01011204

Component

https://doi.org/10.3141/1914-11

http://scholar.google.com...ubat&publication_year=2005

The use of high-performance concrete (HPC) for transportation structures was the subject of a 3-year study that involved field investigation, laboratory experiments, analysis, and modeling. The field study involved instrumentation and analysis of six HPC bridge decks. The laboratory component characterized early-age thermal, shrinkage, creep, and cracking behaviors. A three-dimensional finite element model was used in conjunction with material models to analyze and predict creep and shrinkage behavior and to investigate structural and material interactions. This paper focuses on the field component of the project and discusses the instrumentation, deformation measurements, and analysis of bridge decks in Illinois. The bridges were instrumented to understand the development of shrinkage and thermal stress in concrete bridge decks with the use of various materials and structural components. The results indicate that the stress development due to daily temperature cycles and long-term temperature changes are relatively small compared with the stress development due to drying shrinkage. According to model simulations, a 15% to 40% reduction in shrinkage would reduce the stress level enough to prevent most cracking. Although drying shrinkage is the major driving force for stress development, the interaction of concrete shrinkage and structural restraint influences the magnitude of the stress and is linked to the propensity for early-age cracking.

01011203

English

pp 85-96

2005

Transportation Research Record: Journal of the Transportation Research Board

0309093872

Print

Figures (11) ; Photos (1) ; References (11) ; Tables (1)

Bridge decks; Cracking; Creep; Deformation; Field studies; Finite element method; High performance concrete; Instrumentation; Mathematical models; Shrinkage; Simulation; Thermal stresses

Illinois

Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete

TRIS, TRB, ATRI

Dec 16 2005 3:30PM

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