Abstract
The main purpose of this study is to develop a Geospatial Information System (GIS) model with the ability to assess the seismic damage to pipelines for two well-known hazards, including ground shaking and ground failure simultaneously. The model that is developed and used in this study includes four main parts of database implementation, seismic hazard analysis, vulnerability assessment and seismic damage assessment to determine the pipeline’s damage probability. This model was implemented for main water distribution pipelines of Iran and tested for two different earthquake scenarios. The final damage probability of pipelines was estimated to be about 74% for water distribution pipelines of Mashhad including 40% and 34% for leak and break, respectively. In the next step, the impact of each earthquake input parameter on this model was extracted, and each of the three parameters had a huge impact on changing the results of pipelines’ damage probability. Finally, the dependency of the model in liquefaction susceptibility, landslide susceptibility, vulnerability functions and segment length was checked out and specified that the model is sensitive just to liquefaction susceptibility and vulnerability functions.
Highlights
Over the past decades, casualties due to natural disasters have increased in the world
The results showed that a Peak Ground Velocity (PGV)-based fragility relation is the best option for Mexico City’s water system [15]
According to the complexities in the method of pipelines’ damage assessment, the number of parameters and the information layers that play an important role in damage analysis, modeling using an appropriate system like the geospatial information system is required
Summary
Casualties due to natural disasters have increased in the world. Iran’s position on the Alpine-Himalayan seismic belt puts this country among one of the world’s earthquake-prone countries, and according to geological studies, about 97% of Iran’s cities and villages are subjected to earthquake danger [2] In these earthquakes, most damages are related to critical infrastructures; and the study of the damages’ history due to the world’s destructive earthquakes indicates the importance of lifelines’ failure’s share of the losses. Lifelines are crucial lines for the survival of urbanization in the modern world These lifelines are used to produce and distribute goods and services in urban units, and life possibility in cities depends on the quality and the quantity of these lifelines’ function. Small and short-time fluctuations in the main water distribution pipelines’ service have wide effects on the performance of the entire urban water distribution network
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