NEHRP Clearinghouse

Title
A Method for the Analysis of Seismic Reliability of Lifeline Systems.
File
PB80157738.pdf
Author(s)
Mohammadi, J.; Ang, A. H. S .
Source
National Science Foundation, Washington, DC. Engineering and Applied Science., February 1980, 117 p.
Identifying Number(s)
UILU-ENG-80-2004
Abstract
A fault-rupture model is applied to the seismic risk analysis of a lifeline system and a companion model is developed for evaluating the hazard of fault-rupture strike on a lifeline system to potential earthquakes. Because of the importance of near-source regions in the seismic risk analysis of a lifeline system, an attenuation equation for the near-source region was developed based on an analytical study. Two modes of failure were considered: the fault-rupture striking one or more links of a lifeline, and the overstressing of sections of a lifeline caused by high ground shaking during an earthquake. The term 'lifeline system' refers to networks of man-made or engineered systems (oil pipelines, water distribution systems, communication, and transportation networks) covering vast surface areas. The method presented for evaluating seismic safety of lifeline systems in two modes is useful and necessary for a risk-based approach to the design of lifelines against earthquake hazards. In evaluating seismic reliability of the entire lifeline system, correlation between different paths is important and must be considered.
Keywords
Seismic waves; Public utilities; Dynamic structural analysis; Earthquake engineering; Earthquake resistant structures; Transportation; Risk analysis; Earthquakes; Pipelines; Communication equipment; Water supply; Seismic risk