Publication

Repair of riveted bridge members damaged by fatigue using CFRP materials

Alain Nussbaumer, Andrea Bassetti
2000
Conference Papers

Abstract

A new technique using prestressed carbon fiber laminates (CFRP – Carbon Fiber Reinforced Polymers) is being developed to repair fatigue cracks or prevent fatigue cracking on riveted bridge members. High fatigue resistance and high tensile strength of carbon fibres allows the use of bonded CFRP-plates for crack patching. Prestressed CFRP-plates bonded on cracked steel sections slow down or stop completely crack propagation by acting in three different ways: (1) by increasing the stiffness of the cracked steel sections, (2) by reducing crack opening displacements at and behind the crack front and (3) by applying compressive stresses and producing a crack closure effect. The effectiveness of this technique is verified by a parametric study using small and full scale fatigue tests and numerical models.

Official source

https://infoscience.epfl.ch/entities/publication/892bc5b4-73a4-4aad-9764-bde723f7da59

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Alain Nussbaumer, Andrea Bassetti
2000
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/892bc5b4-73a4-4aad-9764-bde723f7da59

About this result

Related concepts (32)

Fatigue (material)

In materials science, fatigue is the initiation and propagation of cracks in a material due to cyclic loading. Once a fatigue crack has initiated, it grows a small amount with each loading cycle, typically producing striations on some parts of the fracture surface. The crack will continue to grow until it reaches a critical size, which occurs when the stress intensity factor of the crack exceeds the fracture toughness of the material, producing rapid propagation and typically complete fracture of the structure.

Carbon-fiber-reinforced polymers

Carbon fiber-reinforced polymers (American English), carbon-fiber-reinforced polymers (Commonwealth English), carbon-fiber-reinforced plastics, carbon-fiber reinforced-thermoplastic (CFRP, CRP, CFRTP), also known as carbon fiber, carbon composite, or just carbon, are extremely strong and light fiber-reinforced plastics that contain carbon fibers. CFRPs can be expensive to produce, but are commonly used wherever high strength-to-weight ratio and stiffness (rigidity) are required, such as aerospace, superstructures of ships, automotive, civil engineering, sports equipment, and an increasing number of consumer and technical applications.

Compressive strength

In mechanics, compressive strength (or compression strength) is the capacity of a material or structure to withstand loads tending to reduce size (as opposed to tensile strength which withstands loads tending to elongate). In other words, compressive strength resists compression (being pushed together), whereas tensile strength resists tension (being pulled apart). In the study of strength of materials, tensile strength, compressive strength, and shear strength can be analyzed independently.

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Repair of riveted bridge members damaged by fatigue using CFRP materials

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