Abstract
Abstract. Iran is located on the Alpide earthquake belt, in the active collision zone between the Eurasian and Arabian plates. This issue makes Iran a country that suffers from geotechnical seismic hazards associated with frequent destructive earthquakes. Also, according to the rapid growth of population and demands for construction lifelines, risk assessment studies which should be carried out in order to reduce the probable damages are necessary. The most important destructive effects of earthquakes on lifelines are transient and permanent ground displacements. The availability of the map of the displacements caused by liquefaction, landslide, and surface fault rupture can be a useful reference for researchers and engineers who want to carry out a risk assessment project for each specific region of the country. In this study, these precise maps are produced and presented by using a considerable number of GIS-based analyses and by employing the HAZUS methodology. It is important to note that a required accuracy for risk assessment is approximately around the macro scale. So, in order to produce a suitable map for risk assessment goals, in terms of accuracy, the GIS-based analyses are employed to map all of Iran.
Highlights
For risk assessment of lifelines and infrastructure which are widespread throughout the country, investigating the transient ground displacement (TGD) and permanent ground displacement (PGD) is of vital importance
The susceptibility assessment of infrastructures is crucial in the modern era due to the very rapid growth of population and major cities, which are mostly located on or in the vicinity of earthquake faults, and demands the construction of infrastructure that is susceptible to earthquake hazards
The geotechnical seismic hazard which can affect the serviceability of lifelines during or after earthquakes can be classified into two categories: transient ground displacement (TGD) caused by seismic wave propagation and permanent ground displacement (PGD), which refers to liquefaction, landslide, and surface fault rupture
Summary
A map of ground displacement due to surface rupture is produced via a GIS-based approach and the HAZUS methodology. The novelty of this study is the macro zonation of the PGD caused by earthquakes all over Iran, and the presentation of the first map of fault displacement, which can affect the lifelines it is near to or crosses. Since investigating and quantifying the seismic hazards is the first step to evaluating the seismic-induced damages to any lifelines, the output of the current study, in the form of PGD and TGD maps, can be considered as one of the most important input data for the lifeline seismic risk assessment projects. An available liquefaction and landslide susceptibility map was employed to produce the PGD maps using HAZUS methodology and GIS-based analyses. The fault maximum displacement map is produced using a fault maximum magnitude map, which was presented previously by Karimiparidari (2014)
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