Influence of vertical loads on lateral response of pile foundations in sands and clays

Hazzar, Lassaad; Hussien, Mahmoud N.; Karray, Mourad

doi:10.1016/j.jrmge.2016.09.002

Cited by 67 publications

(20 citation statements)

References 23 publications

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“…These forces were measured and found to be minimal at the relatively small pile head rotations under consideration in this study; their effects are nonetheless likely to have had some influence during the post-cyclic tests when piles were subjected to rotations in excess of 5°. Numerical analyses reported by Karthigeyan et al (2006) and Hazzar et al (2017) indicated that the presence of axial pile forces has a minimal effect on the lateral sand response. The (hollow steel) model pile employed had the dimensions and properties summarised in Table 2.…”

Section: Dtu Beam Centrifuge Equipment and Setupmentioning

confidence: 91%

Empirical approach based on centrifuge testing for cyclic deformations of laterally loaded piles in sand

et al. 2019

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A systematic study into the response of monopiles to lateral cyclic loading in medium dense and dense sand was performed in beam and drum centrifuge tests. The centrifuge tests were carried out at different cyclic load and magnitude ratios, while the cyclic load sequence was also varied. The instrumentation on the piles provides fresh insights into the ongoing development of net stresses, bending moments and deflections as cycling progresses. Parallels between the test results and corresponding cyclic triaxial tests are drawn. The paper combines the results from this study with those from previous experimental investigations to provide empirical design recommendations for monopiles subjected to unidirectional cyclic loading.

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Section: Dtu Beam Centrifuge Equipment and Setupmentioning

confidence: 91%

Empirical approach based on centrifuge testing for cyclic deformations of laterally loaded piles in sand

et al. 2019

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“…The lowest value was chosen to examine the effects of soil thermal expansion on the thermal-mechanical behavior of the wall. For the friction angle, there are literatures which give 30-36°from loose sand to dense sand [36,38]，we chose 30°as it's density may not easy to compacted to the design stage of the lower depth. According to literature review [36], the dilation angle of dense sand and loose sand are from 0-12°and 0-10°, respectively.…”

Section: Numerical Modelmentioning

confidence: 99%

Thermo-mechanical behavior of energy diaphragm wall: Physical and numerical modelling

Dong

Tang

et al. 2019

Applied Thermal Engineering

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：The paper presents a study of the thermo-mechanical behavior of energy diaphragm wall. A physical model, which consists of a small-scale concrete diaphragm wall equipped with a heating exchange pipe, was used. A heating test was performed where hot water (at 50 °C) was circulated through a heat exchange pipe for 75 h. The results show that the temperatures in the wall and in the soil increased quickly during the first 20 h and reached stabilization at the end of the experiment. Heating induced increase of axial strain in the wall and earth pressure at the soil/wall interface. In addition to the experiment, a numerical model, using finite element analysis, was used to predict the behavior of the wall during this experiment. The good agreement between the numerical and the experimental results allows the main phenomena that took place to be explained; heating induces thermal expansion of the wall that results in the modification in stress in the wall and at the soil/wall interface. In addition, since the pipe was located closer to one side of the wall, the thermal expansion of the wall was not homogenous, and the wall bent during heating.

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“…An Associate in soil resolution supported an energy-based technique leading to a collection of governing equations and boundary conditions. The collection of governing equations and boundary conditions, which represent the deformation of the pile and soil below static lateral load, has been utilized by Hashem et al [9,[31][32][33][34] in homogeneous soil linear elastic, and Hashem et al [9,35] in multi-layered nonlinear and linear elastic soil. These equations were resolved numerically employing a finite distinction technique, whereas [9], used an equivalent technique to predict the deformation of a pile within inhomogeneous linear elastic soil below dynamic lateral loads.…”

Section: Basic Theory Of Reinforcement Concrete Pile On a Lateral Loadmentioning

confidence: 99%

Force Performance Analysis of Pile Behavior of the Lateral Load

Youssouf

Dembele

et al. 2019

Infrastructures

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This study was focused on the performance of the pile force at the lateral load of an arched bridge. The effect of the compression of arch bridges creates a large horizontal load. Therefore, it is one of the most important factors in the dimensioning of piles. The study aims to make a comparative study between the results obtained in the field, and those obtained by a 3D model defined as a Finite Element (FE) of a drilled pile, subjected to different lateral loads applied at exact time intervals. Moreover, the study was intended to determine the influence of the lateral load applied to a different pile diameter using the FE model. Thus, the unified FEA software Abaqus™ by Dassault systèmes®carried out various processing procedures, namely soil FE modeling, pile FE modeling, soil-pile interface, Mesh, and boundary conditions, to carry out an effective and predictive piles behavior analysis. Based on the Mohr-Coulomb criterion, the soil is considered to be stratified with elastoplastic behavior, whereas the Reinforcement Concrete Pile (RCP) was assumed to be linear isotropic elastic, integrating the concrete damage plasticity. Since the bridge is an arched bridge, the lateral load induced was applied to the head of the piles through a concentrated force to check the pile strength, for which the displacement, stress and strain were taken into account throughout, along the pile depth. The lateral displacement of the pile shows a deformation of the soil as a function of its depth, with different layers crossed with different lateral loads applied. Thus, from the study comparing the results of the FE measurements with the data measured in the field, added to the statistical analyses are as follows: Decrease of the displacement and stress according to the diameter, taking into account the different diameter. The foundations receive loads of the superstructure to be transmitted to the ground. Thus, the piles are generally used as a carrier transmitting loads on the ground. One of the important factors in the durability of the bridge depends more on the strength of these piles. This makes it necessary to study the reinforced concrete foundations because of their ability to resist loads of the structure, and the vertical and lateral loads applied to the structure. This implies an evaluation of the responses of the RCP according to the different lateral loads.

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Influence of vertical loads on lateral response of pile foundations in sands and clays

Cited by 67 publications

References 23 publications

Empirical approach based on centrifuge testing for cyclic deformations of laterally loaded piles in sand

Empirical approach based on centrifuge testing for cyclic deformations of laterally loaded piles in sand

Thermo-mechanical behavior of energy diaphragm wall: Physical and numerical modelling

Force Performance Analysis of Pile Behavior of the Lateral Load

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