| 大跨度结构TMD减震系统多点激励的地震随机响应分析 |
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| 引用本文： | 吴春秋,朱以文.大跨度结构TMD减震系统多点激励的地震随机响应分析[J].地震工程与工程振动,2003,23(4):131-135. |
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| 作者姓名： | 吴春秋 朱以文 |
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| 作者单位： | 武汉大学土木建筑工程学院,湖北,武汉,430072 |
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| 摘 要： | 众多研究表明，对大跨度结构进行抗震分析时，必须采用非一致地震激励模型。本文对带TMD系统的大跨度结构考虑地震行波效应后的随机地震响应问题进行了研究。文中建立了结构的动力方程，并利用虚拟激励法求解。研究结果表明，对于大跨度结构装设TMD子结构以后可显著地降低结构的位移、速度和加速度响应，但在设计TMD减震系统时，必须考虑到地震激励的非一致性，否则可能会使预期的减震效果失效。
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| 关 键 词： | 被动调谐减震控制体系 大跨度结构 TMD 地震随机响应 多点激励 减震方案 |
| 文章编号： | 1000-1301(2003)04-0131-05 |
Random response analysis of long span structures with TMD under multiple support excitation |
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| WU Chun-qiu,ZHU Yi-wen.Random response analysis of long span structures with TMD under multiple support excitation[J].Earthquake Engineering and Engineering Vibration,2003,23(4):131-135. |
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| Authors: | WU Chun-qiu ZHU Yi-wen |
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| Abstract: | Many studies have shown that non-uniform seismic excitation model should be adopted in seismic analysis of long span structures. In this paper, the study on random response of long span structures with TMD taking the traveling effect of earthquake into account is performed. The dynamic equation is established firstly, and then the pseudo-excitation method is employed to calculate the equation. The investigation results show that the TMD can reduce the displacement, velocity and acceleration remarkably of long span structures, and the non-uniform earthquake excitation must be taken into account when designing the TMD system, otherwise the vibration reduction system may be invalid. |
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| Keywords: | long span structure TMD random earthquake response multiple support excitation vibration reduction system |
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