Mohammad Vaghefi

In this paper, the scouring around a triad series of vertical bridge piers located in a bend is investigated using SSIIM software. To this end, some of the most essential parameters such as the relative radius and the bridge pier position in both transverse and longitudinal directions to the flow have been examined. Then the bed topography variations have been detected within a flume. It is worth mentioning that the experiments have been conducted in a 180-degree sharp bend in the presence of the bridge piers. The available experimental results were used to ensure correctness of the simulated output data. Accordingly, it is evident that the simulated model not only is capable of estimating the amount of the maximum scour and sedimentation but also can effectively predict their position using an experimental model. Based on the results, it is indicated that the maximum scour depth is reported in the case of the bridge pier transverse to the flow installed at the 60-degree position of the bend with a relative radius of 5. Under these circumstances, the maximum depth of scour is evaluated to be 1.14 times the depth of flow at the beginning of the bend. Also, the maximum volume of scour around bridge piers has been detected in this case.