Application of Nonlinear Pushover Analysis on Buried Water Pipelines under Faulting
Date Issued
2011
Date
2011
Author(s)
Chen, Zhen-Hao
Abstract
When continuous buried water pipeline is subjected to fault movement, damage is inevitable and water supply may be affected. In order to investigate the local buckling behavior of buried water pipelines under faulting, sophisticated finite element method may be adopted and the pipeline is simulated by using shell element. However, in practice, numerical analysis of buried pipelines under faulting with shell element is too complicated and time consuming for engineers. Hence, a method for nonlinear pushover analysis of buried water pipelines under faulting is proposed in this study. Nonlinear moment and axial plastic hinges are developed for the pipelines. Described in terms of plastic hinges, the nonlinear behavior of the pipelines can be simply simulated by using beam elements. In addition, restoring force provided by the surrounding soil is simulated by nonlinear link. Given the angle of faulting relative to the pipeline, nonlinear pushover analysis can be conducted. From the result of the analysis, the failure mode of the pipeline and the corresponding allowable faulting movement can be achieved. This information is useful for the design of buried pipelines in seismically active areas.
Subjects
buried water pipeline
fault movement
local buckling
plastic hinge
nonlinear pushover analysis
Type
thesis
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