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Effect of section geometry on development of shrinkage-induced deformations in box girder bridges
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Huang, Haidong, Garcia, Reyes, Guadagnini, Maurizio and Pilakoutas, Kypros (2017) Effect of section geometry on development of shrinkage-induced deformations in box girder bridges. Materials and Structures, 50 (5). 222. doi:10.1617/s11527-017-1090-y ISSN 1359-5997.
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WRAP-section-geometry-development-shrinkage-induced-deformations-box-girder-bridges-Garcia-2017.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1594Kb) | Preview |
Official URL: http://dx.doi.org/10.1617/s11527-017-1090-y
Abstract
Non-uniform shrinkage strains can lead to significant additional deflections in large box girder bridges, leading to serviceability problems. This article examines experimentally and analytically the effect of different cross-section geometries on the shrinkage camber of bridge box girders. Small-scale beams were tested to determine the development of shrinkage strains across the beams of depth. Parameters investigated include cross section thickness, drying conditions, and type of concrete mix. Based on the experimental results, inverse analysis is utilised to obtain a surface factor and a hydro-shrinkage coefficient. In this study, such vales are used to determine, for the first time, shrinkage-induced bending deformations of long-span bridges using a hydro-mechanical approach. The results are then used to examine numerically the effect of different section geometries on the development of shrinkage camber. It is shown that the analytical predictions match the experimental results with an accuracy of 85%. A further parametric study is carried out to investigate the effects of specimen geometry and ambient relative humidity. The hydro-mechanical approach is further validated using shrinkage field data from the 230 m two-span box girder Yiju River Bridge (China). The approach proposed in this study is expected to contribute towards improving the predictions of the long term behaviour of box girder bridges and towards better bridge management.
| Item Type: | Journal Article | ||||||||
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| Subjects: | T Technology > TG Bridge engineering | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
| Library of Congress Subject Headings (LCSH): | Box girder bridges | ||||||||
| Journal or Publication Title: | Materials and Structures | ||||||||
| Publisher: | Springer | ||||||||
| ISSN: | 1359-5997 | ||||||||
| Official Date: | October 2017 | ||||||||
| Dates: |
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| Volume: | 50 | ||||||||
| Number: | 5 | ||||||||
| Article Number: | 222 | ||||||||
| DOI: | 10.1617/s11527-017-1090-y | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 20 March 2019 | ||||||||
| Date of first compliant Open Access: | 26 March 2019 | ||||||||
| RIOXX Funder/Project Grant: |
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