00399173

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http://onlinepubs.trb.org...s/trr/1984/982/982-006.pdf

https://scholar.google.co...rray&publication_year=1984

The results of the first three phases of a research project to study the behavior of a prestressed steel beam-concrete slab bridge unit specifically designed for county road use are presented. The units are constructed by steel fabricators in an upsidedown position, trucked to the site, and turned over and set in one operation. During fabrication, heavy steel forms are hung from the beams and their weight plus the weight of the concrete provide the prestressing. The advantages of this type of construction are that it requires less structural steel, less reinforcing steel, and less concrete for the deck. In addition, because the units are prefabricated, the labor force and the construction time at the job site are reduced. Data are presented on concrete, reinforcing bar and steel beam strains, and vertical displacements for a 1-year period of observation with the unit under sustained loading. Behavior of the unit when subjected to 500,000 cycles of repeated loading is described. Data from a static 50 percent overload test are also presented. The test unit performed satisfactorily, and county road bridges are currently being constructed in Oklahoma using three or four of the units. An additional 2-year period of sustained load observation followed by static tests to failure is planned.

Publication of this paper sponsored by Committee on Steel Bridges. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01419860

pp 36-42

1984

Transportation Research Record

0309037646

Print

Figures (10) ; References (1) ; Tables (1)

Accelerated tests; Beams; Bridges; Composite structures; Concrete; Dislocation (Geology); Oversize loads; Prefabricated structures; Prestressing; Reinforcing steel; Repeated loads; Slabs; Steel; Strain (Mechanics)

Overloads; Steel beams

Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls

TRIS, TRB

Jan 31 1986 12:00AM

• EARTHQUAKE PRECURSERS AND POTENTIAL DAMAGE IN THE UNITED STATES (ABRIDGMENT)
• FOUNDATION DESIGN: WEST SEATTLE BRIDGE
• HORIZONTALLY CURVED I-GIRDER BRIDGE ANALYSIS: V-LOAD METHOD
• OVERVIEW OF THE PENNSYLVANIA STANDARD PLANS FOR LOW-COST BRIDGES
• PERFORMANCE OF SLIDING BRIDGE BEARINGS
• PRESTRESSED CONCRETE HIGHWAY BRIDGES IN THE FEDERAL REPUBLIC OF GERMANY--CONSTRUCTION METHODS AND EXPERIENCES
• SEASONAL AND DIURNAL BEHAVIOR OF CONCRETE BOX-GIRDER BRIDGES
• TEMPERATURE PROBLEM IN A PRESTRESSED BOX-GIRDER BRIDGE
• TENSION ARCH STRUCTURE