Modelling and Assessment of a Single Pile Subjected to Lateral Load (original) (raw)
Related papers
Single Pile Simulation and Analysis Subjected to Lateral Load
2000
The results of the 3D finite element analysis on the behavior of single pile under lateral loadings are presented in this paper. The effect of pile shape for both circular and square cross-section on pile response was investigated. In addition, an effect of slenderness ratio L/B is also be carried out in this analysis. Linear elastic model of pile was
Japanese Geotechnical Society Special Publication, 2016
In the present study an analytical procedure is developed, based on finite element approach, to determine the bending moment and lateral deflection response of a free headed single pile with floating tip embedded in both dry and saturated cohesionless soils subjected to combined action of vertical and lateral loadings, using the modulus of subgrade reaction method. Also the numerical results using MIDAS GTS are obtained to validate the proposed analytical solution. It is observed under static conditions, when the vertical load is increased from zero to the 'ultimate' pile capacity at 0.03D deflection level (where D is the diameter of the pile), the lateral load carrying capacity of the fixed headed and free headed flexible piles is increased by 43.27% and 26%, respectively embedded in dry dense sand. Similarly for fixed headed piles embedded in dry and saturated loose sand, the bending moment is increased by 25% and 27%, respectively when vertical loads varies from zero to ultimate pile capacity for a constant lateral load of 200kN.Thus the above analysis is useful for practical design purpose to estimate the lateral load carrying capacity of a single pile by knowing the allowable deformation and vertical load acting on the pile.
Lateral Pile Response Subjected to Different Combination of Loadings
Journal of Engineering Science and Technology Review
Pile-soil interaction has been a subject of interest to many earlier researchers. However, not much work has been done on the effects of structural response of single piles subjected to different combination of axial and lateral loads and hence the respective pile-soil interaction. The main objectives of this paper are to assess the influence of axial load intensities on the lateral single isolated pile response in various pile slenderness ratios. Three-dimensional finite element approach was used to simulate the whole geotechnical system. The finite element included linear elastic model to represent the pile, Mohr-Coulomb to model surrounded soil and 16-nodes interface element to simulate the pile-soil interface. It was found that the lateral deflection is increased with increased the axial load in case of cohesionless soils. While, in case of cohesive soil, reduction in lateral pile displacement is occurred when low axial load is applied (i.e. V less than 4H) and increased when axial load level (i.e. V more than 6H) has been increased.
Single Pile Simulation and Analysis (2)
The results of the 3D finite element analysis on the behavior of single pile under lateral loadings are presented in this paper. The effect of pile shape for both circular and square cross-section on pile response was investigated. In addition, an effect of slenderness ratio L/B is also be carried out in this analysis. Linear elastic model of pile was used for modelling the piles. Mohr-Coulomb model was used to simulate the surrounded soil. The pilesoil interaction composed of 16-node interface elements. A good correlation between the experiments and the analysis was observed in validation example. It was found that the pile response is affected by the amount of loading, the pile crosssectional shape and pile slenderness ratio. The lateral resisting of pile increase in proportioned to the square shape of the pile. In both pile shape, a short pile (L/B = 8.3) gave a small amount of lateral tip deflection than the long piles with a slenderness ratio more than 8.3 for the same amount of loading. Also, the negative base deflection is high for short pile and reduces to zero for long piles.
Lateral Behavior of Single Pile in Cohesionless Soil Subjected to
A numerical investigation based on 3D finite element analysis of the behavior of single pile under pure lateral and combined loadings is presented in this paper with different water table elevations. The linear elastic model is used for modeling of the pile material while the Mohr-Coulomb model is used to simulate the surrounding soil. The pile -soil interaction composed of 16-node interface elements. Assessments are made on the lateral soil pressures with respect to pile width and depth. The results have shown that the lateral pile response influenced by the water table elevation is to significantly increase the capacity in dry soil condition and marginally decrease the capacity in fully saturated soil. It was found that the axial load intensity affects on the lateral pile response; the great lateral pile displacement occurred at vertical load increment 12 and 16 which means that the lateral response is sensitive under the influence of large amount of vertical load.
2014
Pile foundation is subjected to vertical load as well as lateral load. The design procedures assumed that the pile are subjected to pure vertical or lateral load and does not take in to the effect of combined vertical and lateral loads. Therefore, the study of pile under combined load is important to assess the overall response of pile under loads. The effect of vertical load intensity on the laterally laded pile response is undertaken in this paper using the three-dimensional finite element simulation. Linear elastic model of pile is used for modeling the piles. Mohr-Coulomb model is used to simulate the surrounded soil. The pilesoil interaction composed of 16-node interface elements. The vertical load is reacting on the lateral response when compared with pile under pure lateral load. Opposite sign in lateral soil pressure is created in the lower part of pile when the intensity of lateral loads is increased.
BEHAVIOR OF LATERALLY LOADED PILES IN COHESIVE SOILS
Pile foundations are often required to resist lateral loading. Lateral loads come from a variety of sources including wind, earthquakes, waves, and ship impacts. So, it is important to know the lateral load resistance capacity of pile foundation. This requires estimation of ultimate loads based on which safe working loads will be assessed and also estimation of pile deflections to ensure that serviceability aspects are accounted in the design Several methods are available for predicting the ultimate lateral resistance to piles in clay soil. However, these methods often produce significantly different ultimate resistance values. This makes it difficult for practicing engineers to effectively select the appropriate method when designing laterally loaded piles in clay soil. In this paper, lateral load behavior of single piles in clay soil was studied, for different L/D ratio by changing the diameter and length of pile. The analysis was carried out by considering free head pile. The influence of soil type, effect of pile length and pile diameter on the pile response was observed and the results obtained by IS2911Part1 (sec2) were compared with the Broms method. Also deflection and lateral load were calculated for a typical pile for various L/D ratio and their results were presented
Effect of Shape and Slenderness Ratio on the Behavior of Laterally Loaded Piles
nahrain-eng.org
In case of piles subjected to lateral loading, the failure mechanisms of short pile under lateral loads are different from that of long pile case. The lateral load capacity of pile is limited in lateral deformation of the pile that effected directly on the contact surface area. The results of the 3D finite element analysis for the problem of a single pile under lateral loadings are presented in this paper. The effect of pile shape for both circular and square crosssection on pile response was investigated. Also the influence of slenderness ratio L/B on the pile deformation was discussed in this study. Linear elastic model was used for modeling the piles. Mohr-Coulomb model was used to simulate the surrounded soil. The pile soil interaction composed of 16-node interface elements. A good correlation between the experiments and the analysis was observed in validation example. It was found that the pile response is affected by the amount of loading, the pile cross sectional shape and pile slenderness ratio. The lateral resisting of pile increase in proportioned to the square shape of the pile. In both pile shape, a short pile (L/B = 8.3) gave a small amount of lateral tip deflection than the long pile with a slenderness ratio more than 8.3 for the same amount of loading. Also, the negative base deflection is high for short pile and reduces to zero for long pile.
2015
Flexible piles subjected to a lateral load deform prominently near the ground surface and the pile deformation decreases with increasing depth. This significant deformation is called the active pile length, La. During a nonlinear event, a soil wedge is pushed up in the passive region along this active pile length. To investigate if the active pile length can describe the ultimate side soil reaction, a numerical simulation of single pile embedded in homogeneous cohesive soil is done using the 3D OpenSeesPL. The elasto-plastic behavior of the soil is modeled using the Von Mises multi surface kinematic plasticity model while the pile is modeled using elastic beam-column elements. From the results of the rigorous solution, a simplified method to define the ultimate lateral resistance of single piles in cohesive soils using the key parameter, La, is presented. This method provides more practical approach in the seismic design and assessment of piles. Introduction Piles are usually used a...