Evaluation Method For Behaviour Of Pipelines
During Earthquakes
Author(s)
K. Fuchida
Abstract
This paper presents a synthetic evaluating method for the seismic behaviour of
pipelines during earthquakes. The proposed method consists mainly of three
analytical methods, which are the reliability analysis method for lifeline
networks, seismic response analysis of surface ground layers and the pseudo
static response analysis of buried pipelines. The reliability analysis method for
lifeline networks is based on the Monte Carlo method. The seismic response
analysis method is two-dimensional effective stress analysis based on Biot’s
two-phase mixture theory and Iai’s constitutive equation. The pipeline analysis is
based on the beam theory on an elastic foundation and modified transfer matrix
method. Numerical computations are performed for models with various
conditions of ground and pipes. As a result, axial and lateral response
characteristics of pipelines are shown and evaluated by relating with
earthquakes, grounds and pipelines conditions.
Keywords: response analysis, pipeline, surface layers, reliability, network, cost.
1 Introduction
Severe damage to lifeline systems during earthquakes greatly affects the social
activity and urban life of citizens. It is very important that aseismic investment
for lifeline systems is performed in view of the fast recovery of economical and
social works in urban areas after earthquakes.
This study aims to propose a synthetic evaluation method for pipelines
constituting a network system during earthquakes. The proposed method consists
of three analytical methods. From a perspective viewpoint, the whole network
system is investigated and weak pipelines are extracted. Then, the responses of
Keywords
response analysis, pipeline, surface layers, reliability, network, cost.
Related Book
Other papers in this volume
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