Bridge load testing and damage evaluation using model updating method

• Published in: Engineering structures Vol. 252; p. 113648
• Main Authors: Abedin, Mohammad, De Caso y Basalo, Francisco J., Kiani, Nafiseh, Mehrabi, Armin B., Nanni, Antonio
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-02-2022; Elsevier BV
• Subjects: Adjacent box girder; Bearing strength; Box beams; Bridge decks; Bridge loads; Bridge performance; Carrying capacity; Cracking (fracturing); Damage assessment; Damage detection; Dynamic loads; Finite element analysis; Finite element method; Live load testing; Live loads; Load; Load carrying capacity; Load distribution; Load distribution (forces); Load tests; Model updating; Precast concrete bridge; Structural health monitoring; Adjacent box girder; Bridge performance; Finite element analysis; Damage detection; Precast concrete bridge; Live load testing
• ISSN: 0141-0296; 1873-7323
• DOI: 10.1016/j.engstruct.2021.113648

•The performance of a full-depth precast-prestressed box-beam bridge is investigated.•A new damage detection method for the bridges with precast deck panels is introduced.•The proposed method can effectively identify potential deck joint damage.
In this paper, the performance of a precast-prestressed box-beam bridge that had been in service for more than 50 years was investigated using a series of static and dynamic load tests. The bridge was instrumented to record individual panel deflections under live loads. A detailed finite element (FE) model was developed for better understanding the bridge behavior with suspected damage at deck panel joints. A comparison between the results of the FE model and actual bridge response confirmed damage at the deck longitudinal joints, also inferred by the observation of reflective cracking on the deck surface. Using the FE analysis and load testing results, a new damage detection method for structural health monitoring of these bridges with precast deck panels was introduced. This method can effectively identify locations and significance of potential deck joint damage based on the measured changes in bridge response and model updating. The results showed that such joint damage affects the bridge integrity, alters the live load distribution, and can potentially reduce the bridge load-carrying capacity.