Bending wave isolation by periodic foundation with rotational oscillators

LIU Guanchen; ZHANG Zhiwei; HUANG Jiankun; HU Yucun

doi:10.11835/j.issn.2096-6717.2021.245

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Bending wave isolation by periodic foundation with rotational oscillators

Civil Engineering | 更新时间：2023-09-19

- Bending wave isolation by periodic foundation with rotational oscillators
- Journal of Civil and Environmental Engineering Vol. 45, Issue 5, Pages: 66-80(2023)
- 作者机构：
  
  北京林业大学水土保持学院，北京 100083
- 作者简介：
  
  LIU Guanchen (1993- ), main research interest: periodic structure isolation, E-mail: yang67896@163.com.
  HUANG Jiankun （corresponding author）, PhD, associate professor, doctorial supervisor, E-mail: jiankunhuang@bjfu.edu.cn.
- 基金信息：
- DOI：10.11835/j.issn.2096-6717.2021.245
  CLC： TU352.12
- Received：18 June 2021，
  
  Published：25 October 2023
- 稿件说明：
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LIU Guanchen, ZHANG Zhiwei, HUANG Jiankun, et al. Bending wave isolation by periodic foundation with rotational oscillators[J]. Journal of Civil and Environmental Engineering, 2023, 45(5): 66-80.
DOI：

LIU Guanchen, ZHANG Zhiwei, HUANG Jiankun, et al. Bending wave isolation by periodic foundation with rotational oscillators[J]. Journal of Civil and Environmental Engineering, 2023, 45(5): 66-80. DOI： 10.11835/j.issn.2096-6717.2021.245.

摘要

提出一种含旋转振子的周期性基础（PF）板，用于高层建筑对地震弯曲波的隔震。早期对PF隔震的研究主要针对平面波，但地震波对于周期性基础板结构更易激发弯曲波。突破以往研究仅针对平面波的局限性，对弯曲波输入的频散关系进行探究；通过有限元法，利用可考虑板厚影响的SHELL单元计算PF板的弯曲波衰减域，系统研究材料参数和几何参数对弯曲波衰减域的影响；通过对三维有限元模型进行弯曲波和地震波入射的数值仿真试验，验证PF隔震的有效性。结果表明：弯曲波衰减域对连杆的宽度和弹性模量变化很敏感；在弯曲波输入下，PF的衰减域在10 Hz以下，与混凝土基础板相比，PF对弯曲波的隔震效率大于60%，能够作为高层建筑的隔震基础。

Abstract

A periodic foundation (PF) plate with rotational oscillators was used for the bending wave isolation of high-rise buildings. Previous studies concerning the PF focused on the in-plane waves. However

seismic waves easily excite bending waves for the periodic foundation plate structure. This study broke through the limitation of plane wave research by studying the bending wave dispersion curves. The finite element method was employed to calculate the bending wave Attenuation Zones (AZs) of the PF plate by the SHELL element which can consider the influence of the plate thickness of the plate. The influences of the material and geometrical parameters on the bending wave AZs were comprehensively investigated. The effectiveness of the PF was demonstrated via a three-dimensional finite element model under incident harmonic bending-waves and seismic waves. The results show that the bending wave AZs are sensitive to the width and elastic modulus of the linkers. The bending wave AZs of the PFs were lower than 10 Hz

and the seismic isolation efficiency was greater than 60% compared to the concrete foundation

which is sufficient for it to serve as a seismic isolation foundation for high-rise buildings.

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references

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