Improved Assessment Methods for Static and Fatigue Resistance of Old Metallic Railway Bridges

Crémona, Christian; Eichler, B; Johansson, Bertil; Larsson, Tobias

doi:10.1061/(asce)be.1943-5592.0000466

Cited by 25 publications

(19 citation statements)

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“…For the old Portuguese metallic bridges built with old materials -puddle irons and medium steels -their monotonic mechanical properties, chemical composition, microstructures, as well as, fatigue properties can be found in refs. [8,9]. The brittle nature of such materials is strongly associated with its significant amount of slags and impurities as well as the susceptibility for microstructural degradation processes, mainly in steels with < 0.1%C content and with low content of Si.…”

Section: Introductionmentioning

confidence: 99%

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Fatigue resistance curves for single and double shear riveted joints from old portuguese metallic bridges

Pedrosa

Correia

Rebelo

et al. 2019

Engineering Failure Analysis

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The maintenance and safety of ancient bridges is a major concern of governmental authorities. In particular, the safety of old riveted bridges fabricated and placed into service at the end of the 19th century deserves particular attention. These structures are susceptible to exhibit high fatigue damage levels due to their long operational period with increasing traffic intensity associated to an original design not covering the fatigue phenomenon. This paper reviews recent fatigue behaviour investigations on single and double shear riveted joints performed by Universities of Porto (Portugal), Trás-os-Montes e Alto Douro (Portugal), and Wrocław (Poland), in particular concerning the fatigue characterization of riveted joints extracted from representative Portuguese riveted bridges, namely the Eiffel, Luiz I, Fão, Pinhão and Trezói bridges. In order to overcome the influence of scatter and establish a reliable assessment for the obtained experimental data, two statistical approaches were used: implement linearized boundaries following the recommendation in ASTM E739 standard and defining probabilistic SeN fields using the Castillo & Fernández-Canteli model. This statistical analysis allows to propose design SeN curves for single and double riveted joints and evaluate the applicability (safety) of using the design curves suggested in Eurocode 3 as well as design curves proposed by Taras and Greiner.

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Section: Introductionmentioning

confidence: 99%

“…Fatigue phenomenon occur in areas where geometric discontinuities (or imperfections) origin high levels of stress concentration leading to the appearance of cracks [9,14]. This subject was initially investigated by Whöler and Spangenberg during the 19th Table 1 Chemical composition of puddle iron and mild low-carbon steel.…”

Section: Introductionmentioning

confidence: 99%

Fatigue resistance curves for single and double shear riveted joints from old portuguese metallic bridges

Pedrosa

Correia

Rebelo

et al. 2019

Engineering Failure Analysis

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“…In the framework of this paper, the mean value of the ultimate tensile strength and the yield stress are assigned to each hotspot. Then, to estimate the fatigue variability at each critical location, Equations (8)- (13) have been employed. Fig.…”

Section: Notch Stress Estimationmentioning

confidence: 99%

“…This process is known as multiple-site damage [3]. Recently, research has been done in order to assess the reliability of riveted structural details and bridge structures [13]. Based on the test data available in the literature, also new fatigue classes were proposed according to their proneness to fatigue failure [14].…”

Section: Introductionmentioning

confidence: 99%

Reliability-based fatigue life estimation of shear riveted connections considering dependency of rivet hole failures

2018

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Standards and guidelines for the fatigue design of riveted connections make use of a stress range-endurance (S-N) curve based on the net section stress range regardless of the number and the position of the rivets. Almost all tests on which S-N curves are based, are performed with a minimum number of rivets. However, the number of rivets in a row is expected to increase the fail-safe behaviour of the connection, whereas the number of rows is supposed to decrease the theoretical stress concentration at the critical locations, and hence these aspects are not considered in the S-N curves. This paper presents a numerical model predicting the fatigue life of riveted connections by performing a system reliability analysis on a double cover plated riveted butt joint. The connection is considered in three geometries, with different number of rivets in a row and different number of rows. The stress state in the connection is evaluated using a finite element model in which the friction coefficient and the clamping force in the rivets are considered in a deterministic manner. The probability of failure is evaluated for the main plate, and fatigue failure is assumed to be originating at the sides of the rivet holes, the critical locations, or hot-spots. The notch stress approach is applied to assess the fatigue life, considered to be a stochastic quantity. Unlike other system reliability models available in the literature, the evaluation of the probability of failure takes into account the stochastic dependence between the failures at each critical location modelled as a parallel system, which means considering the change of the state of stress in the connection when a ligament between two rivets fails. A sensitivity study is performed to evaluate the effect of the pretension in the rivet and the friction coefficient on the fatigue life.

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“…In the particular case of composite and steel railway bridges, fatigue is one of the main causes of severe damage [1][2][3][4]. The relevance of this topic is reflected by the increasing number of numerical and experimental fatigue damage assessment studies performed on railway bridges [5][6][7][8][9][10][11][12]. In this context, local models for fatigue analysis have been gaining popularity with respect to the classical nominal S-N approaches [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

An efficient methodology for fatigue damage assessment of bridge details using modal superposition of stress intensity factors

Albuquerque

Silva

Jesus

et al. 2015

International Journal of Fatigue

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Improved Assessment Methods for Static and Fatigue Resistance of Old Metallic Railway Bridges

Cited by 25 publications

References 1 publication

Fatigue resistance curves for single and double shear riveted joints from old portuguese metallic bridges

Fatigue resistance curves for single and double shear riveted joints from old portuguese metallic bridges

Reliability-based fatigue life estimation of shear riveted connections considering dependency of rivet hole failures

An efficient methodology for fatigue damage assessment of bridge details using modal superposition of stress intensity factors

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