多层基础隔震房屋结构在水平地震力作用下的振动传递
|
摘要
文章将周期结构原理与导纳方法结合起来,分析了带复合结构单元的有阻尼的有限周期系统的波传播和振动特性,得到了有限周期结构自振频率的一般表达式。特别地将多层房屋结构简化为带集中质量的有限周期柱模型,分析了在水平地震力作用下的基础隔震结构的振动功率流,并比较了有限周期柱模型与刚体质量块模型的基础隔震传递率。文章指出,基础隔震系统能有效地延长建筑物的自振周期,减少振动功率流的传递,隔震系统的阻尼能有效地降低结构的共振反应。
This paper describes the wave propagation and vibration characteristics of mono-coupled structures which are of spatially periodic nature; particular emphasis is laid on studying finite damped periodic systems with composite structural elements. The receptance approach to periodic structure theory is applied to study thd vibrational power flow of a base-isolated multi-storey building due to horizontal ground motion. Numerical results indicate the influence of the building impedance the properties of the isolator and the fundamental vibration frequency of the system. It has been pointed out that a finite periodic column with concentrated masses model for a building can be used to provide further insight into the vibrational characteristics of a multi-storey building.
This paper describes the wave propagation and vibration characteristics of mono-coupled structures which are of spatially periodic nature; particular emphasis is laid on studying finite damped periodic systems with composite structural elements. The receptance approach to periodic structure theory is applied to study thd vibrational power flow of a base-isolated multi-storey building due to horizontal ground motion. Numerical results indicate the influence of the building impedance the properties of the isolator and the fundamental vibration frequency of the system. It has been pointed out that a finite periodic column with concentrated masses model for a building can be used to provide further insight into the vibrational characteristics of a multi-storey building.
引文
1． M. A. Keckl,Investi0000gations on the Vibrations of Grillagea and Other Simple Beam Structure. J. of the Acoustical Society of America 36,1964,1335-1343
2． D. J. Mead ,Free Wave Propagation in Periodically Supported Infinite Beams J. Sound & Vib. 11,1970,181-197
3． D. J. Mead ,Wave Propagation and Natural Modes in Periodic Systems: I. Mono-coupled Systems. J. Sound & Vib. 40,1975,1-18
4． R. S. Ayre and L. S. Jacobsen, Natural Frequencies of Continuous Beams of Uniform Span Length.J.of Applied Mechanies 17x, 1950,391-403
5． R. E. D. Bishop and D. C. Johnson ,The Mechanics of Vibration,Cambridge :University Press, 1960 of Applied Mechanics
2． D. J. Mead ,Free Wave Propagation in Periodically Supported Infinite Beams J. Sound & Vib. 11,1970,181-197
3． D. J. Mead ,Wave Propagation and Natural Modes in Periodic Systems: I. Mono-coupled Systems. J. Sound & Vib. 40,1975,1-18
4． R. S. Ayre and L. S. Jacobsen, Natural Frequencies of Continuous Beams of Uniform Span Length.J.of Applied Mechanies 17x, 1950,391-403
5． R. E. D. Bishop and D. C. Johnson ,The Mechanics of Vibration,Cambridge :University Press, 1960 of Applied Mechanics
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心