Überführungsbauwerk der L3378 bei Fulda‐Lehnerz

Pelke, Eberhard; Jaborek, André; Berger, Dieter A.; Brühwiler, Eugen

doi:10.1002/best.201800050

Cited by 13 publications

(5 citation statements)

References 3 publications

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“…( 2009) (Denarié and Sajna, 2009), Japan (2014). (Kosaka et al, 2015), Austria (2015) (Hadl et al, 2015), the USA (2016) (Haber et al, 2017), and Germany (2017) (Pelke et al, 2018), all based on the Swiss UHPFRC concept of enhancement of existing bridges. UHPFRC has also been used to strengthen orthotropic steel decks in numerous countries such as in the Netherlands (2006) (Buitelaar et al, 2006) and in China since 2016 (Cao et al, 2016), where this concept has been used at least thirty times across twelve provinces (Shao et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

A Review of the Use of UHPFRC in Bridge Rehabilitation and New Construction in Switzerland

Bertola

Schiltz

Denarié

et al. 2021

Front. Built Environ.

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Ultra-High-Performance Fibre Reinforced Cementitious Composite (UHPFRC) provides solutions to enhance existing structures and design innovative new structures. Structural UHPFRC offers 3–5 times higher compressive and tensile strengths than ordinary concrete. Due to its strain-hardening behavior and dense matrix, structures made of UHPFRC remain crack-free and waterproof, guaranteeing durability. UHPFRC has been used particularly in Switzerland with more than 280 applications since 2003. A review of UHPFRC applications in the country is proposed in this paper. Ten bridge case studies are presented, including five strengthening of existing structures and five new designs. These structures were chosen to assess the multiple benefits that UHPFRC provides compared to traditional reinforced-concrete structures. Besides structural efficiency, several construction criteria are considered, such as construction costs, material durability, environmental impacts, and construction time. Structural rehabilitation made with UHPFRC leads to cost-effective interventions, and this material also helps to preserve heritage structures. Due to its specific mechanical properties, UHPFRC enables new structures with distinctive aesthetic designs with reduced construction time. The crucial contribution of research to the first case studies is also highlighted. This link between Swiss universities and the construction industry has quickly transitioned UHPFRC Technology from academic studies to real-world applications. Nowadays, the UHPFRC Technology is maturing and applications are common in the country.

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Section: Introductionmentioning

confidence: 99%

A Review of the Use of UHPFRC in Bridge Rehabilitation and New Construction in Switzerland

Bertola

Schiltz

Denarié

et al. 2021

Front. Built Environ.

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“…One very promising option is the use of overlays made of high-performance materials. For concrete floors and decks of, e.g., bridges with deficient bending and shear resistance, the application of a thin, and thus weight-reduced, layer of ultra-high performance fibre reinforced concrete (UHPFRC), instead of ordinary overlays with the same load-bearing capacity, decreases the dead load of the strengthened structure significantly [1][2][3][4][5][6]. At the same time, due to the very compact microstructure of ultra-high performance concrete (UHPC), the toppings or overlays made of UHPFRC slow down the diffusion of corrosive substances plus water absorption and enhance the freeze-thawing resistance and abrasion resistance of structures, so that the overall durability of the structure is enhanced significantly [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Shear Bond between Ultra-High Performance Fibre Reinforced Concrete Overlays and Normal Strength Concrete Substrates

Javidmehr

Empelmann

2021

Sustainability

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Strengthening or retrofitting of existing structures is a more sustainable and resource-efficient solution than replacing them with new constructions. To enhance the performance and effectiveness of strengthening works the use of high-performance materials is a promising method. Using ultra-high performance fibre reinforced concrete (UHPFRC) as supplementary concrete is one of such solutions leading to high structural resistance and better durability. For such UHPFRC overlays the shear bond resistance of the interface between the existing substrate, usually normal strength concrete (NSC), and the UHPFRC is a significant design aspect. This paper presents the results of push-off tests conducted on NSC-UHPFRC specimens, which were produced with different substrate treatment methods. Using different surface measurement techniques including the sand patch method and digital microscopy, the effects of substrate roughness and treatment method on shear bond behaviour and failure mechanisms are investigated, and the results are analysed with design approaches and further calculation models in the technical literature. Based on the results, the significance of considering roughness parameters and failure mode for the design of high-performance overlays is highlighted. Furthermore, the effectiveness of different substrate treatment methods is discussed and an effective treatment method is suggested.

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“…Figure17. Preparation of the in-situ concrete surface (left); drill core from a test area: normal concrete -UHPFRC -asphalt concrete -Bonding agent -asphalt concrete (right)[19] …”

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confidence: 99%

Potential of Ultra-High-Performance Concrete (UHPC) for Refurbishment of Bridges

Fehling

Thiemicke

2023

IOP Conf. Ser.: Earth Environ. Sci.

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In many countries, the bridge infrastructure suffers from damaged bridges that need to be rehabilitated or replaced. This means that the state or the institutions responsible for this must make extensive investments. Are there other ways to address the problems caused by the damaging effects of de-icing agents, by fatigue due to high vehicle loads and frequencies on the load side or by lack of fatigue strength of, for example, orthotropic bridge decks? Yes, UHPC surface courses can be used as a protective barrier against aggressive substances such as chlorides. They can also be load-bearing and contribute to improved bearing capacity while providing durability. In addition, a single layer can replace the foundation of multiple layers required for sealing and trafficability. The following article shows the potential of such UHPC layers for improving existing bridges, be they concrete or steel bridges.

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Überführungsbauwerk der L3378 bei Fulda‐Lehnerz

Cited by 13 publications

References 3 publications

A Review of the Use of UHPFRC in Bridge Rehabilitation and New Construction in Switzerland

A Review of the Use of UHPFRC in Bridge Rehabilitation and New Construction in Switzerland

Shear Bond between Ultra-High Performance Fibre Reinforced Concrete Overlays and Normal Strength Concrete Substrates

Potential of Ultra-High-Performance Concrete (UHPC) for Refurbishment of Bridges

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