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DTFH61-03-R-00113  \nPrepared for:  \nFederal Highway Administration Office of Acquisition Management  \n400 Seventh Street, S.W., Room 4410 Washington, DC 20590  \nSeptember 2005  \nTABLE OF CONTENTS  \nPROJECT SUMMARY ............................................................................................................. 1  \n1. INTRODUCTION .............................................................................................................3  \n1.1 State of the Problem and Background ...................................................................... 3  \n1.2 Objectives of the Study ............................................................................................. 5  \n1.3 Organization of the Report........................................................................................ 7  \n2. HISTORICAL BACKGROUND OF STEEL BRIDGES .................................................9  \n2.1 Superstructures........................................................................................................ 10  \n2.1.1 Temporary Bridges / Emergency Bridges....................................................... 10  \n2.1.2 Permanent Bridges .......................................................................................... 25  \n2.2 Substructures ........................................................................................................... 48  \n2.2.1 Prefabricated Steel Piers ................................................................................. 48  \n2.3 Bibliography ........................................................................................................... 49  \n3. ACCELERATED CONSTRUCTION – MINIMUM SYSTEM REQUIREMENTS .....50  \n3.1 Conventional Construction and Erection Techniques............................................. 53  \n3.1.1 Configurations of Modular Systems ............................................................... 53  \n3.1.2 Cost Effectiveness / Standardization .............................................................. 53  \n3.1.3 Conventional Fabrication Methods ................................................................. 54  \n3.1.4 Construction Issues Associated With Modular Bridge Systems..................... 54  \n3.1.5 Transportation and Erection Issues ................................................................. 58  \n3.1.6 Design Loads and 75-Year Service Life ......................................................... 60  \n3.1.7 Future Maintenance ........................................................................................ 61  \n4. NEW CONCEPTS FOR ACCELERATED BRIDGE CONSTRUCTION.....................62  \n4.1 Evaluation of Existing Systems .............................................................................. 62  \n4.2 New Systems Development .................................................................................... 69  \n4.2.1 Modular Cast-in-Place System ....................................................................... 69  \n4.2.2 Modular Precast System ................................................................................. 76  \n5. Optimization ....................................................................................................................79  \n5.1 Review of Global Optimization Methods ............................................................... 79  \n5.1.1 Review of methods and strategies................................................................... 79  \n5.1.2 Review of Work Related to Steel Section Optimization ................................ 82  \n5.2 Problem Formulation .............................................................................................. 83  \n5.2.1 Design Parameters .......................................................................................... 83  \n5.2.2 Design Objectives ..................................................................................","cbCaihdCRGFOL3Tk","https://ap.wps.com/l/cbCaihdCRGFOL3Tk","pdf",6613683,261,"English","# PROJECT SUMMARY\n# INTRODUCTION\n## State of the Problem and Background\n## Objectives of the Study\n## Organization of the Report\n# HISTORICAL BACKGROUND OF STEEL BRIDGES\n## Superstructures\n## Substructures\n## Bibliography\n# ACCELERATED CONSTRUCTION – MINIMUM SYSTEM REQUIREMENTS\n## Conventional Construction and Erection Techniques\n## Configurations of Modular Systems\n## Cost Effectiveness / Standardization\n# NEW CONCEPTS FOR ACCELERATED BRIDGE CONSTRUCTION\n## Evaluation of Existing Systems\n## New Systems Development\n# Optimization\n## Review of Global Optimization Methods\n## Problem Formulation\n## Optimization Strategies and Methodology Used\n# Optimization Results and Discussions\n## Studied Parameters and Limits Considerations\n## Presentation and Discussion of Results\n# CONCLUSIONS AND RECOMMENDATIONS\n## Conclusions\n## Recommendations","[{\"question\":\"What study scope does the final report cover?\",\"answer\":\"It covers prefabricated steel bridge systems, including historical background, accelerated construction requirements, new system concepts, optimization formulation and methods, and the resulting discussions plus conclusions and recommendations.\"},{\"question\":\"Which optimization techniques are addressed in the report?\",\"answer\":\"The report reviews global optimization methods and applies genetic algorithms (GA) and surrogate-based optimization (SBO) as part of the optimization strategy and methodology.\"},{\"question\":\"How is the accelerated bridge construction section organized?\",\"answer\":\"It is organized around conventional construction and erection techniques, including modular system configurations, cost effectiveness and standardization, fabrication methods, construction issues, transportation and erection issues, and design loads and 75-year service life considerations.\"}]","PREFABRICATED STEEL BRIDGE SYSTEMS FHWA SOLICITATION NO. DTFH61-03-R-00113 - Final Report - September 2005 | PDF",1792799215,658]