Emad Gheibi - Graduate Student in Geotechnical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
Mohammad. H. Bagheripour - Assistant Professor, Civil Engineering Department, Shahid Bahonar University of Kerman, Kerman

the equivalent number of cycles Neq is a fundamental and applicable concept in geotechnical earthquake engineering . The basic assumption of N eq is that an irregular and random load which is representative of earthquake loads . Can be evaluated by the regular motions that have the same harmful effect on the soil or any other material despite of the significance of this parameter in geotechnical earthquake engineering and liquefaction assessment subjects few applicable methods have proposed to determinal Neq.

equivalent number of cycles, energy approach , nonlinear site response analysis and soil profile