A probabilistic multi-scale time dependent model for corroded structural suspension cables

Elachachi, Sidi Mohammed; Breysse, Denys; Yotte, Sylvie; Crémona, Christian

doi:10.1016/j.probengmech.2005.10.006

Cited by 39 publications

(14 citation statements)

References 19 publications

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“…The upper hook is incapable of completing the grab in section CE. The grabbing condition should be judged using equation (1). As the hooks slid along the wall surface from top to bottom, the grabbing is successful in regards to the case of equation (1).…”

Section: Judgment Condition For Bionic Claw Grasping Steadily Bulges mentioning

confidence: 99%

A rough concrete wall-climbing robot based on grasping claws

Fei

Shen

et al. 2016

International Journal of Advanced Robotic Systems

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Climbing robots have been widely used to inspect smooth walls. However, a good adsorption method has not been found for the inspection of a cliff surface and a dusty high-altitude surface with small vibration, both of which are made of coarse concrete, square brick, or rock. In this article, first, we analyzed the bionic structure of the cockroach legs and observed their morphological characteristics of the spiny claws on these legs. We also studied the interaction theory of the bionic claw with the bulges on the rough wall surfaces and deduced the mechanical criteria of the claws grabbing steadily these bulges. Then, an initial mechanical structure of a wall-climbing robot was proposed based on a grasping claw and a climbing model. Furthermore, a mathematical model was established to reflect the relationship between sharp hooks and bulges on the rough wall. Finally, we performed several laboratory experiments to verify the grasping stability.

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Section: Judgment Condition For Bionic Claw Grasping Steadily Bulges mentioning

confidence: 99%

A rough concrete wall-climbing robot based on grasping claws

Fei

Shen

et al. 2016

International Journal of Advanced Robotic Systems

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“…Figure 1 depicts a typical elasto-plastic tensile behaviour with scattered ultimate strain. A simple elastoplastic constitutive law is used to describe the stressstrain relationship of corroded steel wires (Elachachi et al, 2006):…”

Section: Mechanical Properties Of Corroded Wiresmentioning

confidence: 99%

“…However, many cables have never been inspected or have been partially inspected due to limitations of current inspection techniques (acoustic, visual, etc. ) (Elachachi, Breysse, Yotte, & Cremona, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Toribio et al (2011) developed a conceptual framework of fracture mechanics analyses that enabled the determination of stress states at the crack front, which is a useful method to assess the integrity of such components under different environmental conditions. Elachachi et al (2006) attempted to develop a probabilistic multi-scale time-dependent model and studied cable behaviour to distinguish the wire, strand, and cable scales, with a complete decoupling among these scales. Toribio and Ovejero (1997), Pennington, Van Raemdonck, Matlock, and Krauss (2011) and Yang, Bae, and Park (2009) investigated the most important factors affecting the mechanical properties and fracture response of steel wires.…”

Section: Introductionmentioning

confidence: 99%

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Probabilistic deterioration model of high-strength steel wires and its application to bridge cables

Zhu

et al. 2014

Structure and Infrastructure Engineering

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Bridge inspections reveal that severe corrosion and fatigue are the main failure mechanisms of bridge stay cables. This paper presents an empirical modelling of the long-term deterioration process of steel wires in cables with consideration of the simultaneous occurrence of uniform corrosion, pitting corrosion and fatigue induced by a combined action of environmental aggression and cyclic loading. Accelerated corrosion experiments are conducted to determine the different corrosion levels of high-strength steel wires, and time-dependent statistical models are developed to quantify uniform and pitting corrosion depth. Corrosion-fatigue process of steel wires is subsequently simulated using the corrosion models and cyclic stress obtained through cable force monitoring data. The mechanical properties of corroded steel wires, including yield stress, ultimate stress, ultimate strain and modulus of elasticity, are experimentally characterised, and the statistical models are established through regression analysis. Finally, the deterioration models of high-strength steel wires (including crack depth, ratio of broken wires, and remaining strength, among others) is extended to probabilistically assess the time-variant conditions of bridge cables (sectional area loss and remaining capacity). The presented study on the long-term deterioration of bridge cables would provide guidance to future decision-making regarding the maintenance and replacement of bridge cables.

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“…[13][14][15]; the continuum damage model is also a useful tool to analyze the engineering failure problems [16,17]; unfortunately, damage variables in the continuum damage mechanics lack of explicit physical meaning and are not easily measured through experiments. Furthermore, probabilistic fatigue models [18][19][20], such as the combined probabilistic physics-of-failure-based method, the probabilistic time-dependent method, etc., have been proposed and applied to take the uncertainties and time-varying features into consideration. However, these methods were mainly developed for engineering problems at macroscale, whereas recent investigations showed that fracture failure may start from the microscopic scale and gradually spread to the macroscopic scale [21].…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Fatigue Life Prediction of Bridge Cables Based on Multiscaling and Mesoscopic Fracture Mechanics

2016

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Fatigue fracture of bridge stay-cables is usually a multiscale process as the crack grows from micro-scale to macro-scale. Such a process, however, is highly uncertain. In order to make a rational prediction of the residual life of bridge cables, a probabilistic fatigue approach is proposed, based on a comprehensive vehicle load model, finite element analysis and multiscaling and mesoscopic fracture mechanics. Uncertainties in both material properties and external loads are considered. The proposed method is demonstrated through the fatigue life prediction of cables of the Runyang Cable-Stayed Bridge in China, and it is found that cables along the bridge spans may have significantly different fatigue lives, and due to the variability, some of them may have shorter lives than those as expected from the design.

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A probabilistic multi-scale time dependent model for corroded structural suspension cables

Cited by 39 publications

References 19 publications

A rough concrete wall-climbing robot based on grasping claws

A rough concrete wall-climbing robot based on grasping claws

Probabilistic deterioration model of high-strength steel wires and its application to bridge cables

Probabilistic Fatigue Life Prediction of Bridge Cables Based on Multiscaling and Mesoscopic Fracture Mechanics

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