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نویسندگان مقالات پربازدید :
مجله تحقیقات فولاد ساختمانی 2014
جزئیات رویداد
اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
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  • applicability and structural response for bearing system replacement in suspension bridge rehabilitation

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    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 1179
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     suitable maintenance, rehabilitation, and repair methods for long-span bridges should be decided based on their purposes as evaluated by carrying out close inspection and observation. this study deals with a rehabilitation method, its applicability to a long-span bridge with a fatigue crack in the stinger-bearing connection plate. replacing line type contact bearing systems with pot bearings was proposed as the rehabilitation method to stop fatigue cracking, reduce local stress of the fatigue-cracked connection plates, and improve the structural behaviors of the main suspension bridge members. thus, a stringer-bearing connection specimen was fabricated; then, gouging and bracket installation were simulated for replacing a deteriorated bearing system with a new bearing system. from the results of the gouging and bracket-installation test, the applicability of the rehabilitation method for change works was verified. in addition, the structural responses of the loading tests were compared with those of a finite element analysis in terms of changes in bearing conditions. the deformations of the stringer and the end-beam improved, and local stress and displacement in the fatigue-cracked connection plate were reduced owing to the bearing system replacement. therefore, replacement of the bearing system can improve the stress level and stop further fatigue cracking in fatigue-cracked connection plates of suspension bridges. in addition, these results can provide basic information about the rehabilitation method involving replacing the bearing systems of bridges with line type contact bearings.

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