00183783

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http://onlinepubs.trb.org...r/1978/665v2/665v2-010.pdf

https://scholar.google.co...owka&publication_year=1978

Bridge construction using open steel box girders and a concrete deck slab acting composite is aesthetically pleasing and ideally suited for grade separations and river crossings for spans varying between 21 m and 110 m (70 ft. and 360 ft.). Current design specifications for this construction, however, are considered to be incomplete and do not provide sufficient guidance during construction. In a number of cases, due to lack of bracings and/or diaphragms, excessive displacements have occurred during construction. To clarify this problem, a typical, single span, 2-lane bridge was extensively instrumented and tested. The purposes of the testing program was to investigate the behaviour of a torsionally stiff bridge during and after construction and to compare the experimental data with analytical results. The concrete deck, which was constructed with 0.3% isotropic reinforcement to comply with the AASHTO Specifications, was also monitored. Test data consisted of structural and reinforcing steel strains, deflections, reactions for construction, and live load and temperature effects. The experimental deck was constructed in two stages. A preliminary review of the data indicated that, for this bridge geometry, construction effects were within the predicted values as no excessive deflections or strains were observed. The concrete deck with the dramatically reduced reinforcement was adequate for modern highway traffic provided sufficient diaphragms were present. The overall structural behaviour can be accurately predicted by analysis and, with diaphragms present, can be analyzed by beam theory and proper load distribution factors.

This paper appeared in Transportation Research Record No. 665, Bridge Engineering, Volume 2. Proceeding of a conference conducted by the Transportation Research Board, September 25-27, 197Distribution, 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 reserved8.

01489599

pp 81-89

1978

Transportation Research Record

Bridge Engineering Conference, 1st, 1978, St Louis, Missouri, USA

0309026970

Print

Figures (13) ; Photos; References (5) ; Tables (3)

Box girders; Bridge decks; Bridge design; Bridge superstructures; Bridges; Concrete bridges; Deflection; Dislocation (Geology); Instrumentation; Live loads; Specifications; Strain (Mechanics); Structural design

Bridge spans; Trapezoidal girders

Bridges and other structures; Geotechnology; Highways; Materials

TRIS, TRB

Dec 12 1978 12:00AM

• A CRITICAL EXAMINATION OF THE WAVE EQUATION
• AERODYNAMIC STABILITY OF TWO CABLE-STAYED BRIDGES
• APPLICATION AND DESIGN OF PRESTRESSED DECK PANELS
• APPLICATION OF PREFABRICATED HOLLOW STEEL DECKS TO BRIDGE CONSTRUCTIONS
• CONCRETE CABLE-STAYED BRIDGES
• CONSIDERATIONS IN THE DEVELOPMENT OF AN EARLY WARNING VESSEL/BRIDGE COLLISION SYSTEM
• CURRENT PRACTICE IN DESIGN AND INSTALLATION OF DRIVEN PILES
• DEVELOPMENT OF A SIMPLIFIED METHOD OF LATERAL LOAD DISTRIBUTION FOR BRIDGE SUPERSTRUCTURES
• DYNAMIC RESPONSE OF A SINGLE TRACK RAILWAY TRUSS BRIDGE
• DYNAMIC RESPONSE OF BRIDGES
• ECONOMICAL STRUCTURES FOR LOW-VOLUME ROADS
• FATIGUE TESTS OF PRESTRESSED GIRDERS WITH BLANKETED AND DRAPED STRANDS
• INCREASING THE SEISMIC RESISTANCE OF EXISTING HIGHWAY BRIDGES
• LABORATORY AND FIELD STUDIES OF A PEDESTRIAN BRIDGE COMPOSED OF GLASS REINFORCED PLASTIC
• METHODS OF CALCULATION OF THE WIND-INDUCED RESPONSES OF SUSPENDED-SPAN BRIDGES
• MODEL STUDIES OF DOUBLE-CELL BOX GIRDER BRIDGE WITH INTERMEDIATE DIAPHRAGMS
• MULTIPLE SERVICE LEVEL BRIDGE RAILINGS--PERFORMANCE AND DESIGN CRITERIA
• PRACTICAL BRIDGE RETROFIT CONCEPTS TO REDUCE DAMAGE PRODUCED BY SEISMIC MOTIONS
• RECENT DEVELOPMENT OF CONSTRUCTION TECHNIQUES IN CONCRETE BRIDGES
• REDUCING THE RISK OF CATASTROPHIC BRIDGE FAILURES
• SEGMENTAL AND STAGE CONSTRUCTION OF PRESTRESSED CONCRETE BOX GIRDER BRIDGES
• SEGMENTAL BRIDGE CONSTRUCTION IN WESTERN EUROPE--IMPRESSIONS OF AN IRF STUDY TEAM
• STRUCTURAL PROBLEMS FOR THE MESSINA NARROWS BRIDGE
• SYSTEMS CONSTRUCTION TECHNIQUES FOR SHORT-SPAN CONCRETE BRIDGES
• TEST RESULTS FROM THE CONESTOGO RIVER BRIDGE
• THE DESIGN AND CONSTRUCTION OF THE NEW RIVER GORGE BRIDGE
• THE DEVELOPMENT OF THE ONTARIO HIGHWAY BRIDGE DESIGN CODE
• TRAFFIC LOADING OF LONG SPAN BRIDGES
• TRANSVERSE POST-TENSIONING OF LONGITUDINALLY LAMINATED TIMBER BRIDGE DECKS
• WEB STRESSES IN PRESTRESSED CONCRETE BRIDGE BEAMS HAVING DISCONTINUOUS TENDONS