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

doi:10.23940/ijpe.19.01.p18.179189

Abstract

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.

Key words: buried pipeline, seismic load, random space-time, dynamic reliability, first order second moment method

Peng Zhang, Yihuan Wang, and Guodong Xian. Dynamic Reliability of Buried Pressure Pipelines Subjected to Random Space-Time Earthquake Load [J]. Int J Performability Eng, 2019, 15(1): 179-190.

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