Fatigue strength of corroded bolted connection

Zampieri, Paolo; Curtarello, Andrea; Pellegrino, Carlo; Maiorana, Emanuele

doi:10.3221/igf-esis.43.06

Cited by 14 publications

(12 citation statements)

References 14 publications

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“…Zampieri [17] studied the fatigue strength of bolted connections, which indicates that corrosion can influence the fatigue life of the joint. Moreover, extended studies were done by Zampieri et al [18,19] that showed the degradation of the corroded bolted joint due to pitting corrosion. Besides, relevant studies suggested that the pitting flaw initiated by corrosion could be regarded as the source of fatigue cracking [14,16,20].…”

Section: Literature Reviewmentioning

confidence: 89%

Corrosion-Fatigue Evaluation of Uncoated Weathering Steel Bridges

2019

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Uncoated weathering steel (UWS) bridges have been extensively used to reduce the lifecycle cost since they are maintenance-free and eco-friendly. However, the fatigue issue becomes significant in UWS bridges due to the intended corrosion process utilized to form the corrodent-proof rust layer instead of the coating process. In this paper, an innovative model is proposed to simulate the corrosion-fatigue (C-F) process in UWS bridges. Generally, the C-F process could be considered as two relatively independent stages in a time series, including the pitting process of flaw-initiation and the fatigue crack propagation of the critical pitting flaw. In the proposed C-F model, Faraday’s law has been employed at the critical flaw-initiation stage to describe the pitting process, in which the pitting current is applied to reflect the pitting rate in different corrosive environments. At the crack propagation stage, the influence of pitting corrosion is so small that it can be safely ignored. In simulating the crack propagation stage, the advanced NASGRO equation proposed by the NASA is employed instead of the classic Paris’ law, in which a modified fatigue limit is adopted. The fatigue limit is then used to determine the critical size of pitting flaws, above which the fatigue effect joins as a parallel driving force in crack propagation. The model is then validated through the experimental data from published articles at the initiation stage as well as the whole C-F process. Two types of structural steel, i.e., HPS 70W and 14MnNbq steel, have been selected to carry out a case study. The result shows that the C-F life can be notably prolonged in the HPS 70W due to the enhancement in fatigue strength and corrosion resistance. Besides, a sensitivity analysis has been made on the crucial parameters, including the stress range, stress ratio, corrosive environment and average daily truck traffic (ADTT). The result has revealed the different influence of the above parameters on the initiation life and propagation life.

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Section: Literature Reviewmentioning

confidence: 89%

Corrosion-Fatigue Evaluation of Uncoated Weathering Steel Bridges

2019

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“…The Bayesian updating is considered to be one of the probabilistic methods for updating the existing probability distribution by reflecting the inspection data of the bridge [12]. Moreover, it can be expressed as Equation 3.…”

Section: General Bayesian Updatingmentioning

confidence: 99%

“…These days, the bridge deterioration model based on regression analysis is conducted to derive an efficient maintenance method for bridge management system in advanced countries, such as the USA, Japan, and Australia [1][2][3]. Domestic and foreign research trends related to bridge maintenance denote that they have focused on estimating the bridge performance changes with high accuracy through monitoring technologies based on unmanned inspection devices (sensors, drones, or robots) and by establishing an optimal maintenance decision making process system [4][5][6][7][8][9][10][11][12][13][14][15]. In addition, Bayesian deterioration model updating for maintenance cost estimation in steel box girder bridges has been proposed [16].…”

Section: Introductionmentioning

confidence: 99%

Maintenance Cost Estimation in PSCI Girder Bridges Using Updating Probabilistic Deterioration Model

et al. 2019

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A deterioration model plays an important role to predict the valid total maintenance cost for sustainable maintenance of bridges. In the current state-of-the-art, the deterioration model has regression parameters as a probabilistic process by an initially determined mean and standard deviation, called an existing model. However, the existing model has difficulty to predict maintenance costs accurately, because it cannot reflect an information based on structural damage at an operational stage. In this research, updating the probabilistic deterioration model is presented for the prediction of pre-stressed concrete I-type (PSCI) girder bridges using a particle filtering technique which is an advanced Bayesian updating method based on big data analysis. The method enables predicting maintenance cost fitted in the current structural status, which includes the recent information by inspection with bridge-monitoring. The method is adapted in the Mokdo Bridge which is currently being used for evaluating the efficiency of maintenance cost by effects on updated probabilistic values with two different scenarios. As the result, it is shown that the proposed method is effective in predicting maintenance costs.

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“…He observed that the failure was caused by the combination of a missing interior weld, a ductile tear, and fatigue cracking. Zampieri et al have investigated the influence of the corrosive phenomenon on the fatigue strength of a friction type joint made of high strength preloaded bolts [3]. They observed that the accelerated corrosion process applied to the specimens caused a not negligible reduction of the fatigue strength of joints.…”

Section: Introductionmentioning

confidence: 99%

“…Considering a behavior-damage coupling of the material, finite element numerical simulations were carried out on XC65 steel pipes with pitting in the axial direction. Depending on the size of the corrosion defect (length and width) [3].for a depth equal to 10% of the pipe wall thickness, the critical or dangerous area where the equivalent Von Mises stress is maximal is determined by the finite element code ANSYS [7]. The calculation of the crack initiation conditions in the critical area is obtained from the history of strain components taken as the output of the finite element calculation.…”

Section: Introductionmentioning

confidence: 99%

Behavior and damage of a pipe in the presence of a corrosion defect depth of 10% of its thickness and highlighting the weaknesses of the ASME / B31G method

Berrekia

Benzerga²,

Haddi

2019

Frattura Ed Integrità Strutturale

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The company DRC (pipe repair Department) located within the SONATRACH Company of oil and gas in Algeria, which is responsible for the repair of pipelines for the transport of gas or crude petroleum, will rehabilitate old pipes that have operated on-line for approximately 30 years or come from remaining projects. On the assumption that rehabilitating a pipeline means making it workable under the same conditions as a new structure and reducing the overall cost of the project. The abandonment of these tubes will have an important environmental and financial impact. The rehabilitation, which consists of recovering the maximum of tube, already used, therefore reduces the cost of the project. Inspection and evaluation of corrosion defects are carried out in accordance with ASME/31G method that is applied to low alloyed carbon steels with corrosion defects having soft profiles with low stress concentration. Our research will consist in developing a method using a behavior-damage coupling of the material to highlight the weaknesses of the ASME / B31G method [1] and show for defects whose depth does not exceed 10%, these defects can survive hydrostatic testing but will develop during service when the pressure is variable.

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Fatigue strength of corroded bolted connection

Cited by 14 publications

References 14 publications

Corrosion-Fatigue Evaluation of Uncoated Weathering Steel Bridges

Corrosion-Fatigue Evaluation of Uncoated Weathering Steel Bridges

Maintenance Cost Estimation in PSCI Girder Bridges Using Updating Probabilistic Deterioration Model

Behavior and damage of a pipe in the presence of a corrosion defect depth of 10% of its thickness and highlighting the weaknesses of the ASME / B31G method

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