Publication

UHPFRC technology to enhance the performance of existing concrete bridges

Eugen Brühwiler
2020
Journal Articles

Abstract

‘Structural UHPFRC’ stands for Ultra-High Performance Fibre Reinforced Cementitious Composite material, that is, complemented by reinforcing steel bars forming a R-UHPFRC layer with the goal to enhance the resistance and durability of structural elements in reinforced concrete. This technical paper is intended to serve for the design of enhancement of reinforced concrete bridges. After summarizing the properties of UHPFRC and R-UHPFRC in terms of structural performance, analytical design rules are presented to calculate the increase in structural resistance of structural elements strengthened with a layer of R-UHPFRC. Three applications related to the design and execution of the enhancement of three existing concrete bridges including the three most common cross sections, that is, box girder, multiple beam girder and massive slab, are described with emphasis of conceptual design aspects, main results of design and main features of execution of the UHPFRC work.

Official source

https://infoscience.epfl.ch/entities/publication/99086fde-bf1c-4a55-b5c9-15503047d53d

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Eugen Brühwiler
2020
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/99086fde-bf1c-4a55-b5c9-15503047d53d

About this result

Related concepts (19)

Reinforced concrete

Reinforced concrete, also called ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials.

Prestressed concrete

Prestressed concrete is a form of concrete used in construction. It is substantially "prestressed" (compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. This compression is produced by the tensioning of high-strength "tendons" located within or adjacent to the concrete and is done to improve the performance of the concrete in service. Tendons may consist of single wires, multi-wire strands or threaded bars that are most commonly made from high-tensile steels, carbon fiber or aramid fiber.

Structural engineering

Structural engineering is a sub-discipline of civil engineering in which structural engineers are trained to design the 'bones and muscles' that create the form and shape of human-made structures. Structural engineers also must understand and calculate the stability, strength, rigidity and earthquake-susceptibility of built structures for buildings and nonbuilding structures. The structural designs are integrated with those of other designers such as architects and building services engineer and often supervise the construction of projects by contractors on site.

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