Influence of Wave Incidence Angle on Blockage Effect of Round-ended Pier Model in Wave Flume Test
Model flume tests are commonly used to study the wave action on bridge pier column structures.When the pier model is large,the influence of the blockage effect on the wave action of the bridge-pier model cannot be ignored.The wave load of the circular terminal section of the bridge pier is significantly affected by the wave incidence angle.However,the influence of the wave incidence angle on the blockage effect of the model test remains unclear.Therefore,wave load flume tests at different scales and wave incidence angles were performed in this work to analyze the influence of the wave incidence angle on the blockage effect.A three-dimensional numerical wave flume based on Reynolds time mean(RANS)equation and k-ε turbulence model was established.A mass source was used to generate waves.The changes in the wave force under different blockage ratios were revealed,and the critical blockage ratios under different wave incidence angles were investigated.Considering the influence of different wave incidence angles,a wave force correction method for a circular pier model under the influence of the blockage effect is proposed,and the rationality of the method was verified via numerical simulation.The results show that:① the blockage effect increases the positive wave force on the round-ended pier;②the wave incidence angle affects the blockage effect of the round-ended pier,resulting in different critical blockage ratios under different wave incidence angles.However,the blockage effect can be effectively avoided when the critical flume width is six times the water-blocking width of the pier;③ using the peak value of the forward wave force as the research object,the correction coefficient was obtained,and the wave force correction formula of the round-ended pier affected by the blocking effect at any wave incidence angle is proposed;the correction effect is good.The relevant research results provide reference value for wave action flume tests and wave load calculations for bridges over the sea.
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NSTL
万方数据
维普
