Reliability of Lifeline Networks under Seismic Hazard

Date

1999-01-01

Author

Kestel, Sevtap Ayşe

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Lifelines, such as pipelines, transportation, communication and power transmission systems, are networks which extend spatially over large geographical regions. The quantification of the reliability (survival probability) of a lifeline under seismic threat requires attention, as the proper functioning of these systems during or after a destructive earthquake is vital. Ln this study, a lifeline is idealized as an equivalent network with the capacity of its elements being random and spatially correlated and a comprehensive probabilistic model for the assessment of the reliability of lifelines under earthquake loads is developed. The seismic hazard that the network is exposed to is described by a probability distribution derived by using the past earthquake occurrence data. The seismic hazard analysis is based on the ''classical'' seismic hazard analysis model with some modifications. An efficient algorithm developed by Yoo and Deo (Yoo YB, Deo N. A comparison of algorithms for terminal pair reliability. IEEE Transactions on Reliability 1988; 37: 210-215) is utilized for the evaluation of the network reliability. This algorithm eliminates the CPU time and memory capacity problems for large networks. A comprehensive computer program, called LIFEPACK is coded in Fortran language in order to carry out the numerical computations. Two detailed case studies are presented to show the implementation of the proposed model.

Subject Keywords

System reliability, Network, Terminal pair reliability, Lifelines, Earthquake, Seismic hazard analysis, Poisson model, Path set enumeration method, Scale of fluctuation, Spatial correlation

URI

https://hdl.handle.net/11511/31748

Journal

Reliability Engineering Safety

DOI

https://doi.org/10.1016/s0951-8320(98)00098-2

Collections

Graduate School of Applied Mathematics, Article

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Citation Formats

S. A. Kestel, “Reliability of Lifeline Networks under Seismic Hazard,” Reliability Engineering Safety, pp. 213–227, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31748.