Abstract
Dysfunctions and failures of buried pipe networks, like sewer networks, are studied in this paper from the point of view of structural reliability and heterogeneity of geotechnical conditions in the longitudinal direction. Combined soil spatial variability and Peak Ground Acceleration (PGA) induce stresses and displacements. A model has been developed within the frame of geostatistics and a mechanical description of the soil–structure interaction of a set of buried pipes with connections resting on the soil by a two-parameter model (Pasternak model). Structural reliability analysis is performed considering two limit states: Serviceability Limit State (SLS), related to large "counter slope" in a given pipe, and Ultimate Limit State (ULS), corresponding to bending moment.
Highlights
Pipes that carry various substances need to be designed in a way capable of reducing the damage caused by ground displacements induced by earthquakes
Combined soil defects and Peak Ground Acceleration (PGA) induce stresses and displacements
A model which includes a description of the soil's spatial variability, within the frame of geostatistics has been developed in this paper
Summary
Pipes that carry various substances need to be designed in a way capable of reducing the damage caused by ground displacements induced by earthquakes. Most buried pipelines in seismic areas have sustained substantial damage in the past due to earthquake events [2]. Dysfunctions and failures of buried pipe networks, like sewer networks, are mainly caused by the heterogeneity of geotechnical conditions in the longitudinal direction and of the applied (seismic) action. Combined soil defects (differential settlements along the pipe, landslides, voids surrounding the pipe, etc.) and Peak Ground Acceleration (PGA) induce stresses (which lead to an Ultimate Limit State-ULS) and displacements (which constitute a violation of the Serviceability Limit State-SLS). The response of buried pipe is investigated considering the seismic excitation by selecting real earthquake data
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