Mansour Ghalehnovi - Assistant Professor, Department of civil engineering, ferdowsi University of mashhad
Mohsen Rashki - Msc student , University of sistan & baluchestan
Mahdi Rostamiyan - Msc student

Observations of damages during numerous historical earthquakes have shown that in addition to the structural stability, geological factors and site conditions also play a major role in final stability of structures. Two important types of mentioned geotechnical phenomena that cause ground failure are liquefaction and landslides, which can take a variety of forms: settlement, cracking and fissuring, sinking, surface fault displacement, etc. In the frame of this paper, liquefaction and landslides definition, mechanism, their difference and influence of site condition on damage intensity are presented. This paper also investigated geotechnical consideration of Iranian code of seismic resistant design by studing on liquefaction and landslides characters and finally, effective hazard reduction methods are presented.

Earthquake, Liquefaction, Landslide, Damage, Hazard mitigation