The goal of this study is to develop probabilistically based
empirical correlations for seismic performance assessment of buried
pipelines. Within the scope of these research efforts, pipeline
performance case histories have been compiled from Duzce city after
Duzce earthquake. The characteristics of Duzce water supply and
distribution system with the earthquake damage on the system were
studied. Correlations of the damage patterns with the water distribution
system, earthquake and geotechnical characteristics have been
developed. Moreover spatial distributions of the earthquake effects havebeen transferred into Geographic Information System (GIS) format. As a
result of these studies, it was intended to define the seismic,
geotechnical and structural parameters which may explain the spatial
variability of the observed seismic pipeline hazard.
For the development of such correlations, a maximum likelihood
framework for the probabilistic assessment of seismically induced buried
pipeline performance is described. A database, consisting of postearthquake
field observations of buried pipeline performance after Duzce
earthquake in conjunction with in-situ index test results, is used for the
development of probabilistically based seismic pipeline performance
correlations. As a result of careful processing of available data, the
variables of the problem are selected as: liquefaction susceptibility of
soil, thickness of soft soil layer if it exists, peak ground acceleration and
estimated ground deformations. A limit state function is defined in terms
of these variables. Repairs on the pipeline system due to earthquake are
compiled with the surrounding soil and earthquake parameters and the
correlations of pipeline performances with the mentioned variables are
determined. Different sets of fragility curves are developed for seismic
pipeline performance problem, representing various sources of
uncertainty that are intrinsic to the problem. Such information is believed
to be useful to utility system operators in planning a seismic retrofit or
upgrade program for existing pipeline systems.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/1063197/index.pdf |
| Date | 01 July 2003 |
| Creators | Yargici, Volkan |
| Contributors | Cetin, Kemal Onder |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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