Abstract
The paper presents the results of the expert works in the area of diagnostics, repair, and reconstruction of the steel pipelines of the transit gas pipeline (TP) on Slovak territory. One part of our work included dynamic measurements of a steel casing pipe located under the railway. This pipeline was damaged by corrosion and it was necessary to evaluate its safety.
Highlights
The fact that the pipe stress state changed during the train's passage is a proof that the load is transferred from the guard to the pipe via the centring rings
The experimental measurement of dynamic loading of gas pipeline and its casing was used as a basis for preparing and calibrating a numerical FEM model
This model was used for stress level analysis of a pipeline damaged by corrosion
Summary
Department of steel and timber structures of SUT in Bratislava has provided designs and experimental measurements on transit gas pipelines from 1998 until today. In these years methodology of short and long term measuring of strains has been developed. The behaviour of pipeline in landslides was examined and measures in case of sudden landslide were proposed. The influence of the dynamic effects of the load on the pipeline is currently being investigated. The pipeline is effected by various dynamic loads as technical seismicity [1, 2], traffic [3] and stochastic loads [4]. Fatigue damage estimation by dynamic load was studied in [5, 6]. Interaction of buried pipeline with Soil under different loading cases was examined in [7]. The previous works focused on maintenance procedures and reparations of gas pipeline components were published in [8, 9].
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