Mean stress effect and fatigue crack closure in material from old bridge erected in the late 19th century

Lesiuk, Grzegorz; Sire, Stéphane; Ragueneau, Muriel; Correia, José A.F.O.; Pedrosa, Bruno; Jesus, Abílio M.P. De

doi:10.1016/j.prostr.2019.08.027

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…However, it should be assumed that the reinforcement will work equally effectively in the post-operational state of the structure as well as after normalization, and the key elements of the research are the numerical analyses that allow for the correct design of the process to retard the development of fatigue-fracture by reducing the crack-like defect stress intensity factors (SIF). After the numerical part, fatigue crack growth laboratory tests were carried out on "hybrid" modified CT (Compact Tension)-metal-puddle iron (with comparable properties to the metal used in corrosion tests from the object tested in the work [13]) with adhesive and carbon fiber reinforced polymer (CFRP).…”

Section: Methodsmentioning

confidence: 99%

Minimal Invasive Diagnostic Capabilities and Effectiveness of CFRP-Patches Repairs in Long-Term Operated Metals

Lesiuk

Pedrosa

Zięty

et al. 2020

Metals

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The paper deals with the subject of diagnostics and the quick repairs of long-term operated metallic materials. Special attention was paid to historical materials, where the structure (e.g., puddle iron) is different from modern structural steels. In such materials, the processes of microstructural degradation occur as a result of several decades of exposure, which could overpass 100 years. In some cases, their intensity can be potentially catastrophic. For this reason, the search for minimally invasive diagnostic methods is ongoing. In this paper, corrosion and fracture toughness tests were conducted, and the results of these studies were presented for two material states: post-operated and normalized (as a state “restoring” virgin state). Moreover, through the use of modern numerical methods, composite crack-resistant patches have been designed to reduce the stress intensity factors under cyclic loads. As a result, fatigue lifetime was extended (propagation phase) by more than 300%.

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Section: Methodsmentioning

confidence: 99%

Minimal Invasive Diagnostic Capabilities and Effectiveness of CFRP-Patches Repairs in Long-Term Operated Metals

Lesiuk

Pedrosa

Zięty

et al. 2020

Metals

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“…This is especially important because old metallic riveted bridges were not originally designed with this phenomenon in mind (Akesson 2010;Mohammad 2002). Only recently, scientific studies have been conducted to evaluate the fatigue behavior of materials used in these structures (wrought-iron, puddle iron, or mild steels) (De Jesus et al 2015, 2011Lesiuk et al 2019;Pedrosa et al 2019). The most feasible method to assess the fatigue strength of materials and components is to perform experimental fatigue tests on structural details extracted from old metallic bridges.…”

Section: Introductionmentioning

confidence: 99%

Reliability of Fatigue Strength Curves for Riveted Connections Using Normal and Weibull Distribution Functions

Pedrosa

Correia

Rebelo

et al. 2020

ASCE-ASME J. Risk Uncertainty Eng. Syst., Part A: Civ. Eng.

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In North America and Europe, there is a significant number of centenary metallic bridges that require maintenance and strengthening operations. These structures need to be adapted to increasing traffic intensities, and their structural integrity should be constantly evaluated. Fatigue damages were not considered in the original design of old metallic bridges, and riveted connections are one of the most frequent sources of fatigue damages on these structures. This paper intends to be a contribution for the reliable assessment of the fatigue behavior of riveted connections by proposing S-N curves for these structural details. Experimental fatigue data is analyzed from multiple bridges across Europe, and different statistical methods were implemented. A normal distribution function was implemented following the ISO 12107 standard, and the results were compared with the implementation of the two-parameter Weibull distribution function. Different estimation methodologies were implemented to determine the parameters of the Weibull distribution. S-N curves obtained by the statistical analysis were then compared with design recommendations from North American and European standards.

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Fatigue performance prediction of S235 base steel plates in the riveted connections

et al. 2021

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Mean stress effect and fatigue crack closure in material from old bridge erected in the late 19th century

Cited by 4 publications

References 14 publications

Minimal Invasive Diagnostic Capabilities and Effectiveness of CFRP-Patches Repairs in Long-Term Operated Metals

Minimal Invasive Diagnostic Capabilities and Effectiveness of CFRP-Patches Repairs in Long-Term Operated Metals

Reliability of Fatigue Strength Curves for Riveted Connections Using Normal and Weibull Distribution Functions

Fatigue performance prediction of S235 base steel plates in the riveted connections

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