Structural Engineering and Mechanics

  • 제46권2호
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  • Pages.179-196
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  • 2013
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

On methods for extending a single footfall trace into a continuous force curve for floor vibration serviceability analysis

  • Chen, Jun (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Peng, Yixin (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Ye, Ting (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University)
  • 투고 : 2012.02.14
  • 심사 : 2013.03.30
  • 발행 : 2013.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

An experimentally measured single footfall trace (SFT) from a walking subject needs to be extended into a continuous force curve, which can then be used as load for floor vibration serviceability assessment, or on which further analysis like discrete Fourier transform can be conducted. This paper investigates the accuracy, applicability and parametrical sensitivity of four extension methods, Methods I to IV, which extends the SFT into a continuous time history by the walking step rate, stride time, double support proportion and the double support time, respectively. Performance of the four methods was assessed by comparing their results with the experimentally obtained reference footfall traces in the time and frequency domain, and by comparing the vibrational response of a concrete slab subjected to the extended traces to that of reference traces. The effect of the extension parameter on each method was also explored through parametrical analysis. This study finds that, in general, Method I and II perform better than Method III and IV, and all of the four methods are sensitive to their extension parameter. When reliable information of walking rate or gait period is available in the test, Methods I or II is a better choice. Otherwise, Method III, with the suggested extension parameter of double support time proportion, is recommended.

키워드

과제정보

연구 과제 주관 기관 : National Science Foundation of China, Shanghai Natural Science Foundation

참고문헌

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피인용 문헌

  1. Acceleration response spectrum for predicting floor vibration due to occupant walking vol.333, pp.15, 2014, https://doi.org/10.1016/j.jsv.2014.03.023
  2. Stochastic Single Footfall Trace Model for Pedestrian Walking Load pp.1793-6764, 2018, https://doi.org/10.1142/S0219455419500299
  3. A simplified method for determining the acceleration amplitudes of long-span floor system under walking/running loads vol.75, pp.3, 2013, https://doi.org/10.12989/sem.2020.75.3.377