Analytical and Experimental Evaluation of Repairs to Continuous PC Girder Bridge
Publication: Journal of Performance of Constructed Facilities
Volume 34, Issue 1
Abstract
The Wanjiang Bridge, completed in 1976, is the first continuous prestressed concrete (PC) girder bridge erected using the incremental launching method in China. The bridge consists of prismatic separated dual box girders with an overall length of 136 m (). The bridge was hit by a tanker on August 5, 2006, and three supporting brackets near Pier 5 were severely damaged. An attempt was made to repair the bridge to recover its original strength. This study evaluated the effectiveness of the repairs, the postrehabilitation properties, and the strength of the damaged brackets and the bridge using static and dynamic field load tests and finite-element method (FEM) analyses. The results show that the finite-element (FE) model and the load tests provide a comprehensive evaluation of the behavior of the bridge structure. The accuracy and reliability of the FE model was investigated and validated through a field loading test. The field loading test and the computer simulation indicated that the original performance of the Wanjiang Bridge was restored and its strength satisfies the design requirements so that any vehicle with load of less than 30 t would be allowed to cross.
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Acknowledgments
The authors appreciate the financial support from the Natural Science Foundation of China (Grant No. 51778147), the Provincial Natural Science Fund of Zhejiang (Grant No. LY17E080022), the China Postdoctoral Science Foundation (Grant No. 2016M600352), and the Science and Technology Agency of Zhejiang province (Grant No. 2015C33222).
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Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 34 • Issue 1 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Oct 6, 2018
Accepted: May 1, 2019
Published online: Oct 30, 2019
Published in print: Feb 1, 2020
Discussion open until: Mar 30, 2020
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