公开(公告)号：US11293832B2

公开(公告)日：2022-04-05

申请号：US17055089

申请日：2019-08-05

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Fuyou Xu ,  Mingjie Zhang ,  Zhaoyu Ma

IPC: G01M7/02 ,  G01M9/00

Abstract: The present invention provides large-amplitude vertical-torsional coupled free vibration testing device for bridges in natural winds, which comprises a rigid model, light-weight high-strength thin strings, linear extension springs, a rigid framework, spring protection tubes, a turntable, a rigid column, a motor, heavy blocks, and rigid thin circular rods. Based on the device, free vibration tests of a bridge deck rigid model can be carried out in natural wind with good conditions, and hence the large-scale wind tunnel device is no longer required. The scaling ratio of the rigid model is no longer limited by the wind tunnel size as in a traditional test, and the scaling ratio can be much larger. Compared with traditional wind tunnel test, the device is more suitable for large-amplitude vibration tests since it can reduce the geometrical nonlinearities of the extension springs and the blocking ratio.