دانلود رایگان مقاله انگلیسی بررسی اختلاف بین روابط ایجاد کننده روانگرایی خاک لرزه ای مبتنی بر سه SPT - الزویر 2018

عنوان فارسی
بررسی اختلاف بین روابط ایجاد کننده روانگرایی خاک لرزه ای مبتنی بر سه SPT
عنوان انگلیسی
Examination of differences between three SPT-based seismic soil liquefaction triggering relationships
صفحات مقاله فارسی
0
صفحات مقاله انگلیسی
12
سال انتشار
2018
نشریه
الزویر - Elsevier
فرمت مقاله انگلیسی
PDF
نوع مقاله
ISI
نوع نگارش
مقالات پژوهشی (تحقیقاتی)
رفرنس
دارد
پایگاه
اسکوپوس
کد محصول
E10049
رشته های مرتبط با این مقاله
مهندسی عمران
گرایش های مرتبط با این مقاله
سازه، زلزله
مجله
دینامیک خاک و مهندسی زلزله - Soil Dynamics and Earthquake Engineering
دانشگاه
Dept. of Civil Engineering - Middle East Technical University - Ankara - Turkey
کلمات کلیدی
مایع سازی خاک، روابط راه اندازی گدازش، زمین لرزه، خطر لرزه ای، بارگذاری سیکل، آزمون نفوذ استاندارد، آزمایش در محل، احتمال
doi یا شناسه دیجیتال
https://doi.org/10.1016/j.soildyn.2018.03.013
چکیده

ABSTRACT


The preceding companion paper presented the updating of the seismic soil liquefaction triggering relationship of Cetin et al. (2004) [1], and compared the resulting updated relationship with the earlier version. In this second paper, a detailed cross-comparison is made between three triggering relationships: (1) Seed et al. (1985) [2], as slightly updated by the NCEER Working Group (Youd et al., 2001 [3]), (2) Boulanger and Idriss (2012) [4], and (3) Cetin et al. [5]. Differences between these three triggering relationships, and the apparent causes of them are examined. Also studied are the impacts of these differences on levels of conservatism with regard to evaluation of liquefaction triggering hazard, and the resulting risks for engineering projects.

نتیجه گیری

Conclusion


For a given N1,60,CS value, the corresponding cyclic resistance values (i.e.: CRR) associated with any target level of likelihood of liquefaction triggering based on the relationships of (1) SEA1985, (2) BI2012 and (3) Cetin et al. [5] are observed to be significantly different. These differences occur at essentially all locations on the triggering curves, but they are most pronounced at low N1,60,CS values. For conditions corresponding to σ'v = 1 atm, the differences between the estimated CRR values reach as high as 50–80% in the critical region of N1,60,cs < 20 blows/ft within which the consequences of triggering of liquefaction can be especially significant due to low post-liquefaction strengths and high cyclic shear strain potential. This paper has examined the principal sources and causes of differences between the three triggering relationships, addressing each source of differences in turn. It is now useful to summarize by addressing each of the three overall triggering relationships in turn.


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