Smart Structures and Systems

  • 제21권1호
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  • Pages.53-64
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  • 2018
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Axial load detection in compressed steel beams using FBG-DSM sensors

  • Bonopera, Marco (Bridge Engineering Division, National Center for Research on Earthquake Engineering) ;
  • Chang, Kuo-Chun (Department of Civil Engineering, National Taiwan University) ;
  • Chen, Chun-Chung (Bridge Engineering Division, National Center for Research on Earthquake Engineering) ;
  • Lee, Zheng-Kuan (Bridge Engineering Division, National Center for Research on Earthquake Engineering) ;
  • Tullini, Nerio (Department of Engineering, University of Ferrara)
  • 투고 : 2017.05.15
  • 심사 : 2017.12.12
  • 발행 : 2018.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

Nondestructive testing methods are required to assess the condition of civil structures and formulate their maintenance programs. Axial force identification is required for several structural members of truss bridges, pipe racks, and space roof trusses. An accurate evaluation of in situ axial forces supports the safety assessment of the entire truss. A considerable redistribution of internal forces may indicate structural damage. In this paper, a novel compressive force identification method for prismatic members implemented using static deflections is applied to steel beams. The procedure uses the Euler-Bernoulli beam model and estimates the compressive load by using the measured displacement along the beam's length. Knowledge of flexural rigidity of the member under investigation is required. In this study, the deflected shape of a compressed steel beam is subjected to an additional vertical load that was short-term measured in several laboratory tests by using fiber Bragg grating-differential settlement measurement (FBG-DSM) sensors at specific cross sections along the beam's length. The accuracy of midspan deflections offered by the FBG-DSM sensors provided excellent force estimations. Compressive load detection accuracy can be improved if substantial second-order effects are induced in the tests. In conclusion, the proposed method can be successfully applied to steel beams with low slenderness under real conditions.

키워드

과제정보

연구 과제 주관 기관 : National Applied Research Laboratories

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피인용 문헌

  1. Reliability of the Tensile Force Identification in Ancient Tie-Rods Using One Flexural Mode Shape pp.1558-3066, 2019, https://doi.org/10.1080/15583058.2018.1563227
  2. Influence of prestressing on the behavior of uncracked concrete beams with a parabolic bonded tendon vol.77, pp.1, 2018, https://doi.org/10.12989/sem.2021.77.1.001