TY - GEN
T1 - Model B3.1 for multi-decade concrete creep and shrinkage
T2 - 3rd International Symposium on Life-Cycle Civil Engineering, IALCCE 2012
AU - Wendner, R.
AU - Bažant, Z. P.
AU - Hubler, M. H.
PY - 2012
Y1 - 2012
N2 - Recent comparisons with numerous data on excessive multi-decade deflections of segmentally erected prestressed box girder bridges revealed the need for recalibration of RILEM B3 model for creep and shrinkage of concrete. With this aim, data from 69 large bridge spans have already been collected at the time of writing but a joint effort of Northwestern University and RILEM TC-MDC. The NU-ITI Laboratory Database has been updated by new data from JSCE, Japan, and a large collection of datasets for modern concretes containing admixtures. Extensive sensitivity analysis of the dependence of model B3 parameters on the material composition and strength is presented. The laboratory data are weighted, with emphasis on long-time tests, particularly the 30-year laboratory tests of Brooks. Combined optimization of both the bridge and laboratory data leads to better formulae of model B3.1 for predicting creep and shrinkage parameters from material strength and composition.
AB - Recent comparisons with numerous data on excessive multi-decade deflections of segmentally erected prestressed box girder bridges revealed the need for recalibration of RILEM B3 model for creep and shrinkage of concrete. With this aim, data from 69 large bridge spans have already been collected at the time of writing but a joint effort of Northwestern University and RILEM TC-MDC. The NU-ITI Laboratory Database has been updated by new data from JSCE, Japan, and a large collection of datasets for modern concretes containing admixtures. Extensive sensitivity analysis of the dependence of model B3 parameters on the material composition and strength is presented. The laboratory data are weighted, with emphasis on long-time tests, particularly the 30-year laboratory tests of Brooks. Combined optimization of both the bridge and laboratory data leads to better formulae of model B3.1 for predicting creep and shrinkage parameters from material strength and composition.
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M3 - Conference contribution
AN - SCOPUS:84874528457
SN - 9780415621267
T3 - Life-Cycle and Sustainability of Civil Infrastructure Systems - Proceedings of the 3rd International Symposium on Life-Cycle Civil Engineering, IALCCE 2012
SP - 1407
EP - 1413
BT - Life-Cycle and Sustainability of Civil Infrastructure Systems - Proceedings of the 3rd International Symposium on Life-Cycle Civil Engineering, IALCCE 2012
Y2 - 3 October 2012 through 6 October 2012
ER -