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Transfer And Development Length Of Fully Bonded 15.2 mm (0.6 in) Diameter Prestressing Strand In Standard Aashto Type I Concrete Beams

Jobson, Heather L

1997

It is necessary to use 15.2 mm (0.6 in) diameter prestressing strand in order to fully utilize the properties of high-strength concrete currently used in standard pretensioned prestressed concrete beams. Therefore, tests were performed to further investigate the previously questioned anchorage characteristics of 15.2 mm (0.6 in) diameter prestressing strand at 51 mm (2 in) grid spacing. Conclusions based on test results, regarding such issues as transfer length, development length, and strand pull-out, are presented and compared with related literature. The specimens are AASHTO Type I highway bridge girders containing bright, fully bonded 15.2 mm (0.6 in) diameter prestressing strand. Each specimen has a composite concrete deck. Also, the beams in the test program have varying concrete strengths, as well as the variable of horizontal shear reinforcement.

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