Design Optimization of a Continuous Railway Bridge With Prebent and Prestressed Composite Decks

In the past, a significant effort was made to research long-term behavior analysis of a kind of prebent and prestressed composite steel-concrete beam used extensively in simply supported railway bridge decks in Belgium, which have U- shaped cross sections and are trough type. Extensive experimental research has been performed in tandem for the Belgian steel-concrete prebent beams to very high performance concrete (VHPC) technique. VHPC's main advantage over the C50 concrete currently used is prestressing system loss decrease due to a significant creep deformation decrease. Development of realistic models for continuous railway bridge construction feasibility assessment by connecting such simple decks over intermediate supports was a research motivation. A paramount condition for railway bridge decks is no cracking under load, which implies devising, between the simply supported decks, a form of in situ connection prestressing. To be able to cope with multiple construction and loading phases for such a highly heterogeneous structure, a structural analysis program was developed. Beam-type displacement-based finite element analysis is the framework within which the structural analysis is performed. The superposition algorithm forms the basis of a step-by-step time-dependent analysis. The CEB-FIP MC 90 creep and shrinkage model was found to reproduce recorded laboratory creep and shrinkage test strains for the C80/95 VHPC and the C50/60 concrete of the singly supported decks. Yue and Taerwe's proposed two-function method's step-by-step time-dependent analysis accommodates creep recovery effects occurring at unloading. This paper's purpose is to present a continuous bridge with prebent and prestressed composite decks' construction phases design optimization study. There is analysis of the continuous bridge's long-term behavior's most influential parameters.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0870312502
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Staquet, S
  • Detandt, H
  • Espion, B
• Publication Date: 2007-9

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: pp 87-106
• Monograph Title: Structural Implications of Shrinkage and Creep of Concrete

Subject/Index Terms

• TRT Terms: Bridge decks; Composite materials; Construction; Cracking; Creep; Deformation; Design; Loads; Mathematical models; Optimization; Prestressing; Railroad bridges; Shrinkage
• Uncontrolled Terms: Parameters; Prestress losses; Steel concrete interface; Very high performance concrete
• Geographic Terms: Belgium
• Subject Areas: Bridges and other structures; Construction; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01082613
• Record Type: Publication
• ISBN: 0-87031-250-2
• Report/Paper Numbers: SP-246-6
• Files: TRIS
• Created Date: Dec 18 2007 11:30AM