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    Performance of Cast-Iron-Pipe Bell-Spigot Joints Subjected to Overburden Pressure and Ground Movement

    Source: Journal of Pipeline Systems Engineering and Practice:;2013:;Volume ( 004 ):;issue: 002
    Author:
    Balvant Rajani
    ,
    Ahmed Abdel-Akher
    DOI: 10.1061/(ASCE)PS.1949-1204.0000125
    Publisher: American Society of Civil Engineers
    Abstract: Bell split, in which a shard is separated from the bell end of a bell-spigot joint, is a predominant failure mode (in addition to longitudinal facture) that is observed in lead-caulked bell-spigot joints of large-diameter cast-iron pipes installed between 1850 and the early 1960s. This paper addresses three specific issues related to this type of failure of lead-caulked bell-spigot joints: (1) the extent to which cast-iron pipe joints can rotate without inducing stress in the bell; (2) the behavior of the bell–spigot lead-caulked joints; and (3) an estimate of the degree of settlement that two or more contiguous segments of jointed cast-iron pipe can tolerate before failure. The procedures described in this paper were motivated by the need to understand and explain the circumstances that lead to this failure mode in large-diameter cast-iron pipes. A mechanistic model accounts for lead material nonlinearity, wet and dry joint conditions encountered in water and gas pipelines, respectively, and existence or absence of asphalt coating on the outer pipe surface. The model is validated against experimental tests conducted in the mid-1930s on lead-caulked bell-spigot joints and is subsequently used to develop another model to predict the cumulative joint response of two or more contiguous pipe segments resting on an elastic medium and subject to overburden pressure followed by ground movement. Illustrative analyses of 400 and 1,200 mm diameter pipes clearly show that the extent to which a pipe joint can rotate without failure when subjected to ground movement gets smaller as the pipes become larger. The models developed in this paper to characterize joint behavior can be used to monitor pipe joint condition if actual joint rotations are measured when conducting pipe inspection.
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      Performance of Cast-Iron-Pipe Bell-Spigot Joints Subjected to Overburden Pressure and Ground Movement

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    contributor authorBalvant Rajani
    contributor authorAhmed Abdel-Akher
    date accessioned2017-05-08T21:58:07Z
    date available2017-05-08T21:58:07Z
    date copyrightMay 2013
    date issued2013
    identifier other%28asce%29sc%2E1943-5576%2E0000020.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/67671
    description abstractBell split, in which a shard is separated from the bell end of a bell-spigot joint, is a predominant failure mode (in addition to longitudinal facture) that is observed in lead-caulked bell-spigot joints of large-diameter cast-iron pipes installed between 1850 and the early 1960s. This paper addresses three specific issues related to this type of failure of lead-caulked bell-spigot joints: (1) the extent to which cast-iron pipe joints can rotate without inducing stress in the bell; (2) the behavior of the bell–spigot lead-caulked joints; and (3) an estimate of the degree of settlement that two or more contiguous segments of jointed cast-iron pipe can tolerate before failure. The procedures described in this paper were motivated by the need to understand and explain the circumstances that lead to this failure mode in large-diameter cast-iron pipes. A mechanistic model accounts for lead material nonlinearity, wet and dry joint conditions encountered in water and gas pipelines, respectively, and existence or absence of asphalt coating on the outer pipe surface. The model is validated against experimental tests conducted in the mid-1930s on lead-caulked bell-spigot joints and is subsequently used to develop another model to predict the cumulative joint response of two or more contiguous pipe segments resting on an elastic medium and subject to overburden pressure followed by ground movement. Illustrative analyses of 400 and 1,200 mm diameter pipes clearly show that the extent to which a pipe joint can rotate without failure when subjected to ground movement gets smaller as the pipes become larger. The models developed in this paper to characterize joint behavior can be used to monitor pipe joint condition if actual joint rotations are measured when conducting pipe inspection.
    publisherAmerican Society of Civil Engineers
    titlePerformance of Cast-Iron-Pipe Bell-Spigot Joints Subjected to Overburden Pressure and Ground Movement
    typeJournal Paper
    journal volume4
    journal issue2
    journal titleJournal of Pipeline Systems Engineering and Practice
    identifier doi10.1061/(ASCE)PS.1949-1204.0000125
    treeJournal of Pipeline Systems Engineering and Practice:;2013:;Volume ( 004 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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