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Developing experimental technology and numerical analysis model for non-linear behaviour of Bi-tilt isolator

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Abstract

Traditional isolator is hard to control because that it is easily caused large deformation by middle and above earthquake force, resulting in the large transmission of seismic force to structure. Therefore, Bi-Tilt Isolator, BTI is developed to improve the defects of isolator. BTI is composed of symmetrical slope, sliding force will not occur when the interactive force is less than threshold value. To investigate the dynamic responses and influences of this proposed BTI, Arduino techniques is applied to develop a smart measuring device for measuring acceleration responses. Then, a no-contact low-cost accuracy detecting method-dynamic digital image correlation method, DIC is proposed to detect the displacement responses and analyze influence of BTI. Mathematical models and const velocity regression method are derived to simulate the dynamic responses of this proposed BTI based on the motion stages of BTI. Then, dynamic test and numerical analysis results of BTI are compared to demonstrate the accuracy of these proposed models. Analysis results reveal that (1) this developed smart measuring device is easily to detect the acceleration responses of BTI based on Arduino techniques; (2) displacement responses also tiny displacement responses of BTI are easily identified by the Dynamic DIC method; (3) the proposed mathematical model and constant velocity regression method can simulate accurately dynamic responses in the interface between substrate of BTI and slider with fully lubricated and mild lubrication. For those without lubrication, the analysis accuracy of error root mean square attains 0.42% and 3.10% of initial displacement for nonlinear and constant friction respectively.

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Acknowledgement

The authors would like to acknowledge the support of Taiwan Ministry of Science and Technology through grant No. MOST-105-2221-E-260-003 and MOST-105-2221-E-167-001.

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Authors and Affiliations

  1. Department of Civil Engineering, National Chi Nan University, Nan-Tou, 545,, Taiwan

    Ming-Hsiang Shih

  2. Department of Landscape Architecture, Integrated Research Center for Green Living Technologies, National Chin-Yi University of Technology, Taichung, 41170, Taiwan

    Wen-Pei Sung

Authors
  1. Ming-Hsiang Shih
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  2. Wen-Pei Sung
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Correspondence to Wen-Pei Sung.

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Shih, MH., Sung, WP. Developing experimental technology and numerical analysis model for non-linear behaviour of Bi-tilt isolator. Sādhanā 46, 96 (2021). https://doi.org/10.1007/s12046-021-01600-9

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  • DOI: https://doi.org/10.1007/s12046-021-01600-9

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