Dynamic Properties of Fine Grained Soils in South of Tehran
- سال انتشار: 1381
- محل انتشار: فصلنامه زلزله شناسی و مهندسی زلزله، دوره: 4، شماره: 1
- کد COI اختصاصی: JR_JSEE-4-1_002
- زبان مقاله: انگلیسی
- تعداد مشاهده: 222
نویسندگان
IIEES
IIEES
Ph.D. Candidate of Civil Engineering, Islamic Azad University (IAU), Science and Research Branch
چکیده
Shear modulus, damping ratio and shear wave velocity profiles are important input parameters in site response analysis. For seismic microzonation in south of Tehran, many field and laboratory studies were performed. Field investigations include seismic refraction, down-hole, SASW and SPT while laboratory tests encompass stress controlled cyclic triaxial and resonant column tests on undisturbed samples of low to medium plastic silty materials. This paper presents dynamic properties of fine grained soils in south of Tehran through field and laboratory studies. Based on field geoseismic investigations, new Vs -N(SPT) correlations for fine grained soils are presented. Also laboratory test results reveal that effective confining pressure at stage of consolidation has a remarkable effect on both strain dependent shear modulus and damping ratio of very low plastic soils but by increasing soil plasticity this effect disappears. Evaluation of plasticity effects on deformation properties shows that for PI< ۱۲, plasticity index does not have any outstanding effect on these properties, while by increasing PI, shear modulus ratio will increase and damping ratio will decrease.کلیدواژه ها
Fine Grained Soils, Shear wave velocity, Shear modulus, Damping Ratio, confining pressureاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.