Abstract
Seismic activity of small, medium or high intensity has a destructive effect on existing water supply and distribution networks. In the scholar literature, these are included in Class I—Vital Performance Systems, whose operation must be uninterrupted in case of a seismic event. Water networks are also essential for the safe operation of certain critical subsystems in the event of an earthquake (fire-extinguishing systems, etc.), in order to avoid loss of human lives, reduce adverse environmental impacts and limit damage caused by fires. The article proposes a seismic safety system for the water transport pipelines obtained by designing, executing and testing an experimental design, a system that can be used to increase the seismic resilience of the water supply and distribution network pipelines. The experimental data obtained were verified on the basis of the theoretical data available in the literature. The results of the research are particularly useful and can be proposed for use from the stage of designing new networks to providing expertise for existing networks, for establishing the most-stressed areas in which to be installed, and for implementing both execution and at the same time rehabilitation and upgrading.
Highlights
The buried pipes for water distribution show a series of behavioural peculiarities both for static actions and for dynamic actions and especially for seismic action [1]
Among the dynamic actions to which the buried pipes must undergo stress are those from the street traffic due to transport, the hydrodynamic pressure resulting from a sudden or very rapid change of the water flow regime, and among the most significant, seismic action [2]
Even for low dynamic actions, such as those arising from heavy-duty transport or ram impact, solutions to protect the water pipeline are inefficient and for seismic actions they are totally lacking
Summary
The buried pipes for water distribution show a series of behavioural peculiarities both for static actions and for dynamic actions and especially for seismic action [1]. Even for low dynamic actions, such as those arising from heavy-duty transport or ram impact, solutions to protect the water pipeline are inefficient and for seismic actions they are totally lacking. Practice has revealed that adductions and distribution networks are the most vulnerable to seismic action [4] Their sensitivity to this type of action, even if of low intensity, is caused by the fact that. The degree of vulnerability of water supply and distribution networks has led to the adoption of specific strategies for the protection of these structures against seismic activity (e.g., designing of expansion sleeves at the points of rigid pipe connections and the dimensioning of pipeline bridges to seismic stresses of a higher category with a unit of the seismic area of the site)
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