DYNAMIC CHARACTERISTICS OF THE 300M-HEIGHT TOWER FOR SUTONG BRIDGE
This paper presents the experimental and analytical modal parameters identification for the tower of the Sutong Bridge, a cable-stayed bridge with a main span of 1088 m in China. The investigated tower is made of concrete and steel and is characterized by its more than 300 meters height. The dynamical behavior is an important issue during the erection stage. Ambient vibration tests are carried out to determine the dynamic characteristics of the tower as in the self- erected phase. 9 vibration modes are identified in the frequency range 0-3.5Hz using both the peak- picking method and the stochastic subspace parameter identification method. Moreover, modal damping ratios of the high tower are accurately obtained using random decrement technique. The identified results are used to validate the finite element (FE) model of the tower developed from the design drawings. The main assumption adopted in the FE model for high tower dynamic behavior are assessed and summarized through the comparison between the measured and the updated FE predicted modal parameters.
Dynamic characteristic identification Stochastic subspace parameter identification Peak-picking method Random decrement technique FE model
Jianfeng Liu Min Gao Qiwei Zhang
Department of Bridge Engineering, Tongji University, Shanghai, China, 200092 Department of Bridge Engineering, Tongji University, Shanghai, China, 200092 State Key Laboratory fo
国际会议
上海
英文
510-518
2007-12-04（万方平台首次上网日期，不代表论文的发表时间）