Soil–pile–cap static interaction analysis by finite and infinite elements

1991 ◽  
Vol 28 (6) ◽  
pp. 771-783 ◽  
Author(s):  
Weiming Liu ◽  
Milos Novak
Keyword(s):  
Interaction Analysis ◽  
Near Field ◽  
Direct Analysis ◽  
Field Soil ◽  
Weak Zone ◽  
Soil Medium ◽  
Infinite Elements ◽  
Static Interaction ◽  
Pile Cap ◽  
Single Piles

A direct analysis of pile–soil static interaction by the combination of finite and infinite elements is presented. The pile and the near-field soil medium are modelled by finite elements, whereas the far-field soil medium is modelled by mapped infinite elements. Axially loaded single piles and single piles with caps subject to monotonic loading are investigated. The soil is assumed to be either elastic or elastic–perfect plastic. A weak zone is introduced around the pile to approximately account for slip between the soil and the pile. Numerical results show that this approach is quite efficient and versatile for various soil–structure interaction problems. Key words: pile, soil, cap, elastoplasticity, finite element, infinite element.

An experimental investigation into pile group-layered soil interaction

1996 ◽  
Vol 31 (5) ◽  
pp. 371-375
Author(s):  
K Chandrashekhara ◽  
S Joseph Antony ◽  
J Mallikarjuna Reddy
Keyword(s):  
Numerical Solutions ◽  
Interaction Analysis ◽  
Pile Group ◽  
Layered Soil ◽  
Single Pile ◽  
Photoelastic Method ◽  
Soil Medium ◽  
Interaction Factor ◽  
Pile Cap ◽  
Soil Interface

An interaction analysis of an axially loaded single pile and pile group with and without a pile cap in a layered soil medium has been investigated using the two-dimensional photoelastic method. A study of the pile or pile group behaviour has been made, varying the pile cap thickness as well as the embedded length of the pile in the hard stratum. The shear stress distribution along the pile-soil interface, non-dimensionalized settlement values of the single pile and the interaction factor for the pile group have been presented. Wherever possible, the results of the present analysis have been compared with available numerical solutions.

Development of Graphical Method of Pile Group Foundation Design

2016 ◽  
Vol 845 ◽  
pp. 94-99
Author(s):  
Noegroho Djarwanti ◽  
Raden Harya Dananjaya ◽  
Fauziah Prasetyaningrum
Keyword(s):  
Los Angeles ◽  
Construction Projects ◽  
Graphical Method ◽  
Pile Group ◽  
Foundation Design ◽  
Fast Estimation ◽  
Pile Cap ◽  
Single Piles ◽  
Simplified Analysis

In the construction projects, a pile group foundation is often utilized. The group of bored piles is usually installed relatively close to each other and joined at the top by a pile cap to hold up the loads. In other hand, a fast estimation of the groups of piles capacities are needed in the preliminary design and in other conditions of projects, such as a supervisor of projects want to estimate the capacities of the group of piles. The purpose of this research is to study the correlations of groups of piles efficiencies with the number of piles and to compare the groups of piles capacities with the single piles capacities. Furthermore, this study is aimed to make a fast estimation of groups of piles capacities using proposed graphical method.The piles efficiencies are calculated using several methods, such as Simplified Analysis, Converse-Labare [1][2], Los Angeles Group, Seiler - Keeney, Das, and Sayed - Baker. In order to calculate the groups of piles capacities, the capacities of single piles are needed. The singles piles capacities are taken from graphical method proposed by Djarwanti et al. (2015a and 2015b). Three graphical methods utilized are derived from the Briaud et al. (1985) , Reese and Wright (1977), and Reese O’Neill method. Moreover, the proposed graphical method is applied in the case study. The case study takes palace in Graha Indoland Condotel Inside Yogyakarta Construction Project.The pile efficiency graph is recommended for this research since the value of pile efficiency could be easily taken. The value of pile efficiency for Graha Indoland Condotel Inside using Simplified Analysis, Converse - Labare, Los Angeles Group, Seiler – Keeney, Das, and Sayed – Baker are 1,75; 0,89; 0,94; 0,99; 4,00; 1,56 respectively. Meanwhile the value of pile group capacity with the value of pile group efficiency more than 1, showed that the pile group capacity based on the efficiency is bigger than the one based on single down pattern.

Analysis of Structural and Non-Structural Problems by Coupling of Finite and Infinite Elements

2014 ◽  
Vol 578-579 ◽  
pp. 445-455
Author(s):  
Mustapha Demidem ◽  
Remdane Boutemeur ◽  
Abderrahim Bali ◽  
El-Hadi Benyoussef
Keyword(s):  
Numerical Technique ◽  
Near Field ◽  
Main Idea ◽  
Far Field ◽  
Mining Operations ◽  
Infinite Element ◽  
Infinite Elements ◽  
Structural Problems ◽  
Infinite Element Method ◽  
Element Method

The main idea of this paper is to present a smart numerical technique to solve structural and non-structural problems in which the domain of interest extends to large distance in one or more directions. The concerned typical problems may be the underground excavation (tunneling or mining operations) and some heat transfer problems (energy flow rate for construction panels). The proposed numerical technique is based on the coupling between the finite element method (M.E.F.) and the infinite element method (I.E.M.) in an attractive manner taking into consideration the advantages that both methods offer with respect to the near field and the far field (good accuracy and sensible reduction of equations to be solved). In this work, it should be noticed that the using of this numerical coupling technique, based on the infinite element ascent formulation, has introduced a more realistic and economic way to solve unbounded problems for which modeling and efficiency have been elegantly improved. The types of the iso-parametric finite elements used are respectively the eight-nodes (Q8) and the four-nodes (Q4) for the near field. However, for the far field the iso-parametric infinite elements used are the eight-nodes (Q8I) and the six-nodes (Q6I).

Sign in / Sign up

Export Citation Format

Share Document