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Experimental Study of Transverse Waves Effects by Obstacles on Local Scour Around Cylindrical Pier Groups of Bridge
The formation of extensive local scour around piers is a major cause of bridge failure. Many factors affect the local scour around piers. In relation to the possible effect of transverse waves on local erosion around cylindrical bridge piers, no study has been done so far. The transverse standing wave is produced by the periodic force associated with vortex shedding behind each pier of the array. This study investigates the effect of two modes of transverse waves on the scour around vertical cylindrical piers. Three different pier arrangements [A (3 × 4), B (2 × 4), and C (1 × 4)] were used in the experiments. The results showed that the occurrence of transverse waves generally increased the maximum height of local scour around piers, where the effect of the second wave mode was greater than that of the first wave mode. In arrangements A, B, and C, the maximum scour depth in the first wave mode experiments was, on average, 13, 8, and 25.5% greater than that in the wave-less experiments, respectively. In arrangements A and C, the maximum scour depth in the second wave mode experiments was, on average, 6 and 11% greater than that in the wave-less experiments, respectively.
Experimental Study of Transverse Waves Effects by Obstacles on Local Scour Around Cylindrical Pier Groups of Bridge
The formation of extensive local scour around piers is a major cause of bridge failure. Many factors affect the local scour around piers. In relation to the possible effect of transverse waves on local erosion around cylindrical bridge piers, no study has been done so far. The transverse standing wave is produced by the periodic force associated with vortex shedding behind each pier of the array. This study investigates the effect of two modes of transverse waves on the scour around vertical cylindrical piers. Three different pier arrangements [A (3 × 4), B (2 × 4), and C (1 × 4)] were used in the experiments. The results showed that the occurrence of transverse waves generally increased the maximum height of local scour around piers, where the effect of the second wave mode was greater than that of the first wave mode. In arrangements A, B, and C, the maximum scour depth in the first wave mode experiments was, on average, 13, 8, and 25.5% greater than that in the wave-less experiments, respectively. In arrangements A and C, the maximum scour depth in the second wave mode experiments was, on average, 6 and 11% greater than that in the wave-less experiments, respectively.
Experimental Study of Transverse Waves Effects by Obstacles on Local Scour Around Cylindrical Pier Groups of Bridge
Iran J Sci Technol Trans Civ Eng
Salemi, Fateme (author) / Ghomeshi, Mehdi (author) / Bahrami Yarahmadi, Mohammad (author)
2023-08-01
13 pages
Article (Journal)
Electronic Resource
English
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