Structural Engineering and Mechanics

  • 제89권4호
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  • Pages.421-436
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  • 2024
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR Code

Experimental investigation of the excitation frequency effects on wall stress in a liquid storage tank considering soil-structure-fluid interaction

  • Diego Hernandez-Hernandez (Department of Civil and Environmental Engineering, The University of Auckland) ;
  • Tam Larkin (Department of Civil and Environmental Engineering, The University of Auckland) ;
  • Nawawi Chouw (Department of Civil and Environmental Engineering, The University of Auckland)
  • 투고 : 2023.10.20
  • 심사 : 2024.02.20
  • 발행 : 2024.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

This research addresses experimentally the relationship between the excitation frequency and both hoop and axial wall stresses in a water storage tank. A low-density polyethylene tank with six different aspect ratios (water level to tank radius) was tested using a shake table. A laminar box with sand represents a soil site to simulate Soil-Structure Interaction (SSI). Sine excitations with eight frequencies that cover the first free vibration frequency of the tank-water system were applied. Additionally, Ricker wavelet excitations of two different dominant frequencies were considered. The maximum stresses are compared with those using a nonlinear elastic spring-mass model. The results reveal that the coincidence between the excitation frequency and the free-vibration frequency of the soil-tank-water system increases the sloshing intensity and the rigid-like body motion of the system, amplifying the stress development considerably. The relationship between the excitation frequency and wall stresses is nonlinear and depends simultaneously on both sloshing and uplift. In most cases, the maximum stresses using the nonlinear elastic spring-mass model agree with those from the experiments.

키워드

과제정보

The authors wish to thank the Mexican Government for awarding the first author the doctoral scholarship "CONACyT-SENER Hidrocarburos" for his PhD research at the University of Auckland.

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