Effect Of Diameter On The Behavior Of Laterally Loaded Piles In Weakly Cemented Sand
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Effect Of Diameter On The Behavior Of Laterally Loaded Piles In Weakly Cemented Sand
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Author : Teerawut Juirnarongrit
language : en
Publisher:
Release Date : 2002
Effect Of Diameter On The Behavior Of Laterally Loaded Piles In Weakly Cemented Sand written by Teerawut Juirnarongrit and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Transportation Research Record
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Author :
language : en
Publisher:
Release Date : 1974
Transportation Research Record written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Electronic traffic controls categories.
Development Of Generalized Pseudostatic P Y Curves For Liquefied Sands
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Author : Osman Amr El Menchawi
language : en
Publisher:
Release Date : 2006
Development Of Generalized Pseudostatic P Y Curves For Liquefied Sands written by Osman Amr El Menchawi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Response Of Pile Foundations Due To Lateral Force And Soil Movements
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Author : Hongyu Qin
language : en
Publisher:
Release Date : 2010
Response Of Pile Foundations Due To Lateral Force And Soil Movements written by Hongyu Qin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Electronic dissertations categories.
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.
Fhwa Supported Structures Research Seismic Behavior Of Micropiles
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Author : Adrian Rodriguez-Marek
language : en
Publisher:
Release Date : 2005
Fhwa Supported Structures Research Seismic Behavior Of Micropiles written by Adrian Rodriguez-Marek and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Earthquake resistant design categories.
Dsc Hiss Modeling Applications For Problems In Mechanics Geomechanics And Structural Mechanics
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Author : Chandrakant S. Desai
language : en
Publisher: CRC Press
Release Date : 2023-11-30
Dsc Hiss Modeling Applications For Problems In Mechanics Geomechanics And Structural Mechanics written by Chandrakant S. Desai and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-11-30 with Technology & Engineering categories.
Understanding the mechanical behavior of solids and contacts (interfaces and joints) is vital for the analysis, design, and maintenance of engineering systems. Materials may simultaneously experience the effects of many factors such as elastic, plastic, and creep strains; different loading (stress) paths; volume change under shear stress; and microcracking leading to fracture and failure, strain softening, or degradation. Typically, the available models account for only one factor at a time; however, the disturbed state concept (DSC) with the hierarchical single-surface (HISS) plasticity is a unified modeling approach that can allow for numerous factors simultaneously, and in an integrated manner. DSC/HISS Modeling Applications for Problems in Mechanics, Geomechanics, and Structural Mechanics provides readers with comprehensive information including the basic concepts and applications for the DSC/HISS modeling regarding a wide range of engineering materials and contacts. Uniformity in format and content of each chapter will make it easier for the reader to appreciate the potential of using the DSC/HISS modeling across various applications. Features: • Presents a new and simplified way to learn characterizations and behaviors of materials and contacts under various conditions • Offers modeling applicable to several different materials including geologic (clays, sands, rocks), modified geologic materials (structured soils, overconsolidated soils, expansive soils, loess, frozen soils, chemically treated soils), hydrate-bearing sediments, and more.
Lateral Load Capacity Of Single Piles Socketed Into Melbourne Mudstone
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Author : Wai Loong Chong
language : en
Publisher:
Release Date : 2011
Lateral Load Capacity Of Single Piles Socketed Into Melbourne Mudstone written by Wai Loong Chong and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Industrial practice often adopts analytical methods developed for soils based on the continuum approach when designing laterally-loaded piles socketed into rock mass. High safety considerations and the uncertainties arising from the assumption of continuum rock mass may produce inefficient and unsafe design solutions to foundation problems subjected to lateral loads. To date, the research in the area of laterally-loaded rock-socketed piles has not been advanced sufficiently. The available analytical methods assume rocks to be intact and homogenous materials, and the physical effect of joints is not taken into account. Therefore, this study aims to develop an analytical method for laterally-loaded piles socketed into rock mass incorporating the physical effect of joints. A three-dimensional distinct element code, 3DEC, was utilised to simulate the behaviour of laterally-loaded piles socketed into mudstone rock. The capability of 3DEC to model jointed rock mass was first examined by simulating the confined (triaxial) and unconfined (uniaxial compressive test) loading conditions. The results obtained from this modelling were compared with existing empirical relationships and field test data. 3DEC was then employed to simulate laboratory-scale model pile-load tests. A comprehensive parametric study was carried out based on the calibrated laboratory 3DEC model. It was found that the most influential parameters impacting the lateral behaviour of piles socketed into jointed mudstone are rock modulus, pile diameter, pile bending stiffness, pile socket length, joint dip angle and spacing. Based on the understanding of the key influential parameters affecting lateral load behaviour, 3DEC modelling was extended further to simulate full-scale pile load tests conducted in Melbourne mudstone. Based on extensive numerical modelling, the p-y behaviour of piles socketed into mudstone was derived. It was found that a single p-y curve for mudstone accurately predicts pile-head load-deflection behaviour. Subsequently, a thorough parametric study based on full-scale models was carried out to study the effect of joints on the lateral load capacity of piles. This study found that joint sets in different directions have a significant impact on the p-y and the corresponding pile-head load-deflection behaviour. The worst-case condition of four joint sets reduces the load-carrying capacity of the pile by more than 90% compared to a homogenous mudstone. This is due to the deformation mechanisms of the pile-rock system such as the formation of weak wedges/pyramid blocks around the pile. The results obtained from the extensive parametric study were integrated in the derivation of new p-y criteria for laterally-loaded piles socketed into homogenous and jointed mudstone rocks. The p-y criteria developed require basic rock properties which can be conveniently obtained in the laboratory or using the well-established empirical relationships for mudstone based on water content. The p-y criterion proposed for homogenous mudstone condition was validated using the results of another two field pile-load tests. For the p-y criterion of jointed mudstone, a field load test of a pile with an apparent steep joint in the vicinity of the pile was employed to validate its accuracy. It was found that the p-y criterion for jointed mudstone gives a slightly more conservative prediction of the pile-head load-deflection response. It is suggested that the p-y criterion for homogenous and jointed mudstone conditions will provide the upper and lower bound solutions, respectively. This study has successfully developed an analytical method for laterally-loaded piles socketed into mudstone. The proposed design approach pioneers the integration of the physical effect of joints on the p-y behaviour of piles socketed into jointed mudstone. The proposed p-y criteria were validated using field pile load tests and very close predictions were achieved.
Reliability Based Design In Soil And Rock Engineering
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Author : Bak Kong Low
language : en
Publisher: CRC Press
Release Date : 2021-11-01
Reliability Based Design In Soil And Rock Engineering written by Bak Kong Low and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-11-01 with Technology & Engineering categories.
This book contains probabilistic analyses and reliability-based designs (RBDs) for the enhancement of Eurocode 7 (EC7) and load and resistance factor design (LRFD) methods. An intuitive perspective and efficient computational procedure for the first-order reliability method (FORM, which includes the Hasofer–Lind reliability index) is explained, together with discussions on the similarities and differences between the design point of EC7/LRFD and RBD-via-FORM. Probability-based designs with respect to the ultimate and serviceability limit states are demonstrated for soil and rock engineering, including shallow and deep foundations, earth-retaining structures, soil slopes, 2D rock slopes with discontinuities, 3D rock slopes with wedge mechanisms, and underground rock excavations. Renowned cases in soil and rock engineering are analyzed both deterministically and probabilistically, and comparisons are made with other probabilistic methods. This book is ideal for practitioners, graduate students and researchers and all who want to deepen their understanding of geotechnical RBD accounting for uncertainty and overcome some limitations and potential pitfalls of the evolving LRFD and EC7. Solutions for the book’s examples are available online and are helpful to acquire a hands-on appreciation: https://www.routledge.com/9780367631390.
Single Piles And Pile Groups Under Lateral Loading
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Author : Lymon C. Reese
language : en
Publisher: CRC Press
Release Date : 2010-12-15
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 2010-12-15 with Technology & Engineering categories.
The complexities of designing piles for lateral loads are manifold as there are many forces that are critical to the design of big structures such as bridges, offshore and waterfront structures and retaining walls. The loads on structures should be supported either horizontally or laterally or in both directions and most structures have in common t
The Effects Of Gapping On Pile Behaviour Under Lateral Cyclic Loading
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Author : Satyawan Pranjoto
language : en
Publisher:
Release Date : 2000
The Effects Of Gapping On Pile Behaviour Under Lateral Cyclic Loading written by Satyawan Pranjoto and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Load factor design categories.