Probabilistic Analysis of Prestress Loss due to Creep in Concrete Box Girders
Publication: Journal of Bridge Engineering
Volume 22, Issue 12
Abstract
The cross-section warping effect and warping-induced long-term prestress loss due to creep are investigated in this paper. Both phenomena were analyzed deterministically and stochastically. The random character of concrete creep and environmental factors have substantial effects on the statistical scatter of the total prestress loss. To obtain the real development of concrete long-term performance, sophisticated models for concrete creep and shrinkage prediction were used. The Monte Carlo–Latin hypercube sampling method was applied to capture the statistical variability of boundary and environmental conditions. It is shown that the severity of cross-section warping can be important, particularly in the case of short spans and unevenly distributed and isolated tendons in a cross section. The three-dimensional effects and the statistical variability of creep are considered to enable reliable design of box girder bridges.
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Acknowledgments
Financial support from the Grant Agency of the Czech Republic (Grant 16-04454 S) is gratefully acknowledged.
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Published In
Journal of Bridge Engineering
Volume 22 • Issue 12 • December 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Nov 23, 2015
Accepted: Mar 8, 2017
Published online: Sep 20, 2017
Published in print: Dec 1, 2017
Discussion open until: Feb 20, 2018
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