Nonlinear Response of Single Piles in Sand Subjected to Lateral Loads using khmax Approach

2006 ◽  
Vol 24 (1) ◽  
pp. 163-181 ◽  
Author(s):  
Sanjeev Kumar ◽  
Latika Lalvani ◽  
Maher Omar
Keyword(s):  
Nonlinear Response ◽  
Lateral Loads ◽  
Single Piles

NONLINEAR ANALYSIS OF A BARBELL-SHAPED CROSS SECTION WALL USING FIBER SLICE

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Dae-Han Jun ◽  
Pyeong-Doo Kang
Keyword(s):  
Reinforced Concrete ◽  
Analytical Model ◽  
Cross Section ◽  
Cross Sections ◽  
Axial Load ◽  
Nonlinear Response ◽  
Shear Walls ◽  
Lateral Loads ◽  
Fiber Element ◽  
Shaped Cross Section

Reinforced concrete shear walls are effective for resisting lateral loads imposed by wind or earthquakes. This study investigates the effectiveness of a wall fiber element in predicting the flexural nonlinear response of reinforced concrete shear walls. Model results are compared with experimental results for reinforced concrete shear walls with barbell-shaped cross sections without axial load. The analytical model is calibrated and the test measurements are processed to allow for a direct comparison of the predicted and measured flexural responses. Response results are compared at top displacements on the walls. Results obtained in the analytical model for barbell-shaped cross section wall compared favorably with experimentally responses for flexural capacity, stiffness, and deformability.

Elastoplastic solutions for single piles under combined vertical and lateral loads

2011 ◽  
Vol 18 (1) ◽  
pp. 216-222 ◽  
Author(s):  
Lei Zhang ◽  
Xiao-nan Gong ◽  
Zhong-xuan Yang ◽  
Jian-lin Yu
Keyword(s):  
Lateral Loads ◽  
Single Piles ◽  
Elastoplastic Solutions

scholarly journals A numerical technique for modeling the behavior of single piles in unsaturated soils

2021 ◽  
Vol 337 ◽  
pp. 03012
Author(s):  
Xinting Cheng ◽  
Sai K. Vanapalli
Keyword(s):  
Unsaturated Soils ◽  
Numerical Technique ◽  
Soil Mechanics ◽  
Nonlinear Behavior ◽  
Pile Foundations ◽  
Engineering Practice ◽  
Lateral Loads ◽  
Element Analysis ◽  
Promising Tool ◽  
Single Piles

Pile foundations are widely used in both saturated and unsaturated soils. In certain scenarios, these foundations are subjected to combined vertical and lateral loads. Conventionally, saturated soil mechanics principles are routinely used for the design of pile foundations in unsaturated soils. Such approaches contribute to unreliable estimates of the behavior of piles due to ignoring the influence of matric suction. In this paper, a comprehensive numerical technique is proposed for simulating the behavior of single piles subjected to combined vertical and lateral loads in unsaturated soils by taking account of the nonlinear behavior of shear strength and the elastic modulus of unsaturated soils. This is achieved through a subroutine that was developed for use in the ABAQUS software. The proposed numerical method provided reliable prediction of the vertical load-displacement behavior of a published model pile tested in saturated and unsaturated sands. In addition, 3D finite element analysis was extended to simulate the influence of variations in ground water table (GWT) on the vertical bearing capacity and the influence of vertical loads on lateral response of piles. The proposed numerical technique is a promising tool for implementing the state-of-the-art understanding of the mechanics of unsaturated soils into conventional engineering practice.

Flexibility coefficients and interaction factors for pile group analysis

1986 ◽  
Vol 23 (4) ◽  
pp. 441-450 ◽  
Author(s):  
Bahaa El Sharnouby ◽  
Milos Novak
Keyword(s):  
Load Distribution ◽  
Group Analysis ◽  
Vertical Plane ◽  
Ground Surface ◽  
Pile Group ◽  
Lateral Loads ◽  
Pile Groups ◽  
Group Evaluation ◽  
Interaction Factors ◽  
Single Piles

Flexibility coefficients of single piles and interaction factors established for groups of two piles are presented to facilitate analysis of arbitrary pile groups exposed to static horizontal loads. Such an analysis may yield pile group flexibility, stiffness, deflection, and distribution of loads on individual piles. The data given are complete in that they include horizontal translation, rotation in the vertical plane, and cross effects between the two, making it possible to establish complete stiffness and flexibility matrices of pile groups provided with either rigid caps or arbitrarily flexible caps. Homogeneous, parabolic, and linear (Gibson's) soil profiles are considered and the piles may have a free length sticking above the ground surface. The methods of group evaluation based on superposition of interaction factors are reviewed and compared and numerical examples are given. Key words: piles, pile groups, lateral loads, flexibility, stiffness, load distribution.

A numerical study into lateral cyclic nonlinear soil–pile response

2008 ◽  
Vol 45 (9) ◽  
pp. 1268-1281 ◽  
Author(s):  
Nii Allotey ◽  
M. Hesham El Naggar
Keyword(s):  
Pile Foundation ◽  
Numerical Study ◽  
Ground Level ◽  
Winkler Foundation ◽  
Lateral Stiffness ◽  
Lateral Loads ◽  
Below Ground ◽  
Single Piles ◽  
Soil Cave ◽  
Pile Response

Pile foundations are generally designed to resist both axial and lateral loads. Under lateral cyclic loading, the response of the pile foundation is affected by factors such as soil and pile yielding, gapping, and soil cave-in. These factors directly influence the effective lateral stiffness and strength of the foundation and can govern the design. In this paper, two case studies of single piles, one in clay and one in sand, are used to examine the influence of the aforementioned factors on nonlinear cyclic response of piles. The numerical study is conducted using a recently developed beam on a nonlinear Winkler foundation (BNWF) model. The results of the study point to the important role soil cave-in and recompression play in the cyclic soil–pile response, and elucidate how this could particularly be beneficial to piles that develop plastic hinges below ground level.

Sign in / Sign up

Export Citation Format

Share Document