Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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System Identification for Structural Vibration of Layered Stone Pagoda System

적층식 석탑의 진동 시스템 인식

  • 김병화 (경남대학교 토목공학과)
  • Received : 2017.05.08
  • Accepted : 2017.07.21
  • Published : 2017.09.01
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Abstract

This study proposes a numerical model to explain the closely placed double modes in the vibration of a layered stone pagoda system. The friction surface between the stones is modelled as the Timoshenko finite element while each stone layer is modelled as a rigid body. It is assumed that the irregular asperity on the friction surface enables the stone to be excited. This results in the closely placed modes that are composed of natural modes and self-excited modes. To examine the validity of the proposed model, a set of modal testing and analysis for a layered stone pagoda mock-up model has been conducted and a set of closely placed double modes are extracted. Applying the extended sensitivity-based system identification technique, the various system parameters are identified so that the modal parameters of the proposed numerical model are the same with those of the experimental mock-up. For a horizontal impulse excitation, the simulated acceleration responses are compared with measurements.

Keywords

References

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  1. Distinct Element Modelling of Stacked Stone Pagoda for Seismic Response Analysis vol.22, pp.6, 2018, https://doi.org/10.5000/EESK.2018.22.6.345