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۱Evaluation of the Equivalent Number of Cycles in Liquefaction Potential Study Using Energy Approach
نویسنده(ها): ،
اطلاعات انتشار: چهارمین همایش بین المللی مهندسی ژئوتکنیک و مکانیک خاک ایران، سال
تعداد صفحات: ۸
The equivalent number of cycles concept is used essentially for evaluating soil liquefaction potential. N is used to convert irregular cycles in a time history of vibration in soil layers resulted from site response analysis into regular motions with uniform cycles required for assessment of soil liquefaction potential. Several methods have been proposed to estimate the equivalent number of cycles. In this study, these methods and their efficiency as well as interrelations are discussed. Then, the number of equivalent cycles is assessed from energybased method, using the calculated dissipated energy in each layer of soil deposit and from hysteresis loops. This is achieved through a nonlinear site response analysis. It will be described how to evaluate N from energy–based concepts. It is shown that despite of the other concepts, energy–based method’s results are more precisely and can be used to evaluate soil liquefaction potential.<\div>

۲SOIL LIQUEFACTION POTENTIAL ASSESSMENT USING NONLINEAR SITE RESPONSE ANALYSIS
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله، سال
تعداد صفحات: ۷
soil liquefaction is a major cause of damage during earthquakes. Over the past years major advances have occurred in evaluation of soil liquefaction potential. This rapid evolution in assessment of liquefaction potential has led to a various methods for evaluation of this phenomenon. although the rate of progress has been laudable further advances are occurring and more remains to be done.<\div>

۳ALTERATIONS OF EQUIVALENT NUMBER OF CYCLES IN DEPTH OF SOIL PROFILE.
نویسنده(ها): ،
اطلاعات انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله، سال
تعداد صفحات: ۷
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.<\div>
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