Flexural Strengthening of Large-Scale Damaged Reinforced Concrete Bridge Slab using UHPC Layer with Different Interface Techniques
This paper investigated the flexural behavior of large-scale damaged reinforced concrete (RC) bridge slab strengthened with the ultra-high performance concrete (UHPC) layer at the tensile side. The RC slabs were preloaded under flexure to introduce cracks. The pre-damage degree was evaluated using the crack width at the highest load. Then, two types of interface technique of the RC substrate were conducted before strengthening of the UHPC layer. The first technique was a combination of embedded studs and rough surface (S-R) on the RC substrate. The second technique was rough surface (R) only. Experimental results indicated that the UHPC layer enhanced the flexural capacity and stiffness of the damaged RC slab. The UHPC layer also restrained and delayed the crack development in the RC and UHPC layers. It should be highlighted that the strengthened slab with the S-R interface technique exhibited significant mechanical performance compared with the interface treated using the R technique only. Therefore, the enhanced flexural performance of the UHPC-RC slab using the S-R technique may have an impact on the analysis and design of strengthening large-scale damaged RC bridge slab.
Y. Zhu et al., "Flexural Strengthening of Large-Scale Damaged Reinforced Concrete Bridge Slab using UHPC Layer with Different Interface Techniques," Structure and Infrastructure Engineering, Routledge, Jan 2021.
The definitive version is available at https://doi.org/10.1080/15732479.2021.1876104
Civil, Architectural and Environmental Engineering
INSPIRE - University Transportation Center
Keywords and Phrases
Bridge slab; experimental analysis; flexural strengthening; interface techniques; large-scale damaged reinforced concrete; studs; ultra-high performance concrete
International Standard Serial Number (ISSN)
Article - Journal
© 2021 Routledge, All rights reserved.
01 Jan 2021