摘要
对叠层橡胶支座与地下室柱串联体系动力稳定性进行了研究。首先,采用动力稳定性理论对此串联体系受到谐波作用下的动力响应进行分析,并得到体系的主要动力失稳区间;其次,针对地震波是一种随机波形,通过快速傅立叶(FFT)算法变换进行频谱分析,将地震波分解为许多不同频率的谐波;分析了不同的静力及动力载荷系数下失稳区间的变化;数值算例分析了此串联体系在某一地震波下的动力稳定特性。分析的结果为此串联系统的工程设计与应用提供理论依据。
In this paper, the dynamic stability of serial system of laminated rubber bearing with column is studied. Firstly, the dynamic response of the serial system under the action of harmonics is analyzed with the theory of dynamic stability, and the principal region of dynamic instability of the serial system can be obtained. Secondly, the random earthquake waves are decomposed into the superposition of simple harmonic waves with different frequencies by using the spectral analysis of Fast Fourier Transform (FFT) algorithm. The changing of dynamic instability region under different static load factors and column cross-section dimensions is discussed. The dynamic stability character of the above mentioned system under a certain earthquake wave is analyzed by the numerical computational example. The analysed result provides theoretic basis for the design and application of the serial system of laminated rubber bearing with column.
出处
《世界地震工程》
CSCD
北大核心
2005年第1期18-23,共6页
World Earthquake Engineering
基金
甘肃省经贸委科技攻关基金资助项目(42110)
