Failure of important supporting structural systems such as pipelines carrying water from the faraway source may be disastrous to the site environment and lead to public clamor. Such events resulting from blasts (intentional/unintentional) do not give any warning of impending failure as their duration is very short and intensity is very high as compared to other loadings excited by the earthquake. Therefore, the investigations for the response of buried pipelines under explosive loading are of considerable interest. This study is executed for numerical analyses using an advanced coupled Eulerian-Lagrangian finite-element (CEL-FE) approach to predict the anti-blast performance of a buried steel pipeline loaded by on- and below-ground blast loading. A 3D numerical model of the buried pipeline is first created in the ABAQUS software and analyses are performed with ABAQUS built-in explicit module to investigate the role of carried liquid (e.g., water) on the anti-blast response of the pipeline. The considered pipeline is seamless and has an outer diameter of 1e+03 mm, a wall thickness of 1e+01 mm, and a total length of 12000 mm; typical dimensions for water, gas, and oil transmission pipelines. It is buried in a brown clayey soil medium at a depth of 2000 mm (= 2 x pipe diameter) below ground level. Simplified Johnson-Cook plasticity (JCP), Jones-Wilkins-Lee (JWL)-Equation-of-State (EOS), ideal gas EOS, Us Up Hugoniot EOS, and Mohr-Coulomb plasticity (MCP) constitutive models, respectively, are considered to define material properties for the pipeline, TNT, air, water, and soil medium. Responses are compared and discussed. Significant improvement in the blast performance of the pipeline carrying 50% water has been observed in terms of dynamic response and damage compared to the empty pipeline showing that the water proactively contributes to protecting the pipeline from getting severely damaged by the blastwaves.

来源平台：EARTHQUAKE RESISTANT DESIGN, PROTECTION, AND PERFORMANCE ASSESSMENT IN EARTHQUAKE ENGINEERING, AERS 2023