Smart Structures and Systems

  • 제8권4호
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  • Pages.385-398
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  • 2011
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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Health monitoring of reinforced concrete slabs subjected to earthquake-type dynamic loading via measurement and analysis of acoustic emission signals

  • 투고 : 2010.06.21
  • 심사 : 2011.07.31
  • 발행 : 2011.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper discusses the applicability of Acoustic Emission (AE) to assess the damage in reinforced concrete (RC) structures subjected to complex dynamic loadings such as those induced by earthquakes. The AE signals recorded during this type of event can be complicated due to the arbitrary and random nature of seismicity and the fact that the signals are highly contaminated by many spurious sources of noise. This paper demonstrates that by properly filtering the AE signals, a very good correlation can be found between AE and damage on the RC structure. The basic experimental data used for this research are the results of fourteen seismic simulations conducted with a shake table on an RC slab supported on four steel columns. The AE signals were recorded by several low-frequency piezoelectric sensors located on the bottom surface of the slab. The evolution of damage under increasing values of peak acceleration applied to the shake table was monitored in terms of AE and dissipated plastic strain energy. A strong correlation was found between the energy dissipated by the concrete through plastic deformations and the AE energy calculated after properly filtering the signals. For this reason, a procedure is proposed to analyze the AE measured in a RC structure during a seismic event so that it can be used for damage assessment.

키워드

참고문헌

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피인용 문헌

  1. Modified Gutenberg–Richter Coefficient for Damage Evaluation in Reinforced Concrete Structures Subjected to Seismic Simulations on a Shaking Table vol.33, pp.4, 2014, https://doi.org/10.1007/s10921-014-0256-6
  2. Damage assessed by wavelet scale bands and b-value in dynamical tests of a reinforced concrete slab monitored with acoustic emission vol.60-61, 2015, https://doi.org/10.1016/j.ymssp.2015.02.006
  3. Acoustic emission energy b -value for local damage evaluation in reinforced concrete structures subjected to seismic loadings vol.102, 2018, https://doi.org/10.1016/j.ymssp.2017.09.022
  4. Health monitoring of reinforced concrete structures with hysteretic dampers subjected to dynamical loads by means of the acoustic emission energy pp.1741-3168, 2018, https://doi.org/10.1177/1475921718813489
  5. Temporal Acoustic Emission Index for Damage Monitoring of RC Structures Subjected to Bidirectional Seismic Loadings vol.12, pp.17, 2019, https://doi.org/10.3390/ma12172804