Experimental and Finite-Element Study of Buried Pipes Connected by Bellow Joint under Axial Cyclic Loading

Lv, Yang; Li-rong, Liang; Li, Yanwei; Chen, Yu; Chouw, Nawawi

doi:10.1061/(asce)ps.1949-1204.0000524

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…In previous studies, performance evaluation was performed on buried piping systems with bellows expansion joints under repeated compressive and shear loads [12,13]. These studies targeted a short-length buried piping system and evaluated the performance based on the repeated loads of the piping system with and without bellows.…”

Section: Development Of Soil-bellows Piping System Interaction Fe Modelmentioning

confidence: 99%

“…The bellows-type expansion joint is a structure composed of several connecting thin convolutions. It has a large displacement capacity as its geometrical characteristics allow some axial and angular deformation [13]. An experimental test and FE analysis of the buried pipeline system with bellows were performed to evaluate the effect of reducing damage caused by fault rupture [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…It has a large displacement capacity as its geometrical characteristics allow some axial and angular deformation [13]. An experimental test and FE analysis of the buried pipeline system with bellows were performed to evaluate the effect of reducing damage caused by fault rupture [13,14]. A study analyzing the bellows' load capacity and energy dissipation was conducted using the FE method [15].…”

Section: Introductionmentioning

confidence: 99%

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Application of Seismic Fragility of Buried Piping Systems with Bellows Expansion Joints

et al. 2022

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Bellows expansion joints are known to have a large displacement capacity and can thus be potentially used to improve the seismic performance of buried piping systems. However, there are no guidelines on the installation of bellows expansion joints for the seismic performance improvement of buried piping systems. Furthermore, there are very few studies on the seismic performance of buried piping systems with bellows expansion joints. In this study, therefore, we performed seismic fragility analysis according to the installation conditions to obtain basic data for the installation guidelines of bellows expansion joints. Therefore, in this study, an experimental test was performed on bellows expansion joints considering the characteristics of earthquake loading conditions, and a 3D finite element (FE) model using the ABAQUS platform was developed and validated based on the experimental results. This model was verified by comparing the force-displacement relationship and energy dissipation. Leakage occurred at a displacement of 113.6 mm in the experiment, and the FE analysis result was also applied up to the same displacement. In the case of energy dissipation, an error between the FE model and experimental result was determined not to be significant. However, the appearance of such physical performance errors is due to the manufacturing errors resulting from the bellows forming process and the variability of material properties. Finally, seismic fragility analysis of buried pipeline systems with bellows expansion joints was performed. In addition, the following cases were used for analysis according to whether bellows were applied or not: (1) without a bellows expansion joints; (2) with a single bellows expansion joint; and (3) with two bellows expansion joints. In conclusion, it was found that the seismic performance of the buried pipeline system was improved when bellows were applied. However, the effect of the seismic fragility curve according to the increase in the number of bellows was insignificant.

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Section: Development Of Soil-bellows Piping System Interaction Fe Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of Seismic Fragility of Buried Piping Systems with Bellows Expansion Joints

et al. 2022

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“…They are highly adaptable to relatively large deformations due to their flexibility and low stiffness. As a result, well-designed bellows-type expansion joints can be applied to improve the seismic performance of piping [30]. However, very few studies of the current state of bellows piping joints have evaluated the structural performance or seismic performance of the expansion joints based on experimental data.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Seismic Performance Evaluation of Multi-Ply Bellows Type Expansion Joint for Piping Systems

et al. 2022

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Piping systems are a representative social infrastructure to provide oil, gas, and water. Damage to piping systems may cause serious consequences, such as fire, water outage, and environmental pollution. Therefore, piping systems need to be protected from natural disasters, such as earthquakes. Earthquakes may cause deformation that exceeds piping design criteria. For example, large relative displacements and liquefaction of the ground resulting in loss of strength and ground subsidence, and the side-sway of primary structures subjected to a strong ground motion may cause critical damage to piping systems. Therefore, expansion joints to maintain flexibility can be applied to locations where excessive deformation is expected to improve the seismic performance of piping systems. Metal bellows, a type of expansion joints, are flexible, so they are highly durable against deformation and fatigue loads. This indicates that metal bellows can be used as seismic separation joints for piping. In this study, experimental research was conducted to analyze the seismic performance of multi-ply bellows type expansion joints, a type of metal bellows. Monotonic loading tests and cyclic loading tests were conducted on 2-ply bellows and 3-ply bellows, and the results were compared. In the cyclic loading tests, multi-step increasing amplitude cyclic loading, which used the displacement history amplified in stages, and constant amplitude cycling loading with various magnitudes were considered. The test results showed no significant difference in bending performance for monotonic loading between the two types of multi-ply bellows. The 3-ply bellows, however, showed higher performance for low-cycle fatigue than 2-ply bellows.

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Influence of crossing fault position and site soil on the mechanical properties of bellows joint connected buried pipelines under direct shear

Li,

Lu,

et al. 2024

Urban Lifeline

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Buried pipeline systems are vulnerable to joint damage in earthquakes. Previous studies have shown that bellows joints are effective in increasing deformation capacity and reducing the axial force of the main pipeline. However, the effectiveness of bellows joints in enhancing the deformation capacity of the pipelines is affected by the location of the crossing fault and the soil at the site. This paper constructs and validates a finite element model of a buried steel pipeline connected by a bellows joint using ABAQUS to investigate this issue. The effects of fault location, soil properties, and internal pressure on the bellows joint connected pipelines were analyzed using a finite element model. The results indicate that the bellows joints exhibit the best energy dissipation and deformation enhancement when the fault passes directly through the joints. Bellows joints in soft soil are better at dissipating energy, reducing pipe deformation, and mitigating pipe damage compared to those in hard soils. The internal pressure is helpful to increase the mechanical properties of the pipelines. The findings can provide some guidance for pipeline design and mitigation strategies for ensuring the reliability and safety of buried pipeline systems in earthquake-prone areas.

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Experimental and Finite-Element Study of Buried Pipes Connected by Bellow Joint under Axial Cyclic Loading

Cited by 7 publications

References 14 publications

Application of Seismic Fragility of Buried Piping Systems with Bellows Expansion Joints

Application of Seismic Fragility of Buried Piping Systems with Bellows Expansion Joints

An Experimental Study on Seismic Performance Evaluation of Multi-Ply Bellows Type Expansion Joint for Piping Systems

Influence of crossing fault position and site soil on the mechanical properties of bellows joint connected buried pipelines under direct shear

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