Numerical Investigation of the Effect of Vertical Load on the Lateral Response of Piles

Karthigeyan, S.; Ramakrishna, V. V. G. S. T.; Rajagopal, K.

doi:10.1061/(asce)1090-0241(2007)133:5(512)

Cited by 160 publications

(70 citation statements)

References 22 publications

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“…In the final stage, the vertical load was held constant and the lateral load was applied under displacement control. This approach was adopted by previous researchers (Karthigeyan, 2008;Karthigeyan et al, 2007;Zadeh and Kalantari, 2011) to study SSP performance under combined vertical and lateral loading. Also, this approach is similar to pile loading offshore, as vertical loads from the offshore wind structure are applied first on installation of the turbine (normally under calm sea conditions so that H ≈ 0) followed by lateral loading under the action of wind and waves during operation of the wind turbine.…”

Section: 3mentioning

confidence: 99%

“…This is in contrast to the 1g model testing of SSPs driven into sand by Lee et al (2011) who found that the presence of vertical loads reduced the capacity by 31%, 14% and 7% in dense, medium dense and loose sand respectively. A review of more recent papers concerned with numerical modelling (Karthigeyan, 2008;Karthigeyan et al, 2007;Rajagopal and Karthigeyan, 2008;Zadeh and Kalantari, 2011) indicates that the presence of axial compression loads resulted in an increase in lateral capacity in sands and reduced lateral capacity in clay for wished-in-place piles. A limited number of model testing studies by Anagnostopoulos and Georgiadis (1993), Madhusudan Reddy and Ayothiraman (2015) and Mu et al (2015) again showed an increase in capacity for both driven and wished-in-place piles in sand but reduced capacity in clay.…”

Section: Introductionmentioning

confidence: 99%

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Effects of vertical loading on lateral screw pile performance

Al-Baghdadi

Brown

Knappett

et al. 2017

Proceedings of the Institution of Civil Engineers - Geotechnica

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The offshore wind energy sector faces new challenges as it moves into deeper water deployment. To meet these challenges, new and efficient foundation solutions are required. One potential solution is to upscale onshore screw piles but they require verification of performance for new geometries and demanding loading regimes. This paper presents a three-dimensional finite-element analysis investigation of screw pile behaviour when subjected to combined vertical and lateral loading in sand. In the investigation, the screw pile length and helical plate diameter were varied on piles with a fixed core diameter while subjecting the piles to combined axial and lateral loading. The results were compared with results from straight shafted piles with the same core diameter. The results of the analysis revealed that vertical compression loads increased the lateral capacity of the screw piles whereas vertical uplift loads marginally reduced the lateral capacity. The downside of this enhanced lateral capacity is that the screw piles experience higher bending moments. This suggests that, when using screw piles for offshore foundation applications, structures should be designed to maintain axial compressive loads on the piles and induced bending moments need to be adequately assessed when deciding on appropriate structural sections.

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Section: 3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of vertical loading on lateral screw pile performance

Al-Baghdadi

Brown

Knappett

et al. 2017

Proceedings of the Institution of Civil Engineers - Geotechnica

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“…In most practical situations, there is a need to assess the behavior of piles under simultaneous vertical and horizontal loadings because piles are commonly designed to carry either horizontal or vertical loads [1,2]. Nevertheless, in long buildings such as bridges abutments, offshore structure, transmission towers, etc., the piles carry not only axial load but also combination of axial (vertical) and lateral (horizontal) forces.…”

Section: Introductionmentioning

confidence: 99%

Lateral Pile Response Subjected to Different Combination of Loadings

Abbas

Chik

Taha³

2017

JESTR

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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.

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“…The methods to analyze the lateral capacity of anchor piles could be categorized into the limit state method (Broms, 1964), subgrade reaction method (Matlock and Reese, 1960), p-y method (Reese et al, 1974), elasticity method (Poulos, 1971) and plasticity method (Randolph and Houlsby, 1984). However, the pullout behavior of anchor piles under inclined loading is limited to empirical formulae (Yoshimi, 1964;Meyerhof, 1973), Finite Element (FE) analysis (Karthigeyan et al, 2007;Mroueh and Shahrour, 2007;Achmus and Thieken, 2010) and experimental investigations (Ramadan, 2011;Shin et al, 1993;Johnson, 2005;Sharma, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…When the mooring line is attached at the OLP, the pile has the maximum pullout capacity. The pullout capacity of the pile is directly determined by the failure mode, which is influenced by the loading angle of the mooring line, geometry and strength of the pile and local soil strength (Meyerhof, 1973;Karthigeyan et al, 2007). Clearly understanding the failure mode of the pile is essential to predict its pullout capacity.…”

Section: Introductionmentioning

confidence: 99%

Failure Mode and Pullout Capacity of Anchor Piles in Clay

Zhao¹,

Liu²,

Liu³

2017

American Journal of Engineering and Applied Sciences

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Anchor piles are wildly adopted in mooring systems. However, there are still challenges in predicting the failure mode and pullout capacity of the pile. Previous Finite Element (FE) analysis was all based on the traditional small strain FE analysis. The whole pullout process of the pile cannot be simulated. Hence, the failure mode of the pile is hard to be understood, especially under small loading angles to the horizontal. In addition, theoretical analysis received limited attention in analyzing the failure mode and pullout capacity of anchor piles under inclined loading. In the present work, both Large Deformation Finite Element (LDFE) and theoretical analyses are performed to investigate the failure mode and pullout capacity of anchor piles. The effectiveness of the LDFE analysis is at first verified by model test data. Then, a theoretical method is proposed to predict the Optimal Loading Point (OLP), failure mode and pullout capacity of the pile under inclined loading. Comparative study is also performed between LDFE and theoretical analyses. It is concluded: (1) the proposed theoretical method is effective in predicting the OLP, failure mode and pullout capacity of anchor piles; (2) the OLP is not affected by the length-to-diameter ratio and the failure direction of β>5°, while very sensitive to the soil strength and the loading angle; (3) there is a critical loading angle, below which the pile will be pulled out vertically; and (4) the lateral capacity at the OLP could be more than twice that at the top of the pile.

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Numerical Investigation of the Effect of Vertical Load on the Lateral Response of Piles

Cited by 160 publications

References 22 publications

Effects of vertical loading on lateral screw pile performance

Effects of vertical loading on lateral screw pile performance

Lateral Pile Response Subjected to Different Combination of Loadings

Failure Mode and Pullout Capacity of Anchor Piles in Clay

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