| Vol. - No. | Vol.2 - No.3 |
|---|---|
| Date | Sep., 2013 |
| Title | Field Measurements of the New CCTV Tower in Beijing |
| Author | Y. L. Xu1+, S. Zhan2, H. Xia2, Y. Xia1, and N. Zhang2 |
| Institutions |
1Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China 2School of Civil Engineering, Beijing Jiaotong University, Beijing, China |
| Abstract |
The emergence of a growing number of tall buildings, often with unusual shapes and innovative structural systems, has led to the realization of the need for and the importance of field measurements. The new China Central Television (CCTV) Tower in Beijing is one of tall buildings with a highly unusual shape and a complex structural system, requiring field measurements to identify its dynamic characteristics for the subsequent dynamic analysis of the tower under wind excitation, seismic-induced ground motion and traffic-induced ground motion. The structural system and the finite element model of the CCTV Tower are first introduced in this paper. The computed natural frequencies and mode shapes are then presented as a reference for the field measurement. After introducing the arrangement of the ambient vibration measurement, the field measured natural frequencies and damping ratios of the CCTV Tower are presented and the measured natural frequencies are finally compared with the computed ones. It was found that the structural damping ratios of the CCTV Tower are small and the computed natural frequencies are smaller than the measured ones by about 12~17%. |
| Keyword | Field measurement, The new CCTV Tower, Dynamic characteristics, Identification, Finite element analysis |
| PP. | PP.171~178 |
| Paper File |
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