The Reynolds-averaged Navier-Stokes (RANS) equations and standard k-ε turbulence model were used to establish the three-dimensional numerical wave flume. Considering the conditions that the wave only acted on the pile foundation and on the whole composite structure, the influence of the wave characteristics on the forces was simulated and analyzed. Results show that when the angle of wave incidence is zero, the wave forces on the piles in the near-shore are larger than that on the flat bed. And in the near-shore, the wave forces increase with pile spacing when the pile is in the front row, while decrease with pile spacing when the pile is in the back row. Furthermore, the total force on the pile foundation increases with KC number and wave height ratio according to the rule of power exponent. The wave force subjected by the bridge substructure varies little with the incident wave direction, but it varies greatly with KC number and wave height ratio, and the largest rate of growth is 704%. However, due to that the current-obstruction width of the composite structure varies greatly in vertical direction, compared with KC number, the wave height ratio can better reflect the effect of the wave characteristics on the wave forces subjected by the bridge substructure.
Received: 03 November 2017
Published: 13 December 2018
KUAI Yan-rong, QI Mei-lan, LI Jin-zhao. Analysis of wave forces on bridge substructure in near-shore. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2018, 52(12): 2356-2364.
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