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<p>Hinge joints are essential for transverse load transfer in hollow slab bridges. Damage to these joints leads to an unfavorable “single-slab load-bearing” condition. This paper proposes a novel method for assessing hinge joint damage based on lateral distribution influence lines (LDILs). First, a theoretical model incorporating pavement effects is established. LDILs are then extracted from finite element model (FEM) under varying damage levels, locations, and loading positions. Results demonstrate that the proposed method effectively identifies hinge joint damage locations and severities. Identification accuracy increases significantly when the load is applied near damaged hinges. The method is validated through laboratory experiments and field measurements on an in-service bridge. Field tests further confirm the method’s capability to detect damage distribution and evaluate rehabilitation effects. This study provides a practical approach for hinge joint damage assessment in hollow slab bridges.</p>

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Identification of hinge joints damage in hollow slab bridges based on lateral distribution influence line inversion

  • 期刊论文

  • 发表日期：

    2026年7月23日

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  • Haozhe Jiang,
  • Lili Yuan,
  • Ping Zhuge,
  • Zhiyu Jie

摘要

Hinge joints are essential for transverse load transfer in hollow slab bridges. Damage to these joints leads to an unfavorable “single-slab load-bearing” condition. This paper proposes a novel method for assessing hinge joint damage based on lateral distribution influence lines (LDILs). First, a theoretical model incorporating pavement effects is established. LDILs are then extracted from finite element model (FEM) under varying damage levels, locations, and loading positions. Results demonstrate that the proposed method effectively identifies hinge joint damage locations and severities. Identification accuracy increases significantly when the load is applied near damaged hinges. The method is validated through laboratory experiments and field measurements on an in-service bridge. Field tests further confirm the method’s capability to detect damage distribution and evaluate rehabilitation effects. This study provides a practical approach for hinge joint damage assessment in hollow slab bridges.