Publication Date:
2012-09-15
Description:
For super high-rise buildings, the vibration period of the basic mode is several seconds, and it is very close to the period of the fluctuating wind. The damping of super high-rise buildings is low, so super high-rise buildings are very sensitive to fluctuating wind. The wind load is one of the key loads in the design of super high-rise buildings. It is known that only the basic mode is needed in the wind-response analysis of tall buildings. However, for super high-rise buildings, especially for the acceleration response, because of the frequency amplification of the high modes, the high modes and the mode coupling may need to be considered. Three typical super high-rise projects with the SMPSS in wind tunnel tests and the random vibration theory method were used to analyze the effect of high modes on the wind-induced response. The conclusions can be drawn as follows. First, for the displacement response, the basic mode is dominant, and the high modes can be neglected. Second, for the acceleration response, the high modes and the mode coupling should be considered. Lastly, the strain energy of modes can only give the vibration energy distribution of the high-rise building, and it cannot describe the local wind-induced vibration of high-rise buildings, especially for the top acceleration response. Content Type Journal Article Pages 427-434 DOI 10.1007/s11803-012-0132-2 Authors Ruoqiang Feng, The Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, 210096 China Guirong Yan, Department of Civil Engineering, University of Texas at El Paso, El Paso, Texas 79968, USA Jinming Ge, The Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing, 210096 China Journal Earthquake Engineering and Engineering Vibration Online ISSN 1993-503X Print ISSN 1671-3664 Journal Volume Volume 11 Journal Issue Volume 11, Number 3
Print ISSN:
1671-3664
Electronic ISSN:
1993-503X
Topics:
Geosciences
Permalink