The B4 model for multi-decade creep and shrinkage prediction

R. Wendner, M. H. Hubler, Z. P. Bažant

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

35 Scopus citations

Abstract

Presented is a new model, labeled B4, which can overcome some of the shortcomings of the CEB-fib, ACI, JSCE and GL prediction models for concrete creep and shrinkage. The B4 model represents an extension and systematic recalibration of the theoretically founded model B3, a 1995 RILEM recommendation. In addition to introducing the so far missing separation of autogenous and drying shrinkage, model B4 takes into account the cement type and admixture parameters, as well as the effects of various types of aggregate. The new predictors for the creep compliance function more accurately, capture the composition information, and are recalibrated to match the multi-decade behavior. This behavior has recently been documented by observed deflection records of many bridges, which is evidence that has so far been systematically underestimated. The improved model was calibrated through a joint optimization of a new, significantly enlarged database of laboratory creep and shrinkage tests and a new database of bridge deflection records.

Original languageEnglish (US)
Title of host publicationMechanics and Physics of Creep, Shrinkage, and Durability of Conrete
Subtitle of host publicationA Tribute to Zdenek P. Bazant - Proceedings of the 9th Int. Conf. on Creep, Shrinkage, and Durability Mechanics, CONCREEP 2013
PublisherAmerican Society of Civil Engineers (ASCE)
Pages429-436
Number of pages8
ISBN (Print)9780784413111
DOIs
StatePublished - Jan 1 2013
Event9th International Conference on Creep, Shrinkage, and Durability Mechanics: A Tribute to Zdenek P. Bazant, CONCREEP 2013 - Cambridge, MA, United States
Duration: Sep 22 2013Sep 25 2013

Publication series

NameMechanics and Physics of Creep, Shrinkage, and Durability of Conrete: A Tribute to Zdenek P. Bazant - Proceedings of the 9th Int. Conf. on Creep, Shrinkage, and Durability Mechanics, CONCREEP 2013

Other

Other9th International Conference on Creep, Shrinkage, and Durability Mechanics: A Tribute to Zdenek P. Bazant, CONCREEP 2013
CountryUnited States
CityCambridge, MA
Period9/22/139/25/13

ASJC Scopus subject areas

  • Mechanics of Materials
  • Building and Construction

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  • Cite this

    Wendner, R., Hubler, M. H., & Bažant, Z. P. (2013). The B4 model for multi-decade creep and shrinkage prediction. In Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete: A Tribute to Zdenek P. Bazant - Proceedings of the 9th Int. Conf. on Creep, Shrinkage, and Durability Mechanics, CONCREEP 2013 (pp. 429-436). (Mechanics and Physics of Creep, Shrinkage, and Durability of Conrete: A Tribute to Zdenek P. Bazant - Proceedings of the 9th Int. Conf. on Creep, Shrinkage, and Durability Mechanics, CONCREEP 2013). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784413111.051