THE EFFECTS OF LOADINGS ON BRIDGE LIFE
THIS STUDY ESTIMATES THE EFFECTS OF TRAFFIC LOADINGS ON THE FATIGUE LIFE OF LONGITUDINAL STRINGERS OF BRIDGES, BASED ON STRESS HISTORIES ACQUIRED AT CRUCIAL POINTS. A LIMITED LATERAL STRESS DISTRIBUTION STUDY WITH A SPECIAL TEST VEHICLE WAS CONDUCTED FOR VARIOUS SPEEDS AND LATERAL VEHICLE POSITIONS. EIGHT SPANS OF 8 COMPOSITE LONGITUDINAL STRINGER- SLAB TYPE BRIDGES WERE USED (2 WELDED PLATE GIRDERS, 5 ROLLED BEAM WITH TAPERED END COVER PLATED, AND 1 PRESTRESSED CONCRETE I-BEAM). THE REPORT INCLUDES FREQUENCY DISTRIBUTIONS OF MAXIMUM LIVE LOAD STRESS, REBOUND STRESS, LIVE LOAD STRESS RANGE, AND VEHICLE TYPE, ALSO BRIDGE DYNAMIC CHARACTERISTICS (NATURAL FREQUENCY DAMPING FACTORS, AND DECAY TIME), DYNAMIC AMPLIFICATION FACTORS AND DYNAMIC STRESS INCREMENTS FOR THE VARIOUS TEST VEHICLE SPEEDS, AND MISCELLANEOUS FREQUENCY DISTRIBUTION OF GROSS VEHICLE LOAD ON 2 BRIDGES AND GROSS VEHICLE LOAD ACCORDING TO TRUCK TYPE. THIS STUDY INDICATES THAT THE EFFECT OF CURRENT TRAFFIC LOADING ON BRIDGE LIFE IS INSIGNIFICANT, LIMITED, OF COURSE, BY THE PARTICULAR CHARACTERISTICS OF THE TEST STRUCTURES, TRUCK VOLUMES, TYPES AND LOAD DISTRIBUTIONS ENCOUNTERED, AND INTERPRETATION AND APPLICABILITY OF THE FATIGUE STRENGTH DATA (MUNSE-STALLMEYER) AND FAILURE CRITERIA (MINER'S HYPOTHESIS). /AUTHOR/
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Supplemental Notes:
- Paper sponsored by Committee on Field Testing of Bridges and presented at the 47th Annual Meeting. 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.
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Authors:
- Cudney, G R
- Publication Date: 1968
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: pp 35-71
- Monograph Title: Bridges
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Serial:
- Highway Research Record
- Issue Number: 253
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Bridge superstructures; Deformation curve; Dynamics; Failure; Fatigue (Physiological condition); I beams; Live loads; Load transfer; Loads; Plate girders; Stresses; Stringers; Traffic; Vehicles
- Uncontrolled Terms: Bridge spans; Dynamic characteristics; Loading
- Subject Areas: Bridges and other structures; Highways; Operations and Traffic Management; Vehicles and Equipment;
Filing Info
- Accession Number: 00208910
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Jan 23 1994 12:00AM