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Seismic Reliability Analyses of Large Scale Lifeline Networks

by Tadanobu Sato, Kyoto Univ, Kyoto, Japan,
Kenzo Toki, Kyoto Univ, Kyoto, Japan,



Document Type: Proceeding Paper

Part of: Lifeline Earthquake Engineering

Abstract:

For assesing the seismic reliability of large scale lifeline networks we developed an algorithm which had only polynomial complexity to enumerate paths in the network. Using this algorithm we have developed two program packages. One is composed of a vectorized program to increase computing efficiency and the other is a program coded by a new approximate calculation scheme, named as the point matching method. The vectorized program can solve seismic reliability of a network with up to 3500 elements using the super computer, FACOM VP-400E. If the number of elements of network exceed 3500, only the point matching method can provide a feasible solution from the practical stand point of computing time. This program can also ran on a 32 bit desktop computer with the main memory of 16 MB and the operation time of 5.3 MIPS. This program package offers you an interactive capability, to select supply and demand nodes as well as show them on screen. To check the applicability of the program package, we considered two gas supply networks composed of 3529 and 19522 elements.

Subject Headings: Seismic tests | Seismic effects | Lifeline systems | Gas pipelines | Algorithms | Natural gas | Computer networks

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