00183784

Component

http://onlinepubs.trb.org...r/1978/665v2/665v2-011.pdf

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

The Conestogo River Bridge is a three span continuous steel plate girder structure with a concrete deck longitudinally prestressed for full composite action. The design live loading was an upper-bound representation of all observed truck loadings in Ontario, and a grid analysis was used instead of the usual live load distribution factors. A new load factor method was employed, and deflection and impact values provided by the AASHTO Specifications were abandoned in favour of a dynamic analysis, resulting in a very flexible structure with low natural frequencies. Other features include the use of high strength bolts as shear connectors, and slab test panels designed for membrane action with greatly reduced reinforcing steel percentages. On the basis of full scale load tests, the advisability of the regular use of these features on future bridges is determined. The testing program was conducted using two test vehicles, each of which could be loaded to 890 kN (200 kips). Static tests indicate good correlation between analytical and experimental strains, with load distribution significantly better than predicted by AASHTO Specifications. Dynamic tests indicate that this very flexible bridge, with a first mode frequency below the usual range of commercial vehicle frequencies, behaves as anticipated. The valuable information obtained from this project is incorporated in the new Ontario Highway Bridge Design Code. /Author/

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, 1978.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

01489599

pp 90-98

1978

Transportation Research Record

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

0309026970

Print

Figures (14) ; Photos; References (11)

Bolts; Bridge decks; Bridge superstructures; Concrete; Dynamics; Girder bridges; Live loads; Reinforcing steel; Specifications; Static tests; Trucks

Bridge spans; Dynamic characteristics

Waterloo (Canada)

Waterloo (Canada)

Bridges and other structures; Highways; Motor Carriers

TRIS, TRB

Dec 12 1978 12:00AM

• A CRITICAL EXAMINATION OF THE WAVE EQUATION
• AERODYNAMIC STABILITY OF TWO CABLE-STAYED BRIDGES
• ANALYSIS AND TESTING OF A TRAPEZOIDAL BOX GIRDER BRIDGE
• 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
• 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