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    Failure Analysis of Transmission Line Towers

    Source: Journal of Performance of Constructed Facilities:;2011:;Volume ( 025 ):;issue: 003
    Author:
    N. Prasad Rao
    ,
    G. M. Samuel Knight
    ,
    S. Seetharaman
    ,
    N. Lakshmanan
    ,
    Nagesh R. Iyer
    DOI: 10.1061/(ASCE)CF.1943-5509.0000161
    Publisher: American Society of Civil Engineers
    Abstract: Transmission line towers, though designed per code provisions, may fail during mandatory testing required in many countries. Different types of premature failures that were observed during full-scale testing of transmission line towers at Tower Testing and Research Station, Structural Engineering Research Centre, Chennai (CSIR-SERC) are studied, and the results are discussed in detail. The failures are modeled using finite-element software, and the analytical results and the test results are compared with various code provisions. The nonlinear finite-element analysis program NE-Nastran was used to model the elastoplastic behavior of towers. Bracing members with slenderness ratios above 170 become ineffective, even though they have to carry insignificant forces. Importance of design assumptions and connection detailing in overall performance of towers were studied. Nonlinear finite-element analysis is useful in understanding the system behavior and for prediction of the failure pattern and ultimate load. Based on the test results, the importance of studying these failures is highlighted and significant conclusions were drawn.
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      Failure Analysis of Transmission Line Towers

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    http://yetl.yabesh.ir/yetl1/handle/yetl/57752
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    contributor authorN. Prasad Rao
    contributor authorG. M. Samuel Knight
    contributor authorS. Seetharaman
    contributor authorN. Lakshmanan
    contributor authorNagesh R. Iyer
    date accessioned2017-05-08T21:37:24Z
    date available2017-05-08T21:37:24Z
    date copyrightJune 2011
    date issued2011
    identifier other%28asce%29cf%2E1943-5509%2E0000164.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/57752
    description abstractTransmission line towers, though designed per code provisions, may fail during mandatory testing required in many countries. Different types of premature failures that were observed during full-scale testing of transmission line towers at Tower Testing and Research Station, Structural Engineering Research Centre, Chennai (CSIR-SERC) are studied, and the results are discussed in detail. The failures are modeled using finite-element software, and the analytical results and the test results are compared with various code provisions. The nonlinear finite-element analysis program NE-Nastran was used to model the elastoplastic behavior of towers. Bracing members with slenderness ratios above 170 become ineffective, even though they have to carry insignificant forces. Importance of design assumptions and connection detailing in overall performance of towers were studied. Nonlinear finite-element analysis is useful in understanding the system behavior and for prediction of the failure pattern and ultimate load. Based on the test results, the importance of studying these failures is highlighted and significant conclusions were drawn.
    publisherAmerican Society of Civil Engineers
    titleFailure Analysis of Transmission Line Towers
    typeJournal Paper
    journal volume25
    journal issue3
    journal titleJournal of Performance of Constructed Facilities
    identifier doi10.1061/(ASCE)CF.1943-5509.0000161
    treeJournal of Performance of Constructed Facilities:;2011:;Volume ( 025 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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