Download or read book Response of Piles in Loess to Lateral Loads written by Karen A. Clowers and published by . This book was released on 1992 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Lateral Load deflection Response of Piles in Dense Cohesionless Soil written by Chee Hwa Yu and published by . This book was released on 1988 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response of Pile Foundations Due to Lateral Force and Soil Movements written by Hongyu Qin and published by . This book was released on 2010 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : This research has investigated the response of pile foundations subjected to lateral force applied directly to pile head and loadings arising from lateral soil movements of the surrounding ground. The behaviour of pile foundations subjected to lateral soil movements was studied through physical modelling with a specially designed testing apparatus. Laboratory experiments have been undertaken on a single pile embedded in progressive moving sand. A triangular loading block was used in the model tests to induce a progressive soil movement profile. Apart from eight general tests, sixteen tests were conducted on a single pile to examine the effects of the distance between the source where soil movements were induced and the pile location, the magnitude of axial load applied at pile head, the variation of loading block angle, varying combination of sliding and stable layer depths, and pile diameter on the responses of piles. The results of previously conducted pile tests with a uniform soil movement profile were compared with those of the current tests to examine the effect of soil movement profiles on the pile behaviour. Simple solutions were proposed for predicting the pile responses. They provided good estimate of the development of maximum bending moment and maximum shear force in the piles with soil movement. Importantly, the maximum bending moments induced by the soil movements were found to be linearly related to the maximum shear forces (sliding thrust), independent of the magnitude and depth of soil movement and soil movement profiles. Experiments have also been conducted on pile groups in progressive moving sand, including various pile group configurations and spacing. Both free-head and cappedhead fixity conditions have been considered. The findings show that the resistances of the piles to lateral soil movements significantly rely on their locations in a group, especially for piles arranged in a line parallel to the soil movement direction. The results of the pile group tests were compared with those of the single pile tests. Group factors were defined in terms of maximum bending moment and modulus of subgrade reaction to quantify the impact of group effect. The simple solutions developed were extended for predicting the response of individual piles in a group with soil movement. The static and cyclic responses of laterally loaded piles in cohesionless soils have been investigated as well. Guideline for estimating the design parameters for laterally loaded rigid piles in cohesionless soils were provided from extensive back calculation of measured responses of fifty-one pile tests. The elastic-plastic solutions presented by Guo (2008) were used in the back calculation. Simple expressions were presented for estimating the parameters used in the solutions. The reliability of the back calculation, the effects of the ratio of loading eccentricity to pile embedded length on the nonlinear pile response and lateral load capacity were investigated. Additionally, the apparatus was modified to apply cyclic lateral loading, with which a series of model tests were conducted on piles in dry sand under static and cyclic loadings. Analyses of the test results show that the cyclic load level has a greater impact on the pile behaviour than the number of cycles. It is noted that the gradient of the limiting force profile will decrease and the modulus of subgrade reaction will increase, after a number of unloading and reloading cycles. The induced maximum bending moment can be estimated from the applied lateral load, eccentricity of the load, and the depth at which the maximum bending moment occurs.

Download or read book Implementation of Laterally Loaded Piles in Multi Layer Soils written by Monica Prezzi and published by Purdue University Press. This book was released on 2009-11-15 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pile groups under cyclic lateral loading written by Christoph Niemann and published by BoD – Books on Demand. This book was released on 2020-01-01 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is the aim of this research work is to investigate and to assess quatitatively as well as quantitatively the bearing behaviour of pile groups subjected to cyclic lateral loading. In this context, the influences of different boundary conditions, in particular the soil properties and the pile group geometry are to be analysed experimentally and numerically. Based on a brief literature review in chapter 2, model tests (centrifuge and small-scale at 1g) and numerical investigations have been carried out to contribute to a better understanding of the cyclic behaviour of pile groups. Chapter 3 describes the test procedure and summarises the results of centrifuge tests, which have been carried out at the Centre for Offshore Foundation Systems (COFS) in Perth, Australia. Further investigations have been carried out by means of smallscale model tests at 1g in the testing facilities at the University of Kassel, Germany, with the results as summarised in chapter 4. A comparison of individual results of both test series is provided in chapter 5. The numerical studies in chapter 6 have been carried out in order to analyse the general ability of numerical simulations to calculate the response of pile groups to cyclic lateral loading. Based on the previously derived results, chapter 7 provides equations that can be applied to estimate the cyclic accumulation of lateral displacements of pile groups as well as the cyclic changes of the load distribution within pile groups.

Download or read book Single Piles and Pile Groups Under Lateral Loading written by Lymon C Reese and published by CRC Press. This book was released on 2000-01-01 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book The Response of Flexible Piles to Lateral Loading written by Mark Felton Randolph and published by . This book was released on 1980 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response of Piles to Lateral Load and Base Motion written by Alvaro H. Velez Trujillo and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Symposium on Lateral Load Tests on Piles written by American Society for Testing Materials and published by . This book was released on 1954 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lateral Response of Piles in Saturated Cohesionless Soils written by Peter James Algie and published by . This book was released on 2012 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the lateral response of single piles embedded in saturated cohesionless soils on flat ground, with no crust layer. OpenSeesPL, a numerical modelling software programme, was used as the principal means of this investigation. Several 'rules of thumb' that could be used in pseudo-static methods were developed. Soil-pile interaction in saturated cohesionless soils is a changing and multi-variable problem, and therefore is not well understood. This is because the soil is prone to liquefaction when subject to dynamic loads. These variables include changing soil stiffness and damping, changing soil-pile-structure resonant frequency and changing loads. The response of piles subject to lateral static pushover loads was considered. OpenSeesPL and an elastic continuum pile analysis method proposed by Budhu and Davies (1987) can predict lateral pile response reasonably accurately. Initial soil stiffness equal to approximately 1/3 to 1/4 of the small strain moduli should be used. The friction angle in both analysis methods has to account for strain softening beyond peak resistance in dense sands. Pile response subject to lateral dynamic loads at the pile head was analysed. It was found that piles dynamically loaded at the pile head can lead to the adjacent soil liquefying, which reduces the soil stiffness and increases the strain dependent material damping. Nonlinear OpenSeesPL models and an inertial pseudo-static method along with the Budhu and Davies method for elastic soils with appropriate reductions in soil stiffness can be used to reasonably predict the response of piles dynamically excited at the pile head. The lateral response of piles subject to dynamic excitation of the underlying bedrock was investigated. Maximum ground surface accelerations and pile response in liquefiable soils was found to occur during an initial transient phase before the onset of full liquefaction. During this phase, the soil has a linear stiffness distribution with depth and the soil stiffness near the ground surface (i.e. at one pile diameter) is equal to approximately 20% of the initial stiffness at that depth. An elastic equivalent pseudo- static method for determining lateral pile response subject to kinematic and inertial interaction was developed.

Download or read book Piles Under Dynamic Loads written by Shamsher Prakash and published by . This book was released on 1992 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: GSP 34 contains 12 papers on pile foundations under dynamic loads presented at sessions of the ASCE National Convention, held in New York, New York, September 13-17, 1992.

Download or read book Pile Response to Liquefaction induced Lateral Spread written by Wolfgang Daniel Meyersohn and published by . This book was released on 1994 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Soil Slope on Lateral Capacity of Piles in Cohesive and Cohesionless Soils written by Nontapat Nimityongskul and published by . This book was released on 2012 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of full-scale lateral loading tests for instrumented piles in cohesive and cohesionless soils were carried out at Oregon State University to assess the lateral response of piles in freefield and near slope conditions. Instrumentation data from the free-field piles and the piles installed at different distances from the slope crest were used extensively to monitor lateral pile response and to back-calculate p-y curves. For the cohesive soil tests, it was found that for small pile head displacements (less than 1.0 inch), the proximity of slope has insignificant effects on piles 2D or further from the slope crest where D is the pile diameter. For the piles on the slope crest, the effects of the soil slope should always be considered. The presence of the slope has insignificant effects for piles installed at distances of 8D or greater from the crest. For the cohesionless soil tests, the effects of slope on lateral pile capacity are insignificant at displacements of less than 2.0 inches for piles located 2D and further from the crest. For piles located at 4D or greater from the slope crest, the effects of slope on p-y curves are insignificant.

Download or read book Effects of Soil Slope on Lateral Capacity of Piles in Cohesive Soils written by Nontapat Nimityongskul and published by . This book was released on 2011 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pile supported bridges are typically constructed near or in a natural or man-made slope and are subjected to lateral loading. The current design method for laterally loaded piles involves the use of Winkler's spring concept with the standard nonlinear p-y curves. The available p-y curves were developed based on results of full-scale lateral loading tests for piles in level ground. Due to limited test results from full-scale lateral loading tests for piles installed near a slope, current practice has no specific procedures for the design of piles in such condition. This study is aimed at obtaining a better understanding of the effects of slope on lateral capacity of piles through experimental and analytical programs. A series of full-scale lateral loading tests on instrumented piles in cohesive soils were conducted at Oregon State University in 2009 to assess the behavior of laterally loaded piles in free-field and near slope conditions. Data from the tests was used to backcalculate p-y curves. It was found that for small soil displacements (i.e., less than 0.5 inch), the proximity of slope has small to insignificant effect on the lateral pile response. At larger soil displacements, the proximity of slope adversely affected the lateral capacity of the soil-pile system and consequently the p-y curves. Specifically with regard to Caltrans Bridge Design Specifications Article 4.5.6.5.1, for maximum allowable pile deflection of 1/4-inch under Service Limit State Load, the soil slope appears to have insignificant effects for piles installed at 2D or further from the slope crest, where D is the pile diameter. For piles installed on the slope crest (0D), the effects of slope are most pronounced and should be considered at all displacement levels. The effects of slope on the lateral capacity were insignificant for piles installed at distances of 8D or greater from the slope crest. Based on comparisons of the back-calculated p-y curves from these experiments, p-multipliers are proposed as a function of soil displacement to account for slope effects. Using the full-scale test results, the capability of available p-y curves to predict the lateral response of free-field piles was evaluated. It was found that standard p-y curves available in the literature for cohesive soils give reasonable predictions of the lateral pile response for free-field piles. Hyperbolic p-y criteria appear to be most suitable to describe the back-calculated baseline p-y curves from this study. In addition, the capability of existing p-y recommendation for piles on a slope crest was evaluated; design guidelines based on the findings from this study is presented. Finally, the finite element program Plaxis 3D was used to simulate the lateral loading tests. The procedure was validated by comparing the computed results with the full-scale test results.

Download or read book Highway Research Abstracts written by and published by . This book was released on 1992 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annotated Bibliography of Lateral Loads on Piles 1917 1958 written by Illinois, University. Engineering experiment station and published by . This book was released on 1960 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response Analysis and Design of Pile Groups Subjected to Static Dynamic Lateral Loads written by Kyle M. Rollins and published by . This book was released on 2003 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: