Volume 2 · Issue 4 (2025)
Long-Term Evaluation of Reinforcement Effectiveness for Old and Dilapidated Bridges Based on Load Testing
Manhui Liu
Zhejiang Academy of Transportation Sciences, Hangzhou 311305, Zhejiang, China
Abstract: This study investigates the residual load-bearing capacity of an old bridge five years post-strengthening. The bridge, a T-shaped rigid frame structure with suspended spans, was constructed in 1999. Due to significant deterioration, it was rated as a Class D (Structurally Deficient) bridge in 2018 and subse-quently strengthened. Post-reinforcement load tests conducted in 2019 con-firmed compliance with design requirements. In December 2023, follow-up load tests (including static and dynamic load testing) were performed to re-assess its performance. Results indicate a significant degradation in load-carrying capacity over the intervening period. This research provides valuable insights for long-term effectiveness evaluation of reinforcement techniques on aging bridges, contributing to ensuring structural safety and serviceability.
Keywords: Aging bridge Reinforcement; Load Testing; Load-bearing Capacity
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