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A platform for research: civil engineering, architecture and urbanism
Shear Strength of Pretensioned Concrete Girders in Negative Moment Regions
The report presents the results of an experimental study performed to evaluate the suitability of current AASHTO/ACI design provisions for shear as applied to thin-web pretensioned I-girders subject to shear and negative-moment bending. Eight tests were performed on four pretensioned beams with varying tendon profiles and amounts of shear reinforcement. Behavior was measured and observed to collect information on cracking loads, inclination and size of diagonal cracks, failure modes and loads, steel strains, and end slip of prestressing strands. Observed behavior was compared to predicted behavior based on the 1983 AASHTO Specifications for Highway Bridges and the 1983 ACI Building Code. In addition, the application of strut-and-tie models to thin-web, pretensioned I-beams was examined. Four variations of a basic strut-and-tie model were evaluated. Based on observed web-crushing failures, a strut-width definition for non-parallel diagonal struts was proposed in conjunction with a concrete efficiency factor definition for thin webs.
Shear Strength of Pretensioned Concrete Girders in Negative Moment Regions
The report presents the results of an experimental study performed to evaluate the suitability of current AASHTO/ACI design provisions for shear as applied to thin-web pretensioned I-girders subject to shear and negative-moment bending. Eight tests were performed on four pretensioned beams with varying tendon profiles and amounts of shear reinforcement. Behavior was measured and observed to collect information on cracking loads, inclination and size of diagonal cracks, failure modes and loads, steel strains, and end slip of prestressing strands. Observed behavior was compared to predicted behavior based on the 1983 AASHTO Specifications for Highway Bridges and the 1983 ACI Building Code. In addition, the application of strut-and-tie models to thin-web, pretensioned I-beams was examined. Four variations of a basic strut-and-tie model were evaluated. Based on observed web-crushing failures, a strut-width definition for non-parallel diagonal struts was proposed in conjunction with a concrete efficiency factor definition for thin webs.
Shear Strength of Pretensioned Concrete Girders in Negative Moment Regions
A. C. Powers (author) / M. E. Kreger (author) / J. E. Breen (author)
1990
130 pages
Report
No indication
English
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