Assessment and Management of Concrete Bridges Supported by Monitoring Data-Based Finite-Element Modeling
Publication: Journal of Bridge Engineering
Volume 19, Issue 6
Abstract
The long-term assessment of large and complex civil infrastructures, such as prestressed concrete bridges, based on finite-element (FE) modeling remains a challenging task. The construction process, the influence of erection methods, the characterization of concrete properties, geometric accuracy, and environmental conditions are key factors involved in the development of robust FE models. Data collected using permanently installed monitoring systems is the most reliable strategy to improve such assessments. The availability of monitoring data are increasingly being used in the validation of design assumptions, updating of FE models, and safety factors. In this work, the long-term behavior of a long segmental bridge built in Portugal (Lezíria Bridge) is evaluated using FE model updating. The combination of several factors, including (1) the bridge’s scale, (2) the monitoring database, (3) the comprehensive scanning of important characteristics of the bridge, and (4) the FE modeling approach, makes this case study unique. Although the sensor trends are satisfactorily predicted, extrapolation of shrinkage and creep models, the influence of interior and exterior environments, and thickness variations of the structural elements are identified as areas for further research.
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Acknowledgments
The writers acknowledge the support from the Portuguese Foundation for Science and Technology through the PhD grant SFRH/BD/25339/2005 attributed to the first author. Support from the contractor consortium, Tace, and the infrastructure owner, BRISA, are also gratefully acknowledged.
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Published In
Journal of Bridge Engineering
Volume 19 • Issue 6 • June 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jan 5, 2013
Accepted: Jan 16, 2014
Published online: Feb 10, 2014
Published in print: Jun 1, 2014
Discussion open until: Jul 10, 2014
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