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프로젝트 사례

활용사례 및 기타 자료

200k LNG Tank leak analysis

프로젝트 사례

1. Overview

  • Date of implementation: 2021

  • Tank type: 200,000 m3 Full Containment LNG storage Tank

2. Purpose

  • Safety review in case of LNG leak

3. Ideas

(1) Analysis model

  • Construction stage-by-stage analysis expressing operation status and leakage status step by step

  • 3D solid model representing more than ¼

  • Application of thermo-mechanical coupled analysis technique that links thermal analysis results with structural analysis input

  • Perform time history analysis examining various runoff levels for each of two outdoor temperatures.

  • Concrete creep/drying shrinkage effects are reflected assuming long-term load

  • Reinforcing bars are also reflected in the analysis model

Classification of material properties including insulation

(2) Material properties

  • Reflects material properties that change depending on temperature

  • Concrete material nonlinear model including spalling/cracking

  • Reinforcing bar material nonlinear model including material yield

Nonlinear behavior in compression and exponential softening surface in tension

(3) Thermal analysis load

  • Initial temperature: Initial temperature at which thermal stress does not occur

  • Constant temperature: Divided into summer/winter and achieve temperature balance under constant outdoor temperature conditions.

  • Outflow temperature: Assuming outflow situation

(4) Structural analysis loads and load combinations

  • Set thermal analysis results as structural analysis input

  • Structural analysis is performed on temperature distribution according to thermal analysis and structural loads according to ULS load combination.

4. Example analysis results

Thermal analysis operation stage temperature distribution
Thermal analysis outflow stage temperature distribution
Structural analysis outflow stage deflection diagram
Structural Analysis Outflow Stage Compression Section Depth
Structural analysis concrete strain rate
Extraction results of maximum compressed section depth by wall height

5. Review contents

  • Concrete and rebar temperature distribution

  • Design review according to ULS load combination

  • Concrete liquid tightness

  • concrete destruction

  • Rebar temperature and stress level à cold rebar placement section

  • Necessity of vertical/horizontal prestress adjustment

제목-없음-90
200k Spillage and AfterShock
Implementation date: 2023 Tank type: 200,000 m3 Full Containment LNG storage Tank
제목-없음-8
200k LNG Tank leak analysis
Date of implementation: 2021 Tank type: 200,000 m3 Full Containment LNG storage Tank
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Review of 270k LNG Tank opening
Date of implementation: 2021 Tank type: 270,000 m3 Full Containment LNG storage Tank

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