Misprediction of long-time deflections of prestressed box girders: Causes, remedies and tendon layout effect

V. Křístek*, L. Vráblík, Zdenek P Bazant, G. Hua Li, Q. Yu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

The paper reviews the causes of under-estimation of the long-time future deflections of large-span prestressed concrete box girder bridges. Six causes are discussed: 1) wrong creep and shrinkage model; 2) obsolete creep analysis method; 3) ignoring randomness; 4) lack of model updating based on short-time tests; 5) wrong tendon layout; and 6) neglect of shear lag. The present paper focuses on the last two causes, while a brief review of the other causes is planned for the conference presentation. So is a discussion of why the record-span Koror-Babeldaob Bridge in Palau deflected 1.1m more than expected in design.

Original languageEnglish (US)
Title of host publicationCreep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures - Proceedings of the 8th Int. Conference on Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures
Pages1291-1295
Number of pages5
Volume2
StatePublished - Dec 1 2009
Event8th International Conference on Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures - Ise-Shima, Japan
Duration: Sep 30 2008Oct 2 2008

Other

Other8th International Conference on Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures
CountryJapan
CityIse-Shima
Period9/30/0810/2/08

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials

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