Removal of Temporary Supports and Creep Effects in Sequential Construction of Bridges

Bridge structural concept is strictly related to the involved construction methods. Today's most common choice is a wide precasting technology application of on-site assembled reduced dimension elements. The elements' static schemes and strength characteristics generally change during construction. The structural configuration is modified through the use of provisional supports, introduction of delayed restraints, and connection, in subsequent stages, of different structural elements. The bridge's final behavior can be significantly influenced by such transient phases. The structural scheme can be forced toward a solution in which element functionality is optimized if the designer acts during the constructive stages. The authors report on a study about the influence of creep-induced delay strain on pressed bridge structural conception. There is evaluation and discussion of how the final solution is affected by support removal and additional restraints. Phenomena characterization is permitted, in the study, for possible simplifications to be defined, useful for simplified model development in the linear viscoelasticity and homogeneous structures hypothesis. These models use redistribution functions to allow elastic solutions use. The authors present an arch-portal bridge case study. Temporary pier removal after delayed restraint introduction, with a static scheme change from continuous beam to arch behavior, plays a fundamental role during construction.

• 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:
  • Arici, M
  • Granata, M F
• Publication Date: 2007-9

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References;
• Pagination: pp 37-52
• Monograph Title: Structural Implications of Shrinkage and Creep of Concrete

Subject/Index Terms

• TRT Terms: Arches; Bridge construction; Concrete; Creep; Deformation curve; Design; Dimensional analysis; Piers (Supports); Precast concrete; Strength of materials
• Uncontrolled Terms: Change; Configurations; Continuous beams; Delayed; Removal (Structures); Restraint; Static models; Temporary
• Subject Areas: Bridges and other structures; Construction; Design; Highways; Materials; I32: Concrete; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01081490
• Record Type: Publication
• ISBN: 0-87031-250-2
• Report/Paper Numbers: SP-246-3
• Files: TRIS
• Created Date: Nov 29 2007 7:11AM