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Dynamic Reliability of Buried Pressure Pipelines Subjected to Random Space-Time Earthquake Load

Volume 15, Number 1, January 2019, pp. 179-189
DOI: 10.23940/ijpe.19.01.p18.179189

Peng Zhanga, Yihuan Wangb, and Guodong Xianc

aSchool of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu, 610500, China
bSchool of Mechanical and Electrical Engineering, Southwest Petroleum University, Chengdu, 610500, China
cPetro-China Southwest Pipeline Company, Chengdu, 610500, China

(Submitted on October 6, 2018; Revised on November 16, 2018; Accepted on December 18, 2018)

Abstract:

Earthquake ground motion is a random process, and each response of a structure can be implemented as a random process. A large scale structure of the long buried pressure pipelines have the random variation of the space-time seismic load. A random space-time seismic load model is established by studying the time-varying and spatial characteristics of seismic load. Combined with the theory of fluctuation, the dynamic response of the buried pipeline is analyzed, and the dynamic response of the buried pressure pipeline is established by using the Von-Mises strength theory under the internal pressure. Based on the simplified formula of theoretical analysis, the first order second moment reliability method and the first transcendental failure theory are used to analyze the dynamic reliability of buried pipeline under random space-time seismic load, and the application of the method is analyzed. Dynamic reliability analysis methods for real application are validated. The feasibility of the proposed method is verified by combining the Wenchuan Earthquake. The study shows that it is necessary to consider the characteristics of random space-time seismic load when seismic damage analysis of long buried pressure pipeline, which lays the foundation for the theory of random space-time vibration.

 

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