Verification of the Reinforcement Effect of an SFRC Pavement under a Live Load Based on Visualization of Deformation of a Trough Rib of an Orthotropic Steel Deck Using MEMS IMUs and Contact Displacement Gauges
Publication: Journal of Bridge Engineering
Volume 27, Issue 5
Abstract
Because repetitive high strain caused by complicated deformation due to traffic load leads to fatigue damage in an orthotropic steel deck, reinforcement methods that suppress deformation are effective as a countermeasure. In Japan, a steel fiber–reinforced concrete (SFRC) pavement is often used as reinforcement to suppress deformation by improving the stiffness of the deck plate of the orthotropic steel deck. To appropriately evaluate the suppression of deformation, it is important to compare the deformation before and after reinforcement. In this study, the reinforcement effects of an SFRC pavement were verified based on visualizations of the deformation of a trough rib of an in-service orthotropic steel deck bridge before and after reinforcement by such a pavement. The visualization results showed that the deformation of the trough rib midway between the transverse ribs decreased after reinforcement, and the strain ranges at the weld joints between the deck plate and the trough rib decreased by approximately 18.5%–31.1%. On the other hand, at the intersection of the transverse rib, it was confirmed that the rotations of the lower flange of the trough rib increased after reinforcement. Accordingly, as inferred from the visualization results for the trough rib, the strain range of the web of the trough rib on the left side at the upper slit and that of the deck plate on the right side at the upper slit after reinforcement increased by approximately 10.6% and 47.5%, respectively.
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Acknowledgments
This research was supported by JIPS KAKENHI Grant Number JP17K14717. This study was carried out as part of cooperative research with Metropolitan Expressway (Tokyo), Shutoko Engineering (Tokyo), and the Shutoko Technology Center (Tokyo). The planning and implementation of the field measurements were supported by Mr. Omiya of the Shutoko Technology Center and Mr. Tsukada of Shutoko Engineering. The field measurements using the MEMS sensors were supported by Seiko Epson (Nagano, Japan). In advancing this research, President Miki of Tokyo City University gave us valuable advice.
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Information & Authors
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Published In
Journal of Bridge Engineering
Volume 27 • Issue 5 • May 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Apr 30, 2021
Accepted: Jan 14, 2022
Published online: Mar 15, 2022
Published in print: May 1, 2022
Discussion open until: Aug 15, 2022
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Cited by
- Zhan Jin, Zhijuan Li, Junxi Wang, Research Progress on Fatigue Reinforcement of Orthotropic Steel Deck, Highlights in Science, Engineering and Technology, 10.54097/hset.v10i.1223, 10, (31-38), (2022).