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Vibration Analysis of Kish Island Elevated Water Storage Tank

Nahumi, Hamid Reza | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 56208 (58)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Selk Ghafari, Ali
  7. Abstract:
  8. Elevated water tanks are one of the most critical elements in civilized society to provide safe servicing resources of drinking water after natural and human-made disasters. Dynamic analysis plays a vital role in investigating structural behavior of the elevated storage system subjected to the earthquake-induced vibration. The main scope of this paper is to address the structural stability analysis of the Kish Island’s elevated reinforced concrete water tank employing finite element method. A complete solid model of the structure with detailed design was constructed, and finite element analysis was carried out utilizing ABAQUS software. To investigate the dynamic behavior of the structure, a complete time history of BAM earthquake profile was utilized as the input signal to the proposed model. Sloshing effect on dynamic response of the structure under investigation was considered by added mass fluid-solid interaction model in the half- and completely-filled conditions in the sagittal plane. Simulation results indicate very good stability of the structure under investigation subjected to the strong input dynamic load
  9. Keywords:
  10. Elevated Tank ; Concrete ; Finite Element Method ; Earthquake Load ; Kish Island ; Vibrational Analysis ; Water Towers ; Stability Analysis

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  • Chapter 1 Introduction
    • 1.1 Introduction
  • Chapter 2
  • Chapter 3
    • 3.1 Introduction
      • 3.1.1 Municipal water distribution network
      • 3.1.2 Water tanks
      • 3.1.3 Types of water tanks
      • 3.1.4 Elevated water tank
      • 3.1.5 Operation of elevated water tanks
      • 3.1.6 Types of elevated water tanks
      • 3.1.7 Types of elevated water tanks in terms of appearance
      • 3.1.8 Application of elevated water tank
      • 3.1.9 Determining the volume of the elevated water tank
      • 3.1.10 Types of elevated water tanks in terms of volume
      • 3.1.11 Kish elevated water tank
      • 3.1.12 Safety of elevated water tanks
    • 3.2 Examples of deterioration of elevated reservoirs
      • 3.2.1 Manjil earthquake report about deterioration and damages of elevated water tanks
      • 3.2.2 Bam earthquake in 2003
    • 3.3 The behavior of elevated water tanks against earthquakes
      • 3.3.1 General breakdowns in liquid storage tanks and their causes
    • 3.4 Calculation of forces and loading
      • 3.4.1 Loads on elevated water tanks
      • 3.4.2 How to calculate loads
      • 3.4.3 Hydrodynamic pressures in reservoirs
    • 3.5 Other important factors
      • 3.5.1 The effect of flexibility of tank walls
      • 3.5.2 Effect on Soil and tank interaction
      • 3.5.3 Inelastic vibration torsional behavior of elevated reservoirs
  • Chapter 4
    • 4.1 Modeling
      • 4.1.1 Computer aided design
      • 4.1.2 SolidWorks
      • 4.1.3 2D design
      • 4.1.4 3D design
    • 4.2 Finite element analysis and the concept of nonlinear analysis
      • 4.2.1 Abaqus
      • 4.2.2 Modeling of reinforced concrete finite elements in Abaqus
      • 4.2.3 Parameters required for modeling reinforced concrete finite elements
      • 4.2.4 Reinforcement modeling
      • 4.2.5 Property
      • 4.2.6 Step
    • 4.3 Analysis in the empty state
      • 4.3.1 Load
    • 4.4 Analysis in half-full mode
    • 4.5 Analysis in full mode
    • 4.6 Power Spectrum Analysis
    • 4.7 The effect of the roof of the structure
  • Chapter 5
    • 5.1 Conclusion
    • 5.2 Suggestions
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