scholarly journals Geotechnical ULS design issues of bridge shallow foundations

2021 ◽  
Author(s):  
Konstantina Papadopoulou ◽  
George Gazetas
Keyword(s):  
Bearing Capacity ◽  
Point Of View ◽  
Shallow Foundations ◽  
Cohesionless Soils ◽  
Limit States ◽  
Geotechnical Design ◽  
Layered Clay ◽  
2D And 3D ◽  
Ultimate Limit ◽  
Special Case

Some important issues referring to the Ultimate Limit States of geotechnical design of bridge shallow foundations are discussed using results of 2D and 3D FE analyses, as follows: (a) The effects of highly eccentric and inclined loadings on the bearing capacity of footings on cohesionless soils, (b) the effects of soil inhomogeneity in the special case of 2-layered clay, (c) the scour effects in case of abutment and piers in riverbed, from the geotechnical point of view.

scholarly journals Comparative Analysis of Kazakhstani and European Approaches for the Design of Shallow Foundations

2020 ◽  
Vol 10 (8) ◽  
pp. 2920
Author(s):  
Assel Shaldykova ◽  
Sung-Woo Moon ◽  
Jong Kim ◽  
Deuckhang Lee ◽  
Taeseo Ku ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Summation Method ◽  
Shallow Foundations ◽  
Shallow Foundation ◽  
Design Procedures ◽  
Geological Conditions ◽  
Elastic Settlement ◽  
Geotechnical Design ◽  
The Difference ◽  
Design Calculations

The design of shallow foundations is performed in accordance with different building regulations depending on geotechnical and geological conditions. This paper involves the design calculations applying Kazakhstani and European approaches. The design of shallow foundations in Nur-Sultan city in Kazakhstan was implemented by the calculation of bearing capacity and elastic settlement in accordance with the design procedures provided in SP RK 5.01-102-2013: Foundations of buildings and structures, and Eurocode 7: Geotechnical design. The calculated results of bearing capacity and elastic settlement for two types of shallow foundations, such as pad foundation and strip foundation, adhering to Kazakhstani and European approaches are relatively comparable. However, the European approach provided higher values of bearing capacity and elastic settlement for the designed shallow foundation compared to the Kazakhstani approach. The difference in the results is explained by the application of different values of partial factors of safety for the determination of bearing capacity and different methods for the calculation of the elastic settlement of shallow foundations (i.e., elasticity theory and layer summation method).

Undrained capacity of circular shallow foundations on two-layer clays under combined VHMT loading

2022 ◽  
Author(s):  
Pengpeng He ◽  
Tim Newson
Keyword(s):  
Bearing Capacity ◽  
Effective Area ◽  
Undrained Shear Strength ◽  
Chemical Processes ◽  
Shallow Foundations ◽  
Interface Condition ◽  
Failure Envelope ◽  
Limit States ◽  
Element Analysis ◽  
Clay Deposits

Wind turbines are typically designed based on fatigue and serviceability limit states, but still require an accurate assessment of bearing capacity. Overconsolidated clay deposits in Canada often have a thin layer of crust with a relatively high undrained shear strength developed from weathering, desiccation, and geo-chemical processes. However, existing design methods only assess the bearing capacity using effective area and inclination factor without consideration of surficial crusts. This paper studies the undrained VHMT (vertical, horizontal, moment and torsional) failure envelope of circular foundations founded on a surficial crust underlain by a uniform soil with a zero-tension interface condition using finite element analysis. An analytical expression for the VHMT failure envelope is derived.

Verification of ultimate limit states in geotechnical design by Eurocode 7 in France and Germany

2007 ◽  
Vol 11 (5) ◽  
pp. 621-641 ◽  
Author(s):  
Roger Frank ◽  
Bernd Schuppener ◽  
Norbert Vogt ◽  
Anton Weissenbach
Keyword(s):  
Limit States ◽  
Eurocode 7 ◽  
Geotechnical Design ◽  
Ultimate Limit

Comparison of limits states design methods for bearing capacity of shallow foundations

1998 ◽  
Vol 35 (1) ◽  
pp. 175-182
Author(s):  
L D Baikie
Keyword(s):  
Bearing Capacity ◽  
Design Methods ◽  
Shallow Foundations ◽  
Limit States ◽  
The Difference

A comparison is made between several limit states design methods for the bearing capacity of shallow foundations. It is found that the main reason for the difference between the methods is the variation in the load factors.Key words: limit states design, shallow foundations, sand, clay.

scholarly journals Prediction of Ultimate Bearing Capacity of Shallow Foundations on Cohesionless Soils: A Gaussian Process Regression Approach

2021 ◽  
Vol 11 (21) ◽  
pp. 10317
Author(s):  
Mahmood Ahmad ◽  
Feezan Ahmad ◽  
Piotr Wróblewski ◽  
Ramez A. Al-Mansob ◽  
Piotr Olczak ◽  
...  
Keyword(s):  
Gaussian Process ◽  
Bearing Capacity ◽  
Gaussian Process Regression ◽  
Ultimate Bearing Capacity ◽  
Shallow Foundations ◽  
Cohesionless Soil ◽  
Unit Weight ◽  
Cohesionless Soils ◽  
Computing Technique ◽  
Theoretical Approaches

This study examines the potential of the soft computing technique—namely, Gaussian process regression (GPR), to predict the ultimate bearing capacity (UBC) of cohesionless soils beneath shallow foundations. The inputs of the model are width of footing (B), depth of footing (D), footing geometry (L/B), unit weight of sand (γ), and internal friction angle (ϕ). The results of the present model were compared with those obtained by two theoretical approaches reported in the literature. The statistical evaluation of results shows that the presently applied paradigm is better than the theoretical approaches and is competing well for the prediction of UBC (qu). This study shows that the developed GPR is a robust model for the qu prediction of shallow foundations on cohesionless soil. Sensitivity analysis was also carried out to determine the effect of each input parameter.

scholarly journals Application of the ultimate limit states factored strength approach to design of cantilever walls in dry cohesionless soils

HBRC Journal ◽  
2018 ◽  
Vol 14 (3) ◽  
pp. 415-421
Author(s):  
Mohamed F. Mansour ◽  
Muhammad D. Saad El-Din ◽  
Yasser M. El-Mossallamy ◽  
Hesham A. Mahdi
Keyword(s):  
Cohesionless Soils ◽  
Limit States ◽  
Ultimate Limit

Total and partial factors of safety in geotechnical engineering

1985 ◽  
Vol 22 (4) ◽  
pp. 477-482 ◽  
Author(s):  
L. D. Baikie
Keyword(s):  
Slope Stability ◽  
Factor Of Safety ◽  
Retaining Walls ◽  
Shallow Foundations ◽  
Deep Foundations ◽  
Foundation Engineering ◽  
Sheet Pile ◽  
Limit States ◽  
Partial Load ◽  
Geotechnical Design

The use of partial factors of safety in geotechnical design is introduced in the second edition of the Canadian Foundation Engineering Manual. The partial factors have been obtained from comparisons with conventional methods of analysis. Studies presented herein for simple slopes, cantilevered rigid retaining walls, flexible sheet pile walls, shallow strip foundations, and pile foundations indicate that modifications to some of the suggested partial load and resistance modification factors are necessary if comparable designs are to be obtained. Key words: factor of safety, partial factors, limit states design, slope stability, retaining walls, shallow foundations, deep foundations, bearing capacity.

Verification of ultimate limit states in geotechnical design by Eurocode 7 in France and Germany

2007 ◽  
Vol 11 (5) ◽  
pp. 621-642
Author(s):  
Roger Franck ◽  
Bernd Schuppener ◽  
Norbert Vogt ◽  
Anton Weissenbach
Keyword(s):  
Limit States ◽  
Eurocode 7 ◽  
Geotechnical Design ◽  
Ultimate Limit
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