The maximum lengths for simple - span pretensioned composite girders were investigated analytically using concrete strengths varying from 6 to 15 ksi (41 to 103 Mpa), and prestressing strands of 0.5 in., 0.5 in. Modified, and 0.6 in. (12.7, 12.7 and 15.2 mm) diameter. Both AASHTO and NU (developed by the University of Nebraska) sections were investigated. Girder spacings were varied From 5 to 11 ft (1.5 to 3.4 m).
展开▼
