Dynamic performance of cable-stayed bridge tower with multi-stage pendulum
mass damper under wind excitations ¡ª
II: Experiment
Guo Anxin (¹ù°²Ð½)1, Y L Xu (ÐìÓ×÷ë)2 and Li Hui (Àî»Ý)1
1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090,
China
2. Department of Civil and Structural Engineering, The Hong Kong Polytechnic
University, Hung Hom, Hong Kong, China
Abstract: The possibility of using a
multi-stage pendulum mass damper (MSPMD) to control wind-induced vibration of a
single column tower of a cable-stayed bridge during construction was studied
theoretically in part I of this work. In this paper, the performance of the
MSPMD for reducing bridge tower vibration is studied experimentally. A MSPMD
model and a tower model of the bridge with geometry scaling of 1:100 were
designed and manufactured. Calibration of the MSPMD model with different wire
lengths is conducted to verify the analytical model of the damper. A series of
tests for the uncontrolled freestanding tower, tower with cables, and tower with
MSPMD model are then performed under harmonic and white noise excitations. The
experimental results show that the responses of the tower model significantly
decrease with the installation of the MSPMD model, which demonstrates the
effectiveness of the MSPMD to mitigate the vibration of the bridge tower.
Keywords: experimental study; cable-stayed bridge;
single column tower; multi-stage pendulum mass damper; vibration control
