Jasim M. Abbas

Modelling and Assessment of a Single Pile Subjected to Lateral Load

Abstract A three-dimensional finite element technique was used to analyse single pile lateral response subjected to pure lateral load. The main objective of this study is to assess the influence of the pile slenderness ratio on the lateral behaviour of single pile. The lateral single pile response in this assessment considered both lateral pile displacement and lateral soil resistance. As a result, modified p-y curves for lateral single pile response were improved when taking into account the influence lateral load magnitudes, pile cross sectional shape and flexural rigidity of the pile. The finite element method includes linear elastic, Mohr-Coulomb and 16-nodes interface models to represent the pile behaviour, soil performance and interface element, respectively. It can be concluded that the lateral pile deformation and lateral soil resistance because of the lateral load are always influenced by lateral load intensity and soil type as well as a pile slenderness ratio (L/D). The pile under an intermediate and large amount of loading (in case of cohesionless soil) has more resistance (low lateral displacement) than the pile embedded on the cohesion soil. In addition, it can be observed that the square-shaped pile is able to resist the load by about 30% more than the circular pile. On the other hand, pile in cohesionless soil was less affected by the change in EI compared with that in cohesive soil.

The Effect of Pile Cross Section on the Lateral behavior of Piles Under Combined Loading

In the present study, the effect of pile cross section on the lateral behavior of pile when subjected to combined loads has been investigated. The lateral tip displacement, as well as the deformation along the pile depth, has been taken into account. To achieve the objective that obtains from this work, the laboratory work was developed, which included piles made from aluminum and steel materials with circular and square cross-sections for each one. The diameter and the corresponding width of a square section of the used piles were 15 mm, with a slenderness ratio (L/D) of (25 and 45) and embedded in sandy soil with a relative density (Dr) of 70%. The test results revealed that the pile with square cross section was more resistance to lateral load compared with the traditional shape, with improvement in the range of (3065%) in different condition. Also, the presence of axial load effect on the lateral response of piles.