The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Ernesto Motta - One of the best experts on this subject based on the ideXlab platform.
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Bearing Capacity of strip footings near slopes
Geotechnical and Geological Engineering, 2010Co-Authors: Francesco Castelli, Ernesto MottaAbstract:In the last decades a great attention was given by many authors to the evaluation of the static and seismic Bearing Capacity of footings near slopes. In this paper a model has been developed based on the limit equilibrium method, considering a circular surface propagates towards the slope until the sloping ground is reached. The Bearing Capacity is investigated considering either the distance of the footing from the edge of the slope and/or the effect of the footing embedment. A validation of the proposed model was made by a comparison with solutions taken from literature regarding the evaluation of the Bearing Capacity for a footing adjacent to a slope and for an inclined load. The loading conditions consist in vertical and horizontal stress on the footing and on the soil below the footing. Both the inertial and kinematic effects of the seismic loading have been analyzed, and a simple equation has been derived for the evaluation of the seismic Bearing Capacity. The static and seismic Bearing Capacity has been investigated as a function of the soil friction angle, of the seismic coefficient, of the sloping ground. Finally, the influence of the distance of the footing from the edge of the slope was taken into consideration in the evaluation of the Bearing Capacity, and a threshold distance at which the reduction of the Bearing Capacity due to the sloping ground vanishes has been defined.
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Bearing Capacity of strip footings near slopes
Geotechnical and Geological Engineering, 2010Co-Authors: Francesco Castelli, Ernesto MottaAbstract:In the last decades a great attention was given by many authors to the evaluation of the static and seismic Bearing Capacity of footings near slopes. In this paper a model has been developed based on the limit equilibrium method, considering a circular surface propagates towards the slope until the sloping ground is reached. The Bearing Capacity is investigated considering either the distance of the footing from the edge of the slope and/or the effect of the footing embedment. A validation of the proposed model was made by a comparison with solutions taken from literature regarding the evaluation of the Bearing Capacity for a footing adjacent to a slope and for an inclined load. The loading conditions consist in vertical and horizontal stress on the footing and on the soil below the footing. Both the inertial and kinematic effects of the seismic loading have been analyzed, and a simple equation has been derived for the evaluation of the seismic Bearing Capacity. The static and seismic Bearing Capacity has been investigated as a function of the soil friction angle, of the seismic coefficient, of the sloping ground. Finally, the influence of the distance of the footing from the edge of the slope was taken into consideration in the evaluation of the Bearing Capacity, and a threshold distance at which the reduction of the Bearing Capacity due to the sloping ground vanishes has been defined. Springer Science+Business Media B.V. 2009.
Francesco Castelli - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of the Bearing Capacity of footings on slopes
International Journal of Physical Modelling in Geotechnics, 2012Co-Authors: Francesco Castelli, Valentina LentiniAbstract:In the last few decades, a great amount of interest has developed in the evaluation of the influence of Bearing Capacity of shallow foundations on slopes. When a footing is placed near a slope the Bearing Capacity may be reduced. In fact, the failure mechanism is influenced by the distance of the foundation from the edge of the sloping ground. In order to investigate the effect of the Bearing Capacity of shallow foundations on slopes, model footing tests were performed. This paper presents the results of the investigation, to establish both qualitative and quantitative relationships between the ultimate load of the soil–foundation system and the location of the footing with respect to the slope. Values of ultimate loads deduced from experimental tests are compared with values derived by a numerical analysis based on the limit equilibrium method. Modified Bearing Capacity factors which take into account the effect of the sloping ground are proposed.
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Bearing Capacity of strip footings near slopes
Geotechnical and Geological Engineering, 2010Co-Authors: Francesco Castelli, Ernesto MottaAbstract:In the last decades a great attention was given by many authors to the evaluation of the static and seismic Bearing Capacity of footings near slopes. In this paper a model has been developed based on the limit equilibrium method, considering a circular surface propagates towards the slope until the sloping ground is reached. The Bearing Capacity is investigated considering either the distance of the footing from the edge of the slope and/or the effect of the footing embedment. A validation of the proposed model was made by a comparison with solutions taken from literature regarding the evaluation of the Bearing Capacity for a footing adjacent to a slope and for an inclined load. The loading conditions consist in vertical and horizontal stress on the footing and on the soil below the footing. Both the inertial and kinematic effects of the seismic loading have been analyzed, and a simple equation has been derived for the evaluation of the seismic Bearing Capacity. The static and seismic Bearing Capacity has been investigated as a function of the soil friction angle, of the seismic coefficient, of the sloping ground. Finally, the influence of the distance of the footing from the edge of the slope was taken into consideration in the evaluation of the Bearing Capacity, and a threshold distance at which the reduction of the Bearing Capacity due to the sloping ground vanishes has been defined.
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Bearing Capacity of strip footings near slopes
Geotechnical and Geological Engineering, 2010Co-Authors: Francesco Castelli, Ernesto MottaAbstract:In the last decades a great attention was given by many authors to the evaluation of the static and seismic Bearing Capacity of footings near slopes. In this paper a model has been developed based on the limit equilibrium method, considering a circular surface propagates towards the slope until the sloping ground is reached. The Bearing Capacity is investigated considering either the distance of the footing from the edge of the slope and/or the effect of the footing embedment. A validation of the proposed model was made by a comparison with solutions taken from literature regarding the evaluation of the Bearing Capacity for a footing adjacent to a slope and for an inclined load. The loading conditions consist in vertical and horizontal stress on the footing and on the soil below the footing. Both the inertial and kinematic effects of the seismic loading have been analyzed, and a simple equation has been derived for the evaluation of the seismic Bearing Capacity. The static and seismic Bearing Capacity has been investigated as a function of the soil friction angle, of the seismic coefficient, of the sloping ground. Finally, the influence of the distance of the footing from the edge of the slope was taken into consideration in the evaluation of the Bearing Capacity, and a threshold distance at which the reduction of the Bearing Capacity due to the sloping ground vanishes has been defined. Springer Science+Business Media B.V. 2009.
Ruwan Rajapakse - One of the best experts on this subject based on the ideXlab platform.
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Bearing Capacity Computation
Geotechnical Engineering Calculations and Rules of Thumb, 2020Co-Authors: Ruwan RajapakseAbstract:This chapter discusses the Bearing Capacity equations developed by Terzaghi, which are used in order to compute the Bearing Capacity of foundations. It explains the three properties of soil that develop its Bearing Capacity. It describes the terms used in the Terzaghi Bearing Capacity equation, the ultimate Bearing Capacity, the cohesion term, the surcharge term, and the density term. Each term in the Terzaghi Bearing Capacity equation impacts the Bearing Capacity of a footing. It concerns the computation of Bearing Capacity in sandy soil and explores a wall footing in a homogeneous sand layer and a column footing in a homogeneous clay layer. The Bearing Capacity and column footing in soil layered with clay and sand is described. Furthermore, it explores a column footing on layered soil with two sand layers. It also covers a wall footing in soil with two different layers of clay and considers a strip footing design in sand using SPT (N) values, for the no groundwater case. It then discusses the Bearing Capacity when groundwater is present and when groundwater is above and below the bottom of footing level. Finally, it discusses shallow foundations in bridge abutments.
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Bearing Capacity – rules of thumb
Geotechnical Engineering Calculations and Rules of Thumb, 2020Co-Authors: Ruwan RajapakseAbstract:Bearing Capacity rules of thumb using SPT values provided. Drained analysis and undrained analysis conducted in this chapter. Also Bearing Capacity for different soils are discussed.
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Bearing Capacity: Rules of Thumb
Geotechnical Engineering Calculations and Rules of Thumb, 2016Co-Authors: Ruwan RajapakseAbstract:Bearing Capacity rules of thumb using SPT values provided. Drained analysis and undrained analysis conducted in this chapter. Also Bearing Capacity for different soils are discussed.
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4 – Bearing Capacity: Rules of Thumb
Geotechnical Engineering Calculations and Rules of Thumb, 2008Co-Authors: Ruwan RajapakseAbstract:Publisher Summary This chapter provides valuable insights into the Bearing Capacity of the foundations and discusses about the Rules of thumb while calculating the Bearing Capacity. Bearing Capacity equations developed by Terzaghi, Hansen, Meyerhoff, and Vesic are used widely to calculate the Bearing Capacity of the foundations. However, there are rule of thumb methods that have been used for many years by engineers. The chapter further discusses the Bearing Capacity in medium to coarse sands to very fine sands. Using the average SPT (N) value, the Bearing Capacity in coarse to medium sands can be obtained. The Bearing Capacity of coarse to medium sands (allowable) is 0.2 Naverage (ksf) (not to exceed 12 ksf). Same equation can be used to calculate Bearing Capacity of fine sands, but restricted to a lower maximum value.
M F Bransby - One of the best experts on this subject based on the ideXlab platform.
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the undrained vertical Bearing Capacity of skirted foundations
Soils and Foundations, 2007Co-Authors: M F BransbyAbstract:Skirted foundations are becoming an increasingly prevalent offshore foundation solution for the oil and gas and renewable energies industries. Their Capacity under combined horizontal, vertical and moment loading must be found in order to ensure their stability under environmental loadings. As part of this process, knowledge of the vertical Bearing Capacity is required. In this paper, the vertical Bearing Capacity of skirted foundations on normally consolidated undrained soil was investigated using numerical and physical modelling. Finite element analyses were carried to investigate the vertical Bearing Capacity of foundations with different geometries for various embedment ratios. Accompanying upper bound plasticity analyses highlighted the mechanistic reasons for the varying response and allowed examination of the effect of changing skirt interface friction. Analyses showed that skirted foundation Capacity under vertical load may be considered normally as if the foundation is rigid with an embedment depth equal to the skirt depth. Based on the numerical analysis, a design method is proposed to calculate vertical Bearing Capacity. Finally, good agreement with results from a series of centrifuge model tests partially validated the design method.
Abdoreza Fazeli - One of the best experts on this subject based on the ideXlab platform.
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Seismic Bearing Capacity of Strip Foundations on Fiber-Reinforced Granular Soil
Geotechnical and Geological Engineering, 2020Co-Authors: Amin Keshavarz, Mehdi Nemati, Abdoreza FazeliAbstract:The present study investigated the Bearing Capacity of strip footings on a bed of granular fiber-reinforced soils. Analyses were performed by the stress characteristics method (SCM). The failure criterion considers anisotropic distribution of fiber orientation and ignores the rupture of reinforcements. Seismic effects were included in the stress equilibrium equations as the horizontal and vertical pseudo-static coefficients. Stress equilibrium equations were solved by the finite difference method. A computer code was provided to solve the problem. Using the soil and reinforcement input parameters, the code determines the characteristics network and calculates the Bearing Capacity. The Bearing Capacity was expressed as the Bearing Capacity factors of the soil unit weight and surcharge. Parametric analysis was performed to investigate the effect of soil and reinforcement parameters on the Bearing Capacity and the shape of the failure zone. The outcomes indicated that the SCM results lower ultimate Bearing Capacity as compared with the upper bound method. Also, the depth of the failure zone increases with an increase in the amount of reinforcement or decrease in the horizontal seismic coefficient. Considering the anisotropic distribution of fiber orientations leads to more Bearing Capacity than the isotropic distribution.