Abstract
When a long distance oil pipeline crosses an earthquake disaster area, inertial force and strong ground motion can cause the pipeline stress to exceed the failure limit, resulting in bending and deformation failure. To date, researchers have performed limited safety analyses of oil pipelines in earthquake disaster areas that include stress analysis. Therefore, using the spectrum method and theory of one-dimensional beam units, CAESAR II is used to perform a dynamic earthquake analysis for an oil pipeline in the XX earthquake disaster area. This software is used to determine if the displacement and stress of the pipeline meet the standards when subjected to a strong earthquake. After performing the numerical analysis, the primary seismic action axial, longitudinal and horizontal displacement directions and the critical section of the pipeline can be located. Feasible project enhancement suggestions based on the analysis results are proposed. The designer is able to utilize this stress analysis method to perform an ultimate design for an oil pipeline in earthquake disaster areas; therefore, improving the safe operation of the pipeline.
Highlights
Seismic activity is a sudden movement of the earth’s crust caused by a rapid release of earth crust energy
According to statistical data provided by the Federal Emergency Management Agency (FEMA), there are two types of pipeline failure caused by earthquakes: pipeline breakage (80% of total accidents) and pipeline leakage (20% of total accidents)
After building the dynamic load and combining the working conditions, the CAESAR II software can produce the dynamic stress analysis report, which includes the details of the pipeline stress, displacement, constraints loading, etc
Summary
Seismic activity is a sudden movement of the earth’s crust caused by a rapid release of earth crust energy. Different pipeline stress analysis methods, based on different seismic resistance concepts, are used. The stress calibration of an oil pipeline in an earthquake disaster area includes dynamic and static loads, and their calibration bases are different.
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