Bearing capacity of footing on layered soils

Dissertant

Sadiq, Umar Sharif

University

University of Technology

Faculty

-

Department

Department of Building and Construction Engineering

University Country

Iraq

Degree

Master

Degree Date

2004

English Abstract

Geotechnical engineers are familiar with the uncertainties and inaccuracies in analytical methods.

The use of probability theories to assess risk and reliability of designs represents a rational approach and recent contributions have added to the theoretical basis of reliability assessment.

Statistical^ methods can be of great value to the designer since it is possible to express many of the decision uncertainties in term of numerical probabilities.

In this study the probabilistic approach that deals with ultimate bearing capacity for multilayer soil system is introduced with specific condition (continuous footing applied on submerged layered soils).

The uncertainty variables (random variables) that have been studied of three main types ; •Soil properties that include the soil strength parameters of the fiist layer (c1, ɸ1, Y1) and the soil strength parameters of the second layer (c2, ɸ2, Y2) Geometry probkm that includes thickness of the first layer below tooting (h1), width of footing (bw) and depth'of excavation (d).

Actual load (p).

Each random variable was defined by its mean (μ) and standard deviation (σ) and was assumed to have a normal distribution behavior The First Order Second Moment Method (F.O.S.M) was used in this thesis.

The approach is applied to numerical examples for different soils and it was shown that the probability of failure (Pf) is more reliable than traditional factor of safety (F.s) and hence (Pf) is recommended in this thesis to substitute (F.s) in the design of foundation on two layers soil system .

A parametric study is made and the effect of each design paiameter is investigated through four cases which represent most of site conditions.

In general it was found that the actual load is more important than all other parameters while the parameters (c, ɸ) comes in second degree of importance.

It was shown that each parameter defined through reliability index has different effect.

Main Subjects

Civil Engineering

Topics

American Psychological Association (APA)

Sadiq, Umar Sharif. (2004). Bearing capacity of footing on layered soils. (Master's theses Theses and Dissertations Master). University of Technology, Iraq
https://search.emarefa.net/detail/BIM-305761

Modern Language Association (MLA)

Sadiq, Umar Sharif. Bearing capacity of footing on layered soils. (Master's theses Theses and Dissertations Master). University of Technology. (2004).
https://search.emarefa.net/detail/BIM-305761

American Medical Association (AMA)

Sadiq, Umar Sharif. (2004). Bearing capacity of footing on layered soils. (Master's theses Theses and Dissertations Master). University of Technology, Iraq
https://search.emarefa.net/detail/BIM-305761

Language

English

Data Type

Arab Theses

Record ID

BIM-305761