Modeling and Prediction of Time-Dependent Deformations of the I-35W St. Anthony Falls Bridge

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

Abstract

To properly identify anomalous data in a structural monitoring system, the expected behavior of the structure under changing environmental conditions must be accurately determined. The St. Anthony Falls Bridge, a post-tensioned concrete box girder bridge, was examined as a case study for testing a data normalization scheme for temperature- and time-dependent deformations of an in situ structure. A methodology based on linear regression was developed to extract time-dependent behavior from the measured data. An Arrhenius-adjusted time was proposed to correct for the slowing and accelerating creep and shrinkage rates during the winter and summer, respectively. The extracted time-dependent deformations were compared to estimates using the finite element method. Bayesian regression was used to update the finite element model predictions using the measured data, substantially narrowing the expected bounds and facilitating anomaly detection.

Original languageEnglish (US)
Title of host publicationCONCREEP 2015
Subtitle of host publicationMechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures - Proceedings of the 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures
EditorsJohann Kollegger, Christian Hellmich, Bernhard Pichler
PublisherAmerican Society of Civil Engineers (ASCE)
Pages754-763
Number of pages10
ISBN (Electronic)9780784479346
DOIs
StatePublished - Jan 1 2015
Event10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures, CONCREEP 2015 - Vienna, Austria
Duration: Sep 21 2015Sep 23 2015

Publication series

NameCONCREEP 2015: Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures - Proceedings of the 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures

Other

Other10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures, CONCREEP 2015
Country/TerritoryAustria
CityVienna
Period9/21/159/23/15

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