Dam-Break Energy of Porous Structure for Scour Countermeasure at Bridge Abutment

سال انتشار: 1401
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 23

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شناسه ملی سند علمی:

JR_CEJ-8-12_019

تاریخ نمایه سازی: 2 اردیبهشت 1403

چکیده مقاله:

The aim of the study is to determine the structure for energy absorption in order to countermeasure the scouring on the bridge abutment. Consider a porous structure for energy absorption, which can reduce flow velocity and depth of scouring due to its porosity. The energy absorber plate demonstrated in triangular shape with several porous as submerged barrier. The investigation was conducted in laboratory and placed the abutment in the middle of the channel with a distance of ۳Lb, ۵Lb, ۷Lb and ۹Lb. The plate area consists of ۰% (MP۱), ۵% (MP۲), and ۱۰% (MP۳). The scour depth measurement (ds) is carried out at ۶ crucial points in the abutment area. Comparisons between experimental measurements and a numerical prediction model are presented. The experimental results show that the percentage of frictional velocity in the inhibition area for each pore opening before the obstacle, ۳۱.۴۲% (decreasing), - ۹.۲۷% (increasing), and -۳۲.۹۲% (increasing), respectively. Furthermore, the optimum position of the porous energy absorber at ۹Lb to the abutment. The magnitude decreases of scour depth obtained from MP۲. It can be concluded that the placement of energy absorbers can lead to damping forces. It also found that the porous structures could be beneficial for motion damping and absorber of the scouring. Doi: ۱۰.۲۸۹۹۱/CEJ-۲۰۲۲-۰۸-۱۲-۰۱۹ Full Text: PDF

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