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    Assessing the Fracture Risk of Corroded Cast-Iron Pipes in Expansive Soils

    Source: Journal of Pipeline Systems Engineering and Practice:;2021:;Volume ( 012 ):;issue: 004::page 04021041-1
    Author:
    Piyius Raj Singh
    ,
    Amit Kanvinde
    ,
    Sriram Narasimhan
    DOI: 10.1061/(ASCE)PS.1949-1204.0000582
    Publisher: ASCE
    Abstract: It is estimated that 82% of the cast-iron pipe stock in North American water distribution systems have outlived their useful service life. Previous studies have shown that moisture-induced soil expansion is a dominant failure mechanism in pipe stock buried in expansive soils; however, this risk has not yet been quantified formally. The purpose of this paper is to quantify the risk of fracture of cast-iron pipes subjected to moisture-induced soil loading. A recently developed mechanics-based pipe–soil interaction model and fracture mechanics with corrosion degradation are used to set up the reliability analysis. Monte Carlo simulation is implemented to synthesize various uncertainties into a probabilistic estimate of the failure of a pipe segment defined by its configurational parameters and age. It is observed that smaller-diameter pit-cast pipes are most at risk, and factors other than age may have a significant impact on pipe failure. The most influential input parameters are identified through a sensitivity analysis, and it is found that the contributions of corrosion parameters and soil expansion parameters to the failure probability are most significant. Limitations of the proposed framework and the areas where more research is needed are discussed in the end.
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      Assessing the Fracture Risk of Corroded Cast-Iron Pipes in Expansive Soils

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4272666
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    • Journal of Pipeline Systems Engineering and Practice

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    contributor authorPiyius Raj Singh
    contributor authorAmit Kanvinde
    contributor authorSriram Narasimhan
    date accessioned2022-02-01T22:07:36Z
    date available2022-02-01T22:07:36Z
    date issued11/1/2021
    identifier other%28ASCE%29PS.1949-1204.0000582.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4272666
    description abstractIt is estimated that 82% of the cast-iron pipe stock in North American water distribution systems have outlived their useful service life. Previous studies have shown that moisture-induced soil expansion is a dominant failure mechanism in pipe stock buried in expansive soils; however, this risk has not yet been quantified formally. The purpose of this paper is to quantify the risk of fracture of cast-iron pipes subjected to moisture-induced soil loading. A recently developed mechanics-based pipe–soil interaction model and fracture mechanics with corrosion degradation are used to set up the reliability analysis. Monte Carlo simulation is implemented to synthesize various uncertainties into a probabilistic estimate of the failure of a pipe segment defined by its configurational parameters and age. It is observed that smaller-diameter pit-cast pipes are most at risk, and factors other than age may have a significant impact on pipe failure. The most influential input parameters are identified through a sensitivity analysis, and it is found that the contributions of corrosion parameters and soil expansion parameters to the failure probability are most significant. Limitations of the proposed framework and the areas where more research is needed are discussed in the end.
    publisherASCE
    titleAssessing the Fracture Risk of Corroded Cast-Iron Pipes in Expansive Soils
    typeJournal Paper
    journal volume12
    journal issue4
    journal titleJournal of Pipeline Systems Engineering and Practice
    identifier doi10.1061/(ASCE)PS.1949-1204.0000582
    journal fristpage04021041-1
    journal lastpage04021041-11
    page11
    treeJournal of Pipeline Systems Engineering and Practice:;2021:;Volume ( 012 ):;issue: 004
    contenttypeFulltext
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