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| Generalized pseudo-excitation method for wind-excited buildings with control devices |
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| DOI：10.7511/jslx20051005 |
| KeyWord:generalized pseudo-excitation method,wind excitation,random response,vibration control |
| ZHANG Wen-shou~*,YU Xiao,YUE Qian-jin Dalian University of Technology,Dalian 116024,China) |
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| Abstract: |
| Modern tall buildings may possess closely-spaced natural frequencies and non-classical damping because of special architecture requirements and supplemental vibration control devices installed inside the buildings. For such buildings, the classical random-vibration-based mode superposition method, i.e., the Square Root of Sum of Squares (SRSS) rule, often can not accurately predict their wind induced responses. A generalized pseudo-excitation method is thus developed in this paper to tackle the problems in the frequency domain. The generalized pseudo-excitation method is the combination of the complex modal superposition method and the pseudo-excitation method. By using this method, all cross-correlation terms between the participant modes and between the excitations can be retained naturally, and the non-orthogonal structural damping due to discrete control devices can be handled accurately. Two example buildings are presented to demonstrate the advantages of the suggested method, in which the detailed investigation of the effectiveness of active tendons for suppressing wind-induced vibration of a tall building is also provided. |
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