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نویسندگان مقالات پربازدید :
تجزیه و تحلیل شکست مهندسی
جزئیات رویداد
اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
حوزه های تحت پوشش رویداد

  • failure analysis on collapsed towers of overhead electrical lines in the region münsterland (germany) 2005

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    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 708
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
      end of november 2005 strong south-west wind and heavy snowfall were predominant in the region münsterland, north-western part of germany. this led to accretion of a considerable quantity of wet snow to overhead electrical lines in form of snow rolls on the conductors. eighty-two transmission towers failed catastrophically, most of them by buckling, however some by brittle fracture. as a consequence nearly 250,000 people have been cut off from electrical power supply for several days with major media attention. this paper describes the forensic analysis in order to investigate the failure cause. therefore extensive materials investigations, mechanical testing of original components and specimens thereof, estimations for the real wind and snow loads and their combinations, structural analyses as well as detailed evaluations on the basis of previous investigations, literature and regulations were conducted. it was revealed that some of the examined components were manufactured from thomas steel which was partially in embrittled condition. the investigated towers fulfilled the design codes valid at the time of erection. however the present line loads of the wet snow rolls on the conductors exceeded by far the ones given in the design codes valid at that time.

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