Time-Dependent Analysis of Posttensioned Bridge Hinge Curl
Publication: Journal of Bridge Engineering
Volume 22, Issue 2
Abstract
Accurate prediction of instantaneous and time-dependent deformation of superstructure in-span hinges is important for preventing a mismatch of bridge decks. Time-dependent deflection of in-span hinges hinge curl in posttensioned bridges depends on the construction sequence and the material time-dependent properties. Structural analysis software is an important tool for estimating time-dependent deformations. Computational modeling was conducted to calculate the hinge curl in posttensioned bridges considering two approaches, the spine model and the three-dimensional finite-element model. Both modeling approaches estimated well the actual deformation behavior of the bridges. Based on the measured and computational data, a new simple method is proposed in this study for estimating the hinge curl during and after construction. The computational results were in good agreement with those estimated using the proposed simple method. Parametric studies on the effect of geometrical changes revealed that horizontal curvature and skew angle have a minimal effect on hinge curl.
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Acknowledgments
This study was sponsored by Caltrans through Contract 65A0390. Special thanks are due to Kamal Sah, the Caltrans Research Program Manager in the initial part of the project, and to Hamid Ikram, the current Caltrans Research Program Manager, for their support and advice. The interest and comments of Marc Friedheim, Sue Hida, Juan Araya, and Don Nguyen-Tan of Caltrans are also much appreciated. The research team is indebted to the Caltrans structural representatives and other Caltrans field staff for their tremendous assistance. The authors specifically thank the following individuals for facilitating the data collection at different bridge sites: Houshang Alishahi; David Muwanes, Amir Hassoun, and Richard Julodow; Jack Rothaus, Joshua Burke, and John Lammers; Sam Singh and Raman Guraya; and Juan Torres and Purisimo Rosal.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 22 • Issue 2 • February 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Nov 19, 2015
Accepted: Jul 19, 2016
Published online: Sep 12, 2016
Published in print: Feb 1, 2017
Discussion open until: Feb 12, 2017
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