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Load capacity of jack arch bridges

Author: David B Beal; New York (State). Engineering Research and Development Bureau.
Publisher: Albany, N.Y. : New York State Dept. of Transportation, Engineering Research and Development Bureau, [1985]
Series: Research report / Engineering Research and Development Bureau, 129
Edition/Format:   Print book : State or province government publication : EnglishView all editions and formats
Summary:
A 76-year-old jack-arch bridge was tested to failure to obtain information on load capacity and the degree of composite action between the steel beams and concrete deck. This work was started because despite the good condition of the majority of the 1300 jack-arch bridges in New York, load-rating estimates indicate that they are inadequate to support modern highway traffic. The 39-ft-span test structure consisted of  Read more...
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Material Type: Government publication, State or province government publication
Document Type: Book
All Authors / Contributors: David B Beal; New York (State). Engineering Research and Development Bureau.
OCLC Number: 13170351
Notes: In cooperation with the Federal Highway Administration.
"December 1985."
Description: v, 34 pages : illustrations, charts ; 28 cm.
Contents: Introduction --
Results and discussion --
Application to load rating --
Conclusion --
References --
Appendix A: Measured flange strains --
Appendix B: Data analysis procedures.
Series Title: Research report / Engineering Research and Development Bureau, 129
Responsibility: David B. Beal.

Abstract:

A 76-year-old jack-arch bridge was tested to failure to obtain information on load capacity and the degree of composite action between the steel beams and concrete deck. This work was started because despite the good condition of the majority of the 1300 jack-arch bridges in New York, load-rating estimates indicate that they are inadequate to support modern highway traffic. The 39-ft-span test structure consisted of six 24-in. deep I-beams spaced at 36 in. Instrumentation consisted of electrical-resistance strain gages on both flanges at midspan, end-rotation measurements devices at the ends of two beams, and deflectometers at midspan. The bridge was loaded to produce a 6-ft region of constant moment at the center of the span. Loads were applied through hydraulic jacks reacting against grouted anchors beneath the structure.

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