Dual lidar wind measurements along an upstream horizontal line perpendicular to a suspension bridge

Abstract Remote wind sensing can complement traditional anemometry at a bridge site and contribute to an improved wind-resistant design of long-span bridges. This study examines lidar measurement data recorded along 168-meter-long horizontal line perpendicular the main span suspension in complex terrain. The velocity records are obtained by pair continuous-wave Doppler lidars (short-range WindScanners) installed on deck. explored terms mean speed direction upstream bridge. spectral characteristics turbulence also investigated relation increasing sampling volumes system distances from monitored area. Wind observed compared those derived sonic anemometer above deck midspan. results provide new insight into flow fjord demonstrate potential measurements charting around A slight monotonic increase speed, as well decrease yaw angle, is distance reduces 160 m 20 m, while lower velocities accompanied more stable direction. Within 15 deck, adopted setup gives unreliable information due large angle between beams.