OPTIMIZATION OF SPAN ARRANGEMENT FOR HIGHWAY BRIDGES
A PROCEDURE FOR THE OPTIMIZATION OF SPAN ARRANGEMENT FOR CONCRETE DECK AND STEEL STRINGER HIGHWAY BRIDGES HAS BEEN DEVELOPED IN THIS REPORT. THE PHYSICAL PROBLEM OF SPAN ARRANGEMENT DETERMINATION IS STATED AS A COMPLEX MATHEMATICAL PROGRAMMING PROBLEM WHICH CANNOT BE SOLVED BY KNOWN TECHNIQUES. BY REDEFINING VARIABLES, MAKING APPROXIAMTIONS BASED ON STRUCTURAL BEHAVIOR, AND ITERATING TO REINFORCE THE APPROXIMATIONS, THE SOLUTION TO THE COMPLEX PROBLEM IS OBTAINED BY SEARCHING THE OPTIMAL SOLUTIONS OF A NUMBER OF SIMPLER LINEAR PROGRAMMING PROBLEMS. THE STATIONS OF THE LINES OF SUPPORT, THE ANGLES THE LINES OF SUPPORT MAKE WITH A REFERENCE LINE, THE NUMBER OF SPANS, AND THE NUMBER OF GIRDERS ARE CONSIDERED AS THE DESIGN VARIABLES. THE MAIN CONSTRAINT CONDITIONS ARE THAT THE LINES OF SUPPORT MUST BE WITHIN CERTAIN SPECIFIED REGIONS AS DICTATED BY THE BRIDGE SITE. THE OBJECTIVE IS TO MINIMIZE A BRIDGE COST BASED ON THE VOLUME OF SUPERSTRUCTURE COMPONENTS, AND A COST PER UNIT LENGTH OF BRIDGE. STRUCTURAL ANALYSIS AND DESIGN APPROXIMATIONS ARE INTRODUCED TO REDUCE COMPUTATIONAL EFFORT, BUT THE OPTION OF A MORE VIGOROUS ANALYSIS IS INCLUDED. /AUTHOR/
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Supplemental Notes:
- Hpr, State NO R-10
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Corporate Authors:
Massachusetts Institute of Technology
Department of Civil Engineering, 77 Massachusetts Avenue
Cambridge, MA United States 02139Massachusetts Department of Public Works
100 Nashua Street
Boston, MA United States 02114Bureau of Public Roads /US
400 7th Street, SW
Washington, DC United States 20590 -
Authors:
- Latona, R W
- Publication Date: 1968-5
Subject/Index Terms
- TRT Terms: Approximation (Mathematics); Bridge decks; Bridge design; Bridge superstructures; Bridges; Concrete; Economics; Highway bridges; Mathematical analysis; Steel; Stringers; Structural analysis; Structural design
- Uncontrolled Terms: Bridge spans
- Subject Areas: Bridges and other structures; Economics; Highways;
Filing Info
- Accession Number: 00207878
- Record Type: Publication
- Source Agency: Bureau of Public Roads /US
- Files: TRIS
- Created Date: Nov 12 1994 12:00AM