A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Live Load Distribution in Skewed Prestressed Concrete I-Beam and Spread Box-Beam Bridges
The effects of skew on the design moments and on the lateral distributions of statically applied vehicular loads are examined for prestressed concrete I-beam and prestressed concrete spread box-beam bridge superstructures. The finite element method is utilized to analyze 120 I-beam superstructures and 72 box-beam superstructures ranging in length from 34 ft. to 128 ft. and in roadway width from 24 ft. to 72 ft. Skew effects are correlated for bridges of different widths, span lengths, number of beams, and number of design lanes, and empirical expressions are developed to facilitate computation of lateral load distribution factors for interior and exterior beams. The proposed skew distribution factors are actually based upon appropriate modifications to the distribution factors for right bridges. In general, the skew correction factor reduces the distribution factor for interior beams and increases the distribution factor for exterior beams. The magnitude of the skew effect is primarily a function of skew angle and of bridge span and beam spacing.
Live Load Distribution in Skewed Prestressed Concrete I-Beam and Spread Box-Beam Bridges
The effects of skew on the design moments and on the lateral distributions of statically applied vehicular loads are examined for prestressed concrete I-beam and prestressed concrete spread box-beam bridge superstructures. The finite element method is utilized to analyze 120 I-beam superstructures and 72 box-beam superstructures ranging in length from 34 ft. to 128 ft. and in roadway width from 24 ft. to 72 ft. Skew effects are correlated for bridges of different widths, span lengths, number of beams, and number of design lanes, and empirical expressions are developed to facilitate computation of lateral load distribution factors for interior and exterior beams. The proposed skew distribution factors are actually based upon appropriate modifications to the distribution factors for right bridges. In general, the skew correction factor reduces the distribution factor for interior beams and increases the distribution factor for exterior beams. The magnitude of the skew effect is primarily a function of skew angle and of bridge span and beam spacing.
Live Load Distribution in Skewed Prestressed Concrete I-Beam and Spread Box-Beam Bridges
E. S. deCastro (author) / C. N. Kostem (author) / D. R. Mertz (author) / D. A. VanHorn (author)
1979
223 pages
Report
No indication
English
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