دراسة تحليلية لإنشاء مغلفات الانهيار للأساسات الإزارية الشريطية على تربة غير مصرفة

الملخص EN

Skirted foundation consists of a surface horizontal base reinforced by thin vertical plates or "skirts" below it.

the use of these foundations has spread, especially in offshore oil and gas installations and for wind turbines foundations.

these foundations are subject to combined vertical -horizontal -moment loads, therefore they must be studied under different types of loads in order to ensure their stability.

this research aims, and through a series of finite element analyses, to study the combined bearing capacity of strip skirted foundations for uniform strength clay for different embedment ratio by adopting failure envelopes method, and to compare the results with previous research.

the uniaxial ultimate vertical load was calculated for different embedment ratio.

the failure envelope was built in space by creating slices of failure envelopes within the three-dimensional failure envelope at specified levels of uniaxial ultimate vertical load and for different embedment ratio.

the results showed the role of the skirt in increasing the uniaxial and combined bearing capacity, and that the shape of the failure envelope is significantly associated with foundation embedment ratio as the obliqueness and the asymmetry of the failure envelope increases with the increase in the embedment ratio.

the size of the failure envelopes is affected by the embedment ratio and the level of vertical load, where the combined capacity diminishes with a decrease in the embedment ratio and an increase in the level of vertical load.