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Analysis and Design

Analysis and Design

Based on over 20 years of practical experience, we provide analysis and design services related to LNG storage tanks.

We use the structural analysis program LUSAS LNG System as a basis, and have extensive experience in all types of analysis required for LNG storage tank design, including static analysis, thermal analysis, dynamic analysis, nonlinear analysis, and heat of hydration analysis. We have extensive experience in EN, ACI, ASCE, etc. Perform design review accordingly.

Consulting example

1. Design Checks

We perform design reviews on design load combinations.

Example of ULS review according to PM correlation (graph format)
Example of ULS review according to PM correlation (Conta format)
Example of summary of ULS design review results (PM correlation review)
Example of summary of ULS design review results (full review)

2. Foundation settlement analysis

By modeling the ground using a nonlinear material model for each stratum and analyzing the settlement amount, a ground analysis model considering ground-structure interaction is constructed, comparison and correction with test results are performed, and basic design is reviewed from the analysis results. Derive the data and boundary conditions required for detailed analysis.

Ground analysis example

In the case of spread foundations, sliding studies due to earthquakes are sometimes performed by using a three-dimensional solid model and applying nonlinear boundary conditions expressing friction resistance and sliding.

Deck and ground boundary modeling examples
Tank and ground modeling examples
Sliding review example

3. Seismic Analysis

Cross-sectional forces for use in tank design load combinations are extracted through seismic analysis that considers Fluid-Soil-Structure Interaction (FSSI).

FSSI earthquake analysis model concept diagram
Earthquake response spectrum example
Time history seismic wave example
Example of seismic isolation device characteristics and analysis results
Example of seismic isolation device characteristics and analysis results
Example of earthquake analysis results
Example of secondary response spectrum derivation

4. Spillage Analysis

Assuming that the low-temperature LNG fluid stored in the inner tank leaks, thermal analysis is performed to examine the stability against temperature shock on the wall of the outer tank, and structural analysis is performed using the results of the thermal analysis as input values ​​to ensure structural stability. and review the liquid tightness of the outer tank.

Interpretation order
Thermal analysis and structural analysis results
Wall rebar temperature distribution
Wall reinforcement stress distribution
Examination of cracks and compression sections within the wall cross section

5. Aftershock analysis (AfterShock)

Assuming that an earthquake occurs in a spill situation, seismic analysis and spill analysis are performed in one nonlinear analysis model.

6. Fire Analysis

Safety studies are conducted assuming various fire situations. After performing thermal analysis, structural stability is evaluated from structural analysis using the thermal analysis results as input.

Example of temperature distribution by time zone in case of fire (adjacent fire)
Example of rebar temperature distribution by time period

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