A simplified fragility analysis methodology for containment structure subjected to overpressure condition

Jin, Song; Li, Zhongcheng; Dong, Zhanfa; Lan, Tianyun; Gong, Jinxin

doi:10.1016/j.ijpvp.2020.104104

Cited by 18 publications

(1 citation statement)

References 36 publications

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“…Adoption of the equivalent linear approach for modeling the soil medium is considered to be adequate for the expected level of soil strains under seismic wave propagation. For the steel pipe, elastic-perfectly plastic behavior can be also assumed like as many other research works including modeling of steel pipe, such as Jin et al [30].…”

Section: Materials Propertiesmentioning

confidence: 99%

An Equation to Estimate Maximum Normal Strain of Buried Steel Pipes at Bend Area Under Propagating Waves in Sands

Behnamfar

Mohammadi

2021

Scientia Iranica

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The possible vulnerability of pipelines under propagating waves especially at bend area emphasizes the need of studying in this context. In the presented studies in this field the beam and beam-shell hybrid models were usually used but in this study a continuum model is examined. For this purpose, the bent pipe is modeled by shell elements and suitable boundary conditions are considered to simulate the infinite length of the pipe away from the bend. The soil around the pipe is modeled by 3D elements obeying the Mohr-Coulomb rule of behavior. Also, equivalent boundary conditions are used at the boundaries of the soil domain where it is truncated. By varying the properties of the pipe-soil model, it is investigated under seven different ground motions and the maximum axial strain is calculated at the bend area. Effects of different parameters including incidence angle of seismic waves, bend angle, pipe diameter to wall thickness ratio, and physical properties of soil are investigated. Using the results of analysis and regression, an equation is proposed for estimating the maximum normal strain of buried pipes at the bend area with good accuracy.

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Section: Materials Propertiesmentioning

confidence: 99%