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گواهی نمایه سازی مقاله Foundation size effect on modulus of sub grade reaction on Sandy soils

عنوان مقاله: Foundation size effect on modulus of sub grade reaction on Sandy soils
شناسه (COI) مقاله: NCCE06_0571
منتشر شده در ششمین کنگره ملی مهندسی عمران در سال ۱۳۹۰
مشخصات نویسندگان مقاله:

M .Janbaz - Department of Civil Engineering, International University of Imam Khomeini, Qazvin, Iran
S Janbaz - Department of Civil Engineering, Tabriz University, Tabriz, Iran

خلاصه مقاله:
Winkler model is one of the most popular models in determining the modulus of sub grade reaction. In this model, the sub grade soil is assumed to behave like infinite number of linear elastic springs. The stiffness of these springs is named as the modulus of sub grade reaction. This modulus is dependant to some parameters like soil type, size, shape, depth and type of foundation. The direct method for estimating the modulus of sub grade reaction is plate load test that is done with 30-100 cm diameter circular plate or equivalent rectangular plate. Afterward, we have to extrapolate the test value for exact foundation. In the practical design procedure, Terzaghi's equation is usually used to determine the modulus of sub grade reaction for exact foundation, but there are some uncertainties in utilizing such equation. In this paper the size effect of foundation on sandy sub grade with use of finite element software (Plaxis 8.2) is proposed to investigate the validation of Terzaghi's formula on determination ofsub grade reaction modulus. Also the comparison between Vesic's equation, Terzaghi's one and obtained results are presented

کلمات کلیدی:
Sub grade reaction modulus, Terzaghi's equation, Mat foundation, Plate load test

صفحه اختصاصی مقاله و دریافت فایل کامل: https://www.civilica.com/Paper-NCCE06-NCCE06_0571.html