Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Structural Reinforcement of Specimen Bridge Columns with HPFRC
The preservation of existing bridges, many of which were constructed over 50 years ago, is crucial for the future development of road networks in many Western countries. These bridges often fail to meet modern loading requirements and seismic resistance standards, affecting their operability and safety. Current regulations emphasize cataloguing existing bridges and identifying critical structures in need of structural rehabilitation. Among various intervention techniques, the use of fiber-reinforced concrete (FRC), particularly high-performance fiber-reinforced concrete (HPFRC), is gaining popularity due to its superior performance, application speed, and simplicity. This paper presents the results of an EU-funded project focused on the repair of two road bridges in Italy using HPFRC. The successful implementation involved applying jacketing to the bridge piers and girders, which were heavily damaged by corrosion, using a new HPFRC layer with a reduced thickness of 40–60 mm and limited steel reinforcement. Laboratory tests conducted at the University of Brescia on scaled column specimens yielded promising results, showing an increase in the load-bearing capacity of the columns under lateral loading by up to 100%, with moderate effects on the stiffness of the existing structure. The paper suggests that although HPFRC has demonstrated significant structural benefits, its broader environmental implications must be considered.
Structural Reinforcement of Specimen Bridge Columns with HPFRC
The preservation of existing bridges, many of which were constructed over 50 years ago, is crucial for the future development of road networks in many Western countries. These bridges often fail to meet modern loading requirements and seismic resistance standards, affecting their operability and safety. Current regulations emphasize cataloguing existing bridges and identifying critical structures in need of structural rehabilitation. Among various intervention techniques, the use of fiber-reinforced concrete (FRC), particularly high-performance fiber-reinforced concrete (HPFRC), is gaining popularity due to its superior performance, application speed, and simplicity. This paper presents the results of an EU-funded project focused on the repair of two road bridges in Italy using HPFRC. The successful implementation involved applying jacketing to the bridge piers and girders, which were heavily damaged by corrosion, using a new HPFRC layer with a reduced thickness of 40–60 mm and limited steel reinforcement. Laboratory tests conducted at the University of Brescia on scaled column specimens yielded promising results, showing an increase in the load-bearing capacity of the columns under lateral loading by up to 100%, with moderate effects on the stiffness of the existing structure. The paper suggests that although HPFRC has demonstrated significant structural benefits, its broader environmental implications must be considered.
Structural Reinforcement of Specimen Bridge Columns with HPFRC
RILEM Bookseries
Beushausen, Hans (Herausgeber:in) / Ndawula, Joanitta (Herausgeber:in) / Alexander, Mark (Herausgeber:in) / Dehn, Frank (Herausgeber:in) / Moyo, Pilate (Herausgeber:in) / Reggia, Adriano (Autor:in) / Trabucchi, Ivan (Autor:in) / Beltracchi, Ivan (Autor:in) / Morbi, Alessandro (Autor:in) / Plizzari, Giovanni A. (Autor:in)
International Conference on Concrete Repair, Rehabilitation and Retrofitting ; 2024 ; Cape Town, South Africa
01.11.2024
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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