Abstract
This paper introduces a method of strengthening prestressed concrete continuous box-girder bridges with prestressed steel strands. Construction process monitoring, field load tests before and after reinforcement, and health monitoring after reinforcement were performed to verify the effectiveness of the external prestressed steel strand reinforcement method. During the construction monitoring process, the measured values of each tensioning step are basically consistent with the theoretical values, but the measured values are slightly less than the theoretical values. The results of the field load tests show that the bending strength and stiffness of the strengthened girder have been improved. During health monitoring, the strain value and deflection value data for some parts across the specified section were collected. According to the data, the strain and deflection values fluctuated within the specified limit, and the bridge was always in a safe state.
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Data Availability Statement
All data, models, and code generated or used during this study appear in the published article.
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Published In
Journal of Performance of Constructed Facilities
Volume 36 • Issue 2 • April 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Feb 9, 2021
Accepted: Sep 20, 2021
Published online: Jan 5, 2022
Published in print: Apr 1, 2022
Discussion open until: Jun 5, 2022
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