A Methodology for Fatigue Reliability Assessment Considering Stress Range Distribution Truncation

Park, Jun Yong; Park, Yeun Chul; Kim, Ho-Kyung

doi:10.1007/s13296-018-0104-0

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…Therefore, the PDF is expressed by Eqn. 23, where the m n constants  im of the i -th variable are calculated from the available information about the moments of the distribution. Commonly, the Lagrange multipliers are obtained from the solution of a nonlinear system of algebraic equations.…”

Section: General Framework Of Mep Applied To Known Support and Moment...mentioning

confidence: 99%

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Multi-level Uncertain Fatigue Analysis of a Truss under Incomplete Available Information

Nonato

2023

Frattura Ed Integrità Strutturale

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We predict the fatigue life of a planar tubular truss when geometrical parameters, material properties, and live loads are non-deterministic. A multi-level calculation uncertainty quantification framework code was designed to aggregate the finite element method and fatigue-induced sequential failures. Due to the incompleteness of the aleatory-type inputs, the maximum entropy principle was applied. Two sensitivity analyses were performed to report the most influencing factors. In terms of variance, the results suggest that the slope of the curve crack growth rate × stress intensity factor range is the most influencing factor related to fatigue life. Furthermore, due to the application of the entropy concept, the fatigue crack growth boundaries and fatigue crack size boundaries obtained provide the most unbiased fatigue crack design mapping. These boundaries allow the designer to select the worst-case fatigue scenario, besides being able to predict the crack behavior at a required confidence level.

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Section: General Framework Of Mep Applied To Known Support and Moment...mentioning

confidence: 99%

“…In other words, to account only for the effective stress cycles, we will adopt the strategy applied in [23], which discards the non-contributors' stress cycles from the analysis. Therefore, the threshold of the stress range, rth S , is given by Eqn.…”

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Multi-level Uncertain Fatigue Analysis of a Truss under Incomplete Available Information

Nonato

2023

Frattura Ed Integrità Strutturale

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Fatigue reliability assessment and life-cycle cost analysis of roadway bridges equipped with weigh-in-motion systems

Sacconi

Venanzi

Ierimonti

et al. 2022

Structure and Infrastructure Engineering

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Life-cycle cost analysis of bridges subjected to fatigue damage

Sacconi

Ierimonti

Venanzi

et al. 2021

J Infrastruct Preserv Resil

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Life-cycle cost analysis (LCCA) is a decision-making tool particularly useful for the design of bridges as it predicts lifetime expenses and supports the inspections management and the maintenance activities. LCCA allows to consider uncertainties on loads, resistances, degradation and on the numerical modelling and structural response analysis. It also permits to consider different limit states and different types of damage in a unified framework. Among the types of damages that can occur to steel and steel-concrete composite bridges, fatigue is one of the most dangerous ones, as it may lead to sudden and fragile rupture, even at operational traffic levels. In this context, the present paper proposes a framework for LCCA based on the use of the Pacific Earthquake Engineering Research (PEER) equation which is for the first time utilized for fragility and cost analysis of bridges subjected to fatigue, highlighting the possibility of treating the problem of fatigue damage estimation with an approach similar to the one currently adopted for damage induced by other hazards, like earthquake and wind. To this aim, a damage index computed through the Palmgren-Miner’s rule is adopted as engineering demand parameter. The framework is applied to a composite steel-reinforced concrete multi-span roadway bridge by evaluating the fatigue limit state from different traffic load models, i.e. a Technical Code-based model and a model based on results of Weigh in Motion monitoring system. The evolution over time of the probability of failure and the life-cycle costs due to fatigue damage induced by heavy traffic loads are investigated for different probability distributions of the engineering demand parameter and for different fragility models. The comparison between the fatigue failure probabilities and the life-cycle costs obtained with the two traffic models, encourages the adoption of traffic monitoring systems for a correct damage estimation.

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A Methodology for Fatigue Reliability Assessment Considering Stress Range Distribution Truncation

Cited by 3 publications

References 16 publications

Multi-level Uncertain Fatigue Analysis of a Truss under Incomplete Available Information

Multi-level Uncertain Fatigue Analysis of a Truss under Incomplete Available Information

Fatigue reliability assessment and life-cycle cost analysis of roadway bridges equipped with weigh-in-motion systems

Life-cycle cost analysis of bridges subjected to fatigue damage

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