LNG Tank in Świnoujście: Nonlinear Analysis of the Tank Dome Elements Behaviour

Sobczyk, Bartosz

doi:10.2478/pomr-2020-0074

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…Finally, we filtered the data for the selected cross-section and modelled points into polynomial deflection. We anticipate that our methodology will be applicable to the confirmation of numerical calculations on other structures [ 62 ] or bridges, which form the core of our team’s work [ 63 ].…”

Section: Discussionmentioning

confidence: 99%

Bridge Non-Destructive Measurements Using a Laser Scanning during Acceptance Testing: Case Study

2022

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Owing to the recent proliferation of inventory works on roads and railways, bridge acceptance tests have increased exponentially. These tests’ results are often misinterpreted owing to the use of various measuring equipment types, rendering integrated interpretation problematic. It is also problematic that adjusting the measurement method is difficult when the structure’s response to load is uncertain. Therefore, it is important to observe the largest possible range of possible deformations. For this reason, the present study suggests a novel approach to bridge non-destructive measurements using a laser scanner during acceptance testing. The main advantage of our method is the ability it affords to observe all points of the structure during testing, an ability that is extremely important is the absence of unambiguous data regarding the bridge’s condition. To significantly increase the scanning accuracy (up to 0.5 mm), measurements from a limited number of linear sensors are used (whose accuracy is up to 0.1 mm). To achieve optimal accuracy, we performed the following steps: first, we adapted the precision requirements to the numerical project. For this purpose, we used potentiometric sensors to measure linear deformations. Next, we performed laser scanning measurements from two scan positions. Finally, we filtered the data for the selected cross-section and modelled the points into polynomial deflection. The performed tests confirmed that the structure’s response was as predicted by the FEM model, and the object was approved for use. Our future tests will be based on the selection of a structure with minimal measurement errors, and the results will be compared using a total station, ensuring the highest possible quality of service, which can be repeated in simple steps. As study objects, we presented two items: the first without proper calibration on a linear sensor and the second using linear sensors to present the highest possible accuracy of our experiment.

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Section: Discussionmentioning

confidence: 99%

Bridge Non-Destructive Measurements Using a Laser Scanning during Acceptance Testing: Case Study

2022

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Stress Assessment of a Steel Bullet LPG Tank Under Differential Settlement Based on Geodetic Measurements and Sensitivity Analysis

Ferenc,

Gierasimczyk,

Mikulski

2024

Polish Maritime Research

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This paper presents an analysis of a steel bullet LPG tank in operation at a base in Poland. The structure was set on a sand-gravel pillow and rigid concrete slab, and its settlement was periodically measured at five measuring points along the structure. After a few years, differential settlement was observed. Based on geodetic data, we attempt to assess the current stress level in the structure. The proposed methodology uses a sensitivity analysis apparatus. A numerical model of the structure and sand-gravel pillow is analysed using the finite element method, and the impact of variation in the stiffness of the sand-gravel pillow on the vertical displacement of the tank is determined. The algorithm involves six iterations of calculations, and after each iteration, the stiffness modified sand-gravel pillow is determined. After the sixth iteration, the vertical displacement in the FEM model is found to be similar to the measured values in the real structure. The results obtained after the last iteration are used to assess the stress state in the bullet tank’s shell structure.

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LNG Tank in Świnoujście: Nonlinear Analysis of the Tank Dome Elements Behaviour

Cited by 2 publications

References 15 publications

Bridge Non-Destructive Measurements Using a Laser Scanning during Acceptance Testing: Case Study

Bridge Non-Destructive Measurements Using a Laser Scanning during Acceptance Testing: Case Study

Stress Assessment of a Steel Bullet LPG Tank Under Differential Settlement Based on Geodetic Measurements and Sensitivity Analysis

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