A Methodology to Measure Flow Fields at Bridge Piers in the Presence of Large Wood Debris Accumulation Using Acoustic Doppler Velocimeters

摘要: Bridge failure due to scour in flooding conditions has been at the center of attention hydraulic engineers for decades. Large wood debris accumulation on bridge piers found as one main causes collapse. The combined action enhanced scouring base pier and increased hydrodynamic load is viewed force driving probability. It therefore fundamental understand distribution flow field around proximity pier, order be able potential acceleration turbulence enhancement that could help what drives reduces its However, this particular configuration poses physical constraints measurements, accumulated mass logs hinders a direct access instrumentation directly immersed water. This paper proposed new methodology measure fields presence using an acoustic Doppler velocimeter (ADV). consists applying matrix rotation instantaneous velocity measured three dimensions locations underneath not accessed standard debris. shows provide accurate measurements groove maintain statistics terms both average intensity.