Elastic Analysis Of Axial Load Displacement Behavior Of Single Driven Piles
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Elastic Analysis Of Axial Load Displacement Behavior Of Single Driven Piles
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Author : Cem Akgüner
language : en
Publisher:
Release Date : 2007
Elastic Analysis Of Axial Load Displacement Behavior Of Single Driven Piles written by Cem Akgüner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Axial loads categories.
Deep foundations are commonly recommended when large displacements are expected. Typically, though, their design involves only checking and providing for sufficient capacity to carry the applied loads. Load-displacement behavior of piles is considered secondary to the axial capacity; displacements are ordinarily overlooked or not calculated if and when the estimated pile capacity is two to three times the design or expected loading. However, in cases, such as long piles or piles in dense cohesionless soils, displacements can be the critical factor in design or it could be a structural requirement to limit the displacements. In this dissertation, the displacements of axially loaded single piles are investigated by conducting analyses with the aid of an approach based on elasticity. The original solution predicting displacements due to a vertical load within a semi-infinite soil mass has been modified for varying soil conditions and layering, and assumptions of stresses and displacements acting on the soil-pile interface. Aside from the available/known factors of the pile (length, diameter, cross-sectional area, etc.) and the layering of the surrounding soil, Young's modulus and Poisson's ratio of the soil encompassing a pile are the unknowns required as input to obtain predictions based on the elastic method. In this study, attention is directed towards determining Young's modulus because the range and variability of Poisson's ratio is not significant in displacement calculations. Axial pile load testing data were provided by the California Department of Transportation as part of a project to improve its general approach to pile design. All of the tested piles were driven into the ground. Measurements of displacements and loads were made only at the top of the pile. Supplementary in-situ testing involving cone penetration (CPT) and standard penetration (SPT), drilling, and sample collection, were conducted in addition to laboratory testing to enhance the available information. In this research, predicted displacements are compared with those deduced from pile load tests. Two sets of predictions based on elastic method are conducted for comparing displacements. First, various correlations for Young's modulus are employed to determine how accurately each predicts the actual measured displacement. The chosen correlations utilize laboratory triaxial undrained shear strength and standard penetration test blowcount for cohesive and cohesionless soils, respectively. Secondly, the same data are also utilized to obtain back-calculated values of Young's moduli for analyses involving the elastic method. The measured displacements at loads of a third, a half, twothirds, and equal to the failure load were matched iteratively. Results from this research are deemed to have an impact on engineering practice by improving the determination of Young's modulus for displacement analyses involving the elastic method. A unique approach that has potential is the reconciliation of load ratios (percentage of failure load) with displacement calculations to provide a better overview of the range of load ratios for which these newly formulated correlations may be employed. Through this research, it is anticipated that better determination of soil parameters for elastic analysis of axial pile displacements can be made by researchers and engineers alike.
Single Piles In Liquefiable Ground
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Author : Rui Wang
language : en
Publisher: Springer
Release Date : 2016-03-17
Single Piles In Liquefiable Ground written by Rui Wang and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-03-17 with Science categories.
This thesis focuses on the seismic response of piles in liquefiable ground. It describes the design of a three-dimensional, unified plasticity model for large post-liquefaction shear deformation of sand, formulated and implemented for parallel computing. It also presents a three-dimensional, dynamic finite element analysis method for piles in liquefiable ground, developed on the basis of this model,. Employing a combination of case analysis, centrifuge shaking table experiments and numerical simulations using the proposed methods, it demonstrates the seismic response patterns of single piles in liquefiable ground. These include basic force-resistance mode, kinematic and inertial interaction coupling mechanism and major influence factors. It also discusses a beam on the nonlinear Winkler foundation (BNWF) solution and a modified neutral plane solution developed and validated using centrifuge experiments for piles in consolidating and reconsolidating ground. Lastly, it studies axial pile force and settlement during post-earthquake reconsolidation, showing pile axial force to be irrelevant in the reconsolidation process, while settlement is process dependent.
Proceedings
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Author :
language : en
Publisher:
Release Date : 1964
Proceedings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Piling (Civil engineering) categories.
Single Piles And Pile Groups Under Lateral Loading
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Author : Lymon C Reese
language : en
Publisher: CRC Press
Release Date : 2000-01-01
Single Piles And Pile Groups Under Lateral Loading written by Lymon C Reese and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-01-01 with Technology & Engineering categories.
Guiding the professional through the complexities of lateral-load design, this book and CD-ROM combination introduces the procedures involved in piles and pile group design. This is a problem that can only be solved by accounting for the soil resistance as related to the lateral deflection of the pile. Intricate equations are derived and fully explained, enabling the designer to find the critical loads, either causing a pile to be overloaded or causing too much lateral deflection. The CD-ROM contains simplified versions of two required programs that allow the reader to check the solutions of some of the examples given in the book and to find answers to related problems.
Axial Load Tests And Analysis For Open Ended Steel Tubular Piles Driven Into Weathered Rock
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Author : Yi Han
language : en
Publisher:
Release Date : 1999
Axial Load Tests And Analysis For Open Ended Steel Tubular Piles Driven Into Weathered Rock written by Yi Han and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
The bearing capacity of tubular, open-ended steel piles driving into weathered rock was investigated using static load tests, finite element analysis and dynamic load tests. Dynamic load tests were carried out by using the Case Method and the CAPWAP Method which were used to determine the bearing capacity of piles. The effects of final set, pile burial length, setup and other factors on the pile bearing capacity were evaluated. In the static load tests, two piles with 0.813 m diameter and one pile with a diameter of 1.0 m were tested. The finite element analysis was performed to back calculate the load-displacement response of piles. A hyperbolic model for soils and an elastic-plastic model for rocks were used in the study. A parametric study was also carried out. The issues, such as the effects of pile installation and soil plug, were discussed.
Predicting The Ultimate Axial Resistance Of Single Driven Piles
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Author : Rollins Patrick Brown
language : en
Publisher:
Release Date : 2001
Predicting The Ultimate Axial Resistance Of Single Driven Piles written by Rollins Patrick Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Piling (Civil engineering) categories.
Experimental And Simple Semiempirical Methods For Interpreting The Axial Load Versus Settlement Behaviors Of Single Model Piles In Unsaturated Sands
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Author : Sai K. Vanapalli
language : en
Publisher:
Release Date : 2018
Experimental And Simple Semiempirical Methods For Interpreting The Axial Load Versus Settlement Behaviors Of Single Model Piles In Unsaturated Sands written by Sai K. Vanapalli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Geosynthetics categories.
Experimental studies were undertaken to investigate the vertical load versus displacement behavior of single model piles in sand (i.e., Unimin 7030 sand) under both saturated and unsaturated conditions. Stainless steel model piles with three different diameters (i.e., 19.25, 31.75, and 38.3 mm) with a length of 350 mm were used to conduct the pile load tests. Semiempirical methods were proposed to successfully predict the variation of end- and shaft-bearing capacities of single piles with respect to matric suction by modifying three conventional end-bearing capacity equations (Terzaghi 1943; Hansen 1970; Janbu 1976) and the ?-method (Burland 1973), respectively. In addition, finite element analyses were also carried out to simulate vertical load versus settlement behaviors of model pile tests using a commercial finite element software, SIGMA/W (GeoStudio 2007).
The Inelastic Behaviour Of Reinforced Concrete Piles And Pile Shafts
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Author : Andrew M. Budek
language : en
Publisher:
Release Date : 1997
The Inelastic Behaviour Of Reinforced Concrete Piles And Pile Shafts written by Andrew M. Budek and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Numerical Methods In Offshore Piling
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Author : Institution of Civil Engineers (Great Britain)
language : en
Publisher: Thomas Telford Publishing
Release Date : 1980
Numerical Methods In Offshore Piling written by Institution of Civil Engineers (Great Britain) and has been published by Thomas Telford Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Technology & Engineering categories.
Static And Dynamic Lateral Loading Of Pile Groups
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Author : Dan A. Brown
language : en
Publisher:
Release Date : 2001
Static And Dynamic Lateral Loading Of Pile Groups written by Dan A. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Technology & Engineering categories.