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<p>The responses of buried pipelines crossing faults are more vulnerable to damage due to permanent ground deformations during earthquakes. However, these damages are depending on the development of strains and stresses in the pipelines which are governed by the soil type, such as homogeneous and heterogeneous, as well as its conditions and the intensity of seismic loading. The present study explores the responses of pipeline passing through the heterogeneous soil subjected to different range of permanent ground deformations arise due to fault movement. The pipeline passing through sand soil reflects significantly lesser value of axial strain in comparison to <i>c</i>-<i>ϕ</i> soil, pure clay soil and pure clay mix <i>c</i>-<i>ϕ</i> soil. Moreover, the developed peak axial strain in compression side of pipeline, passes through heterogeneous soil, is significantly higher than the tension side, which reflects buckling of pipeline. However, the development of localized strains in pipelines either in tension or compression side depends on the soil type and the intensity of fault movement triggered by the earthquakes.</p>

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Response of unpressurized buried pipeline passing through heterogeneous soil strata subjected to permanent ground deformations: a FEM approach

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • Navnit Kumar,
  • Shiv Shankar Kumar

摘要

The responses of buried pipelines crossing faults are more vulnerable to damage due to permanent ground deformations during earthquakes. However, these damages are depending on the development of strains and stresses in the pipelines which are governed by the soil type, such as homogeneous and heterogeneous, as well as its conditions and the intensity of seismic loading. The present study explores the responses of pipeline passing through the heterogeneous soil subjected to different range of permanent ground deformations arise due to fault movement. The pipeline passing through sand soil reflects significantly lesser value of axial strain in comparison to c-ϕ soil, pure clay soil and pure clay mix c-ϕ soil. Moreover, the developed peak axial strain in compression side of pipeline, passes through heterogeneous soil, is significantly higher than the tension side, which reflects buckling of pipeline. However, the development of localized strains in pipelines either in tension or compression side depends on the soil type and the intensity of fault movement triggered by the earthquakes.