Numerical analysis of soil liquefaction induced failure of earth dams
عنوان مقاله: Numerical analysis of soil liquefaction induced failure of earth dams
شناسه ملی مقاله: LTBD04_111
منتشر شده در چهارمین کنفرانس بینالمللی رفتار بلندمدت و فنآوریهای نوسازی سازگار با محیط زیست سدها در سال 1396
شناسه ملی مقاله: LTBD04_111
منتشر شده در چهارمین کنفرانس بینالمللی رفتار بلندمدت و فنآوریهای نوسازی سازگار با محیط زیست سدها در سال 1396
مشخصات نویسندگان مقاله:
Babak Ebrahimian - Faculty of Civil, Water and Environmental Engineering, Abbaspour School of Engineering, Shahid Beheshti University (SBU), Tehran, Iran - The Highest Prestigious Scientific and Professional National Foundation, Iran s National Elites Foundation (INEF), Teh
Ali Noorzad - Faculty of Civil, Water and Environmental Engineering, Abbaspour School of Engineering, Shahid Beheshti University (SBU), Tehran, Iran
خلاصه مقاله:
Babak Ebrahimian - Faculty of Civil, Water and Environmental Engineering, Abbaspour School of Engineering, Shahid Beheshti University (SBU), Tehran, Iran - The Highest Prestigious Scientific and Professional National Foundation, Iran s National Elites Foundation (INEF), Teh
Ali Noorzad - Faculty of Civil, Water and Environmental Engineering, Abbaspour School of Engineering, Shahid Beheshti University (SBU), Tehran, Iran
This study presents numerical modeling of the dynamic behavior of an earth dam rested on a liquefiable foundation. Numerical simulations are carried out using effective stress-based, fully coupled nonlineardynamic analysis approach. The Finn-Byme model with extended Masing rules is employed to model pore pressure generation in the liquefied soils. In this regard, Masing rules are implemented into the constitutive relations to precisely explain the nonlinear response of soil under general cyclic loading. As a result, the soil shear stifmess and hysteretic damping can change with loading history. Pore pressure is accumulated as a function of the cyclic shear strain amplitude. The procedure of calibrating the constructed numerical model with well-documented centrifuge test data is addressed. Acceptable agreements are shown between the results obtained Hom the current investigation and those of experimental observations available in the literature. Afterwards, the dynamic response of an earth dam founded on a liquefiable sandy soil foundation is evaluated and discussed. Special emphasis is given to the computed excess pore water pressures, deformations and accelerations dining dynamic loading. It is shown that the numerical model can predict the essential aspects of liquefaction phenomenon occurred in the earth dam-foundation system during dynamic loading.
کلمات کلیدی: Numerical simulation, nonlinear dynamic response, liquefaction, earth dam
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/680229/