed Concrete Girders Subject to Torsion
Available data and theories concerning the torsional strength of prestressed concrete members are reviewed. A study of the torsional strength of eccentrically prestressed concrete bridge girders is reported, involving the testing of eighteen full-scale I-section girders and six rectangular section members. The primary variables were the average prestress (0,530 and 1150 psi), and the amount of web reinforcement provided (six values). Measurements were made of applied torque, angle of twist, web reinforcement strain, and crack width. The primary effect of the prestress was to increase the contribution of the concrete to ultimate torsional strength, the contribution of the web reinforcement being unchanged. This behavior is analagous to the influence of prestress on shear strength. The prestress also improved the serviceability of the girders by delaying the formation of diagonal tension cracks and reducing their width when they did occur, and by increasing the torsional stiffness of the girders after cracking. (Author)
A Study of the Behavior of I-Section Prestressed Concrete Girders Subject to Torsion
Available data and theories concerning the torsional strength of prestressed concrete members are reviewed. A study of the torsional strength of eccentrically prestressed concrete bridge girders is reported, involving the testing of eighteen full-scale I-section girders and six rectangular section members. The primary variables were the average prestress (0,530 and 1150 psi), and the amount of web reinforcement provided (six values). Measurements were made of applied torque, angle of twist, web reinforcement strain, and crack width. The primary effect of the prestress was to increase the contribution of the concrete to ultimate torsional strength, the contribution of the web reinforcement being unchanged. This behavior is analagous to the influence of prestress on shear strength. The prestress also improved the serviceability of the girders by delaying the formation of diagonal tension cracks and reducing their width when they did occur, and by increasing the torsional stiffness of the girders after cracking. (Author)
A Study of the Behavior of I-Section Prestressed Concrete Girders Subject to Torsion
A. N. Wyss (author) / J. B. Garland (author) / A. H. Mattock (author)
1969
113 pages
Report
No indication
English
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