VEHICLE LOADINGS AND BRIDGE DESIGN
THIS PAPER PROVIDES A CRITICAL REVIEW OF THE PRESENT STATE OF THE ART OF HIGHWAY BRIDGE DESIGN WITH PARTICULAR REFERENCE TO VEHICLE LOADS AND BASES FOR DESIGN. THE AUTHORS POINT OF VIEW IS THAT OF THE DESIGN OF A TRANSPORTATION SYSTEM. IT IS ARGUED THAT BRIDGE DESIGN LOADINGS AND LICENSING REGULATIONS SHOULD REFLECT AN OPTIMUM SOLUTION OF THE JOINT PROBLEM OF ECONOMICS AND TECHNICAL DESIGN. IT IS RECOGNIZED THAT ORDINARY TRUCK COMBINATIONS ARE TENDING TO BECOME LONGER AND HEAVIER. HEAVY LOADS, NOW COVERED ONLY UNDER SPECIAL PERMIT, SHOULD BECOME PART OF THE DESIGN REGIME. THE PROBLEM OF BASES FOR DESIGN IS CONSIDERED WITH A REQUIREMENT FOR SUBSTANTIAL INCREASES IN NOMINAL LOAD CARRYING CAPACITY. BRIDGES SHOULD BE DESIGNED ON TWO BASES' THAT OF PLASTIC ULTIMATE STRENGTH FOR VERY HEAVY VEHICLES OPERATING UNDER CONTROLLED CONDITIONS, AND THAT OF REPEATED LOADING - FATIGUE STRENGTH FOR LESSER LOADS. BRIDGES SHOULD BE MADE TO BEHAVE MORE AS THREE DIMENSIONAL STRUCTURES. CONSIDERING THIS ASPECT, THE COMBINATION OF GREATLY INCREASED DESIGN LOADS WITH MORE RATIONAL DESIGN BASES WOULD PROBABLY NOT LEAD TO VERY GREAT INCREASES IN COSTS. /CGRA/
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Supplemental Notes:
- pp 378-386, 11 REF
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Authors:
- Wright, D T
- Manniche, K
- Publication Date: 1965-9-27
Media Info
Subject/Index Terms
- TRT Terms: Accelerated tests; Bridge design; Bridge engineering; Bridges; Costs; Deflection; Design engineering; Design load; Fatigue (Physiological condition); Highway bridges; Impacts; Load limits; Mathematical models; Oversize loads; Overweight loads; Regulation; Repeated loads; Residual stress; Safety; Size and weight regulations; Specifications; State of the art studies; Static loads; Stress (Psychology); Stresses; Structural design; Transportation; Ultimate load design; Ultimate strength; Vehicle weight; Vibration
- Uncontrolled Terms: Design specifications; Transportation systems
- Old TRIS Terms: Bridge dynamics
- Subject Areas: Bridges and other structures; Design; Safety and Human Factors; Transportation (General);
Filing Info
- Accession Number: 00208161
- Record Type: Publication
- Files: TRIS
- Created Date: Jul 29 1994 12:00AM