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Seismic Isolation Research on a Double-Layer lattice Structure Using Shaking Table Tests

  • Chen-xiao Zhang
  • Gui-bo NieEmail author
  • Jun-wu Dai
  • Kun Liu
  • Xu-dong Zhi
  • Hui-huan Ma
Article
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Abstract

Typical failure patterns of members, supports, and joints were observed in double-layer lattice space structures during the 2013 M7.0 Lushan earthquake in the Sichuan province of China. Various isolation supports have been implemented in recent years to enhance the structural performance by reducing the dynamic responses. However, these isolation supports mostly focus on either horizontal isolation or vertical isolation, which is not applicable for synchronous isolation in both horizontal and vertical directions. Therefore, an innovative isolated support used for three-dimensional isolation was invented. In order to verify the feasibility of using the isolated support to reduce the earthquake response of double-layer lattice structures under small to strong earthquakes, a scale model was subjected to a shaking-table test before and after application of the isolated support. The dynamic characteristics, earthquake performance and failure pattern of the model with and without the isolated supports are discussed based on the earthquake responses, including acceleration, displacement, and strain. Results of the test indicate that the earthquake effect is underestimated without regard to the dynamic amplification effect of the lower supporting reinforced concrete structures, which led to the failure of the structure. The compared experimental results indicate that the isolated supports had remarkable earthquake isolation and reduction in both the horizontal and vertical directions.

Keywords

Double-layer lattice structure Isolated support Shaking-table test Dynamic characteristic Earthquake isolation Earthquake response 

Notes

Acknowledgements

This study is jointly sponsored by China Earthquake Administration Fundamental Research Program (2018B12), National Natural Science Foundation of Heilongjiang Province, China (E2016071), China Earthquake Administration Fundamental Research Program (1520470000001630080301) and Program for Innovative Research Team in China Earthquake Administration, Natural science foundation from the education department of Anhui province (No. RD17100030), The National Nature Science Foundation of China (41702311).

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Copyright information

© Korean Society of Steel Construction 2019

Authors and Affiliations

  • Chen-xiao Zhang
    • 1
  • Gui-bo Nie
    • 2
    Email author
  • Jun-wu Dai
    • 2
  • Kun Liu
    • 3
  • Xu-dong Zhi
    • 3
  • Hui-huan Ma
    • 3
  1. 1.School of Civil Engineering and ArchitectureAnhui University of TechnologyMaanshanChina
  2. 2.Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering MechanicsChina Earthquake AdministrationHarbin CityChina
  3. 3.School of Civil EngineeringHarbin Institute of TechnologyHarbinChina

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