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学者姓名：肖靖林
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Abstract ：
The normal service of reinforced concrete hollow-slab beams, which are widely used in small- and medium-span bridges, is a topic of interest. This paper presents an experimental study on four existing hollow-slab beams removed from a real bridge. The mechanical properties, including failure mode, load-deflection response, crack development and load-strain response, were investigated. Moreover, a fibre beam element-based model updating method was applied to these hollow-slab beams for material property parameter inversion and quantitative structural performance evaluation. The two-step model updating achieved accurate inversion of the material property parameters. The updated fibre beam element-based model can reproduce the load-deflection response and crack width development well, i.e., achieve quantitative structural performance evaluation, and can assist with further maintenance decisions such as designing a strengthening scheme. The results indicate that evaluating the ultimate capacity on the basis of stiffness is not very reliable because a member with greater stiffness may not always possess a greater ultimate capacity. The yield strength of steel bars is the predominant parameter of the ultimate capacity; thus, to evaluate the ultimate capacity, more attention should be given to assessing the yield strength of steel bars instead of testing the stiffness under a normal service load. Although the initial stiffness values of these existing hollow-slab beams decreased by 17 similar to 33 %, the beams exhibited high ductility, and their actual residual ultimate capacity values exceeded the design expectations by 7 similar to 10 %. In future bridge maintenance projects, the fibre beam element-based model updating method can be implemented with deflection and crack data from field static load tests to predict material property parameters and to quantitatively evaluate performance.
Keyword ：
Existing reinforced concrete (RC) bridge Existing reinforced concrete (RC) bridge Fibre beam element-based model Fibre beam element-based model Full-scale experiment Full-scale experiment Hollow-slab beam bridge Hollow-slab beam bridge Material property inversion Material property inversion Model updating Model updating Structural performance evaluation Structural performance evaluation
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| GB/T 7714 | Xiao, Jing-Lin , Liu, Yu-Fei , Feng, Hao-Long et al. Performance evaluation of existing reinforced concrete hollow-slab beams: Experiments and fibre beam element-based model updating [J]. | ENGINEERING STRUCTURES , 2025 , 326 . |
| MLA | Xiao, Jing-Lin et al. "Performance evaluation of existing reinforced concrete hollow-slab beams: Experiments and fibre beam element-based model updating" . | ENGINEERING STRUCTURES 326 (2025) . |
| APA | Xiao, Jing-Lin , Liu, Yu-Fei , Feng, Hao-Long , Nie, Jian-Guo . Performance evaluation of existing reinforced concrete hollow-slab beams: Experiments and fibre beam element-based model updating . | ENGINEERING STRUCTURES , 2025 , 326 . |
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Abstract ：
Ensuring the safety and reliability of common reinforced concrete hollow slab beam bridges through structural performance evaluations is crucial for maintaining highway system functionality, social stability, and economic prosperity. This paper presents field tests and a structural performance evaluation of an existing hollow slab beam bridge. First, a lateral load distribution test was conducted to reveal the lateral load distribution performance of this bridge. Second, a single-beam destructive test was conducted to investigate the structural performance of the hollow slab beams. A modified hinge-connected slab/beam method was presented to estimate the actual stiffnesses of hollow slab beams and hinge joints, revealing the lateral load distribution performance and damage distribution of the bridge. On the basis of the estimated actual stiffnesses and experimental data, the flexural stiffnesses and deflections of hollow slab beams under the serviceability limit state were evaluated. In addition, the applicability of the flexural stiffness formulas in JTG 3362-2018, AASHTO LRFD BDS and EN 1992-2 to the structural performance evaluation of existing bridges was assessed. Moreover, the formulas in these standards were adopted to estimate the bending capacities of hollow slab beams, and their applicability was also discussed. This study offers guidance for evaluating the structural performance of existing concrete bridges.
Keyword ：
Field test Field test Hollow slab beam Hollow slab beam Lateral load distribution Lateral load distribution Multiple-girder bridge Multiple-girder bridge Reinforced concrete (RC) Reinforced concrete (RC) Structural performance evaluation Structural performance evaluation
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Xiao, Jing-Lin , Liu, Yu-Fei , Feng, Hao-Long et al. Field tests and structural performance evaluation of existing reinforced concrete hollow slab beam bridges [J]. | ENGINEERING STRUCTURES , 2025 , 333 . |
| MLA | Xiao, Jing-Lin et al. "Field tests and structural performance evaluation of existing reinforced concrete hollow slab beam bridges" . | ENGINEERING STRUCTURES 333 (2025) . |
| APA | Xiao, Jing-Lin , Liu, Yu-Fei , Feng, Hao-Long , Nie, Jian-Guo . Field tests and structural performance evaluation of existing reinforced concrete hollow slab beam bridges . | ENGINEERING STRUCTURES , 2025 , 333 . |
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