Structural Engineering and Mechanics

  • 제50권2호
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  • Pages.137-149
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  • 2014
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Modal parameter identification of in-filled RC frames with low strength concrete using ambient vibration

  • Arslan, Mehmet E. (Karadeniz Technical University, Department of Civil Engineering) ;
  • Durmus, Ahmet (Karadeniz Technical University, Department of Civil Engineering)
  • 투고 : 2012.09.05
  • 심사 : 2013.02.15
  • 발행 : 2014.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, modal parameters such as natural frequencies, mode shapes and damping ratios of RC frames with low strength are determined for different construction stages using ambient vibration test. For this purpose full scaled, one bay and one story RC frames are produced and tested for plane, brick in-filled and brick in-filled with plaster conditions. Measurement time, frequency span and effective mode number are determined by considering similar studies and literature. To obtain experimental dynamic characteristics, Enhanced Frequency Domain Decomposition and Stochastic Subspace Identification techniques are used together. It is shown that the ambient vibration measurements are enough to identify the most significant modes of RC frames. The results indicate that modal parameters change significantly depending on the construction stages. In addition, Infill walls increase stiffness and change the mode shapes of the RC frame. There is a good agreement between mode shapes obtained from brick in-filled and in-filled with plaster conditions. However, some differences are seen in plane frame, like expected. Dynamic characteristics should be verified using finite element analysis. Finally, inconsistency between experimental and analytical dynamic characteristics should be minimize by finite element model updating using some uncertain parameters such as material properties, boundary condition and section properties to reflect the current behavior of the RC frames.

키워드

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피인용 문헌

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  3. Effectiveness of seismic repairing stages with CFRPs on the seismic performance of damaged RC frames vol.67, pp.3, 2014, https://doi.org/10.12989/sem.2018.67.3.233
  4. Soil foundation effect on the vibration response of concrete foundations using mathematical model vol.22, pp.2, 2014, https://doi.org/10.12989/cac.2018.22.2.221
  5. Numerical Modeling of Masonry Infilled Reinforced Concrete Building during Construction Stages Using ABAQUS Software vol.9, pp.8, 2014, https://doi.org/10.3390/buildings9080181