Earthquakes and Structures

  • 제15권3호
  • /
  • Pages.335-350
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  • 2018
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Ambient vibration based structural evaluation of reinforced concrete building model

  • Gunaydin, Murat (Department of Civil Engineering, Karadeniz Technical University) ;
  • Adanur, Suleyman (Department of Civil Engineering, Karadeniz Technical University) ;
  • Altunisik, Ahmet C. (Department of Civil Engineering, Karadeniz Technical University)
  • 투고 : 2017.11.02
  • 심사 : 2018.08.03
  • 발행 : 2018.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper presents numerical modelling, modal testing, finite element model updating, linear and nonlinear earthquake behavior of a reinforced concrete building model. A 1/2 geometrically scale, two-storey, reinforced concrete frame model with raft base were constructed, tested and analyzed. Modal testing on the model using ambient vibrations is performed to illustrate the dynamic characteristics experimentally. Finite element model of the structure is developed by ANSYS software and dynamic characteristics such as natural frequencies, mode shapes and damping ratios are calculated numerically. The enhanced frequency domain decomposition method and the stochastic subspace identification method are used for identifying dynamic characteristics experimentally and such values are used to update the finite element models. Different parameters of the model are calibrated using manual tuning process to minimize the differences between the numerically calculated and experimentally measured dynamic characteristics. The maximum difference between the measured and numerically calculated frequencies is reduced from 28.47% to 4.75% with the model updating. To determine the effects of the finite element model updating on the earthquake behavior, linear and nonlinear earthquake analyses are performed using 1992 Erzincan earthquake record, before and after model updating. After model updating, the maximum differences in the displacements and stresses were obtained as 29% and 25% for the linear earthquake analysis and 28% and 47% for the nonlinear earthquake analysis compared with that obtained from initial earthquake results before model updating. These differences state that finite element model updating provides a significant influence on linear and especially nonlinear earthquake behavior of buildings.

키워드

과제정보

연구 과제 주관 기관 : Karadeniz Technical University

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피인용 문헌

  1. Nonlinear Dynamic Response of a RC Frame for Different Structural Conditions Including the Effect of FE Model Updating vol.18, pp.5, 2018, https://doi.org/10.1007/s40999-019-00483-6
  2. Response surface-based model updating to detect damage on reduced-scale masonry arch bridge vol.79, pp.1, 2021, https://doi.org/10.12989/sem.2021.79.1.009