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Shear behaviors of hollow slab beam bridges strengthened with high-performance self-consolidating cementitious composites
Highlights A novel shear strengthening method of hollow slab beam bridges was proposed. Filling HSCC effectively enhances the shear capability and stiffness of hollow-core slabs. The proposed method can improve transverse connections of hollow slab bridges.
Abstract A novel strengthening method was proposed to improve the shear behaviors of hollow slab beam bridges through filling the hollow with high-performance self-consolidating cementitious composites. The strengthening effect was evaluated through a field loading experiment and long-term monitoring. Some important parameters were compared and analyzed before and after the strengthening, including the principal stress of the bridge web, the strain response of beam bottom, the mid-span deflection and the transverse connection between the beams. The experimental results showed that the principal stress of the bridge was decreased by more than 50% compared with that before the strengthening. Under different loading conditions, the strain response of each slab beam bottom was decreased in different degrees, with a reduction range between 20% and 60%. The mid-span deflection of the bridge decreased by 10%-25% after the strengthening. Through the analysis of the transverse distribution of the strain on the beam bottom, the strengthening method also improved the lateral connection of the bridge in a certain extent. In addition, it was found that the long-term effectiveness of the strengthening method is verified through more than a year of monitoring.
Shear behaviors of hollow slab beam bridges strengthened with high-performance self-consolidating cementitious composites
Highlights A novel shear strengthening method of hollow slab beam bridges was proposed. Filling HSCC effectively enhances the shear capability and stiffness of hollow-core slabs. The proposed method can improve transverse connections of hollow slab bridges.
Abstract A novel strengthening method was proposed to improve the shear behaviors of hollow slab beam bridges through filling the hollow with high-performance self-consolidating cementitious composites. The strengthening effect was evaluated through a field loading experiment and long-term monitoring. Some important parameters were compared and analyzed before and after the strengthening, including the principal stress of the bridge web, the strain response of beam bottom, the mid-span deflection and the transverse connection between the beams. The experimental results showed that the principal stress of the bridge was decreased by more than 50% compared with that before the strengthening. Under different loading conditions, the strain response of each slab beam bottom was decreased in different degrees, with a reduction range between 20% and 60%. The mid-span deflection of the bridge decreased by 10%-25% after the strengthening. Through the analysis of the transverse distribution of the strain on the beam bottom, the strengthening method also improved the lateral connection of the bridge in a certain extent. In addition, it was found that the long-term effectiveness of the strengthening method is verified through more than a year of monitoring.
Shear behaviors of hollow slab beam bridges strengthened with high-performance self-consolidating cementitious composites
Yang, Jing (author) / Hou, Peng (author) / Pan, Yong (author) / Zhang, Honglei (author) / Yang, Caiqian (author) / Hong, Wan (author) / Li, Kefeng (author)
Engineering Structures ; 242
2021-05-22
Article (Journal)
Electronic Resource
English
High performance self-consolidating cementitious composites
| TIBKAT | 2018
| British Library Online Contents | 2014