Load And Resistance Factor Design Lrfd For Deep Foundations
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Load And Resistance Factor Design Lrfd For Deep Foundations
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Author : Samuel G. Paikowsky
language : en
Publisher: Transportation Research Board
Release Date : 2004
Load And Resistance Factor Design Lrfd For Deep Foundations written by Samuel G. Paikowsky and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Bridges categories.
Introduction and research approach -- Findings -- Interpretation, appraisal, and applications -- Conclusions and suggested research -- Bibliography -- Appendixes.
Nchrp Report 507
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Author :
language : en
Publisher:
Release Date : 2004
Nchrp Report 507 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Limit States Design Lsd For Shallow And Deep Foundations
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Author : Kevin C. Foye
language : en
Publisher:
Release Date : 2004-12-01
Limit States Design Lsd For Shallow And Deep Foundations written by Kevin C. Foye and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-12-01 with Transportation categories.
Load and Resistance Factor Design (LRFD) shows promise as a viable alternative to the present working stress design (WSD) approach to foundation design. The key improvements of LRFD over the traditional Working Stress Design (WSD) are the ability to provide a more consistent level of reliability and the possibility of accounting for load and resistance uncertainties separately. In order for foundation design to be consistent with current structural design practice, the use of the same loads, load factors and load combinations would be required. In this study, we review the load factors presented in various LRFD Codes from the US, Canada and Europe. For LRFD to gain acceptance in geotechnical engineering, a framework for the objective assessment of resistance factors is needed. Such a framework, based on reliability analysis is proposed in this study. Probability Density Functions (PDFs), representing design variable uncertainties, are required for analysis. A systematic approach to the selection of PDFs is presented. Such a procedure is a critical prerequisite to a rational probabilistic analysis in the development of LRFD methods in geotechnical engineering. Additionally, in order for LRFD to fulfill its promise for designs with more consistent reliability, the methods used to execute a design must be consistent with the methods assumed in the development of the LRFD factors. In this study, a methodology for the estimation of soil parameters for use in design equations is proposed that should allow for more statistical consistency in design inputs than is possible in traditional methods. Resistance factor values are dependent upon the values of load factors used. Thus, a method to adjust the resistance factors to account for code-specified load factors is also presented. The various considered methods obtain their input parameters from the CPT, the SPT, or laboratory testing. Designers may wish to use design methods that are not considered in this study. As such, the designer needs the capability to select resistance factors that reflect the uncertainty of the design method chosen. A methodology is proposed in this study to accomplish this task, in a way that is consistent with the framework.
Development Of Load And Resistance Factor Design For Ultimate And Serviceability Limit States Of Transportation Structure Foundations
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Author : Rodrigo Salgado
language : en
Publisher: Purdue University Press
Release Date : 2011-10-12
Development Of Load And Resistance Factor Design For Ultimate And Serviceability Limit States Of Transportation Structure Foundations written by Rodrigo Salgado and has been published by Purdue University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-10-12 with Transportation categories.
Most foundation solutions for transportation structures rely on deep foundations, often on pile foundations configured in a way most suitable to the problem at hand. Design of pile foundation solutions can best be pursued by clearly defining limit states and then configuring the piles in such a way as to prevent the attainment of these limit states. The present report develops methods for load and resistance factor design (LRFD) of piles, both nondisplacement and displacement piles, in sand and clay. With the exception of the method for design of displacement piles in sand, all the methods are based on rigorous theoretical mechanics solutions of the pile loading problem. In all cases, the uncertainty of the variables appearing in the problem and of the relationships linking these variables to the resistance calculated using these relationships are carefully assessed. Monte Carlo simulations using these relationships and the associated variabilities allow simulation of resistance minus load distributions and therefore probability of failure. The mean (or nominal) values of the variables can be adjusted so that the probability of failure can be made to match a target probability of failure. Since an infinite number of combinations of these means can be made to lead to the same target probability of failure, we have developed a way to determine the most likely ultimate limit state for a given probability of failure. Once the most likely ultimate limit state is determined, the values of loads and resistances for this limit state can be used, together with the values of the mean (or nominal) loads and resistances to calculate load and resistance factors. The last step in the process involves adjusting the resistance factors so that they are consistent with the load factors specified by AASHTO. Recommended resistance factors are then given together with the design methods for which they were developed.
Geotechnical Related Development And Implementation Of Load And Resistance Factor Design Lrfd Methods
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Author : George G. Goble
language : en
Publisher: Transportation Research Board
Release Date : 1999
Geotechnical Related Development And Implementation Of Load And Resistance Factor Design Lrfd Methods written by George G. Goble and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Bridges categories.
This synthesis report will be of interest to geotechnical, structural, and bridge engineers, especially those involved in the development and implementation of the geotechnical aspects of the AASHTO Bridge Code. The synthesis documents a review of geotechnical related LRFD specifications and their development worldwide to compare them with the current AASHTO LRFD Bridge Code. Design procedures for foundations, earth retaining structures, and culverts are summarized and compared with the methods specified by the AASHTO code. This TRB report provides information designed to assist engineers in implementing the geotechnical features of LRFD methods. Information for the synthesis was collected by surveying U.S. and Canadian transportation agencies and by conducting a literature search using domestic and international sources. Interviews were also conducted with selected international experts. The limited available experience in the United States and information from international practice are discussed to understand the problems that have arisen in order that solutions may be found. Based on the studies reported here, suggestions for improving the code are identified.
Lrfd Design And Construction Of Shallow Foundations For Highway Bridge Structures
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Author :
language : en
Publisher: Transportation Research Board National Research
Release Date : 2010
Lrfd Design And Construction Of Shallow Foundations For Highway Bridge Structures written by and has been published by Transportation Research Board National Research this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Technology & Engineering categories.
This report develops and calibrates procedures and modifies the AASHTO LRFD Bridge Design Specifications, Section 10-Foundations for the Strength Limit State Design of Shallow Foundations. The material in this report will be of immediate interest to bridge engineers and geotechnical engineers involved in the design of shallow foundations.
Foundation Design Codes And Soil Investigation In View Of International Harmonization And Performance Based Design
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Author : Y. Honjo
language : en
Publisher: CRC Press
Release Date : 2002-01-01
Foundation Design Codes And Soil Investigation In View Of International Harmonization And Performance Based Design written by Y. Honjo and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-01-01 with Technology & Engineering categories.
The contributions contained in these proceedings are divided into three main sections: theme lectures presented during the pre-workshop lecture series; keynote lectures and other contributed papers; and a translation of the Japanese geotechnical design code.
Nondestructive Testing Of Deep Foundations
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Author : Bernard Hertlein
language : en
Publisher: John Wiley & Sons
Release Date : 2007-01-11
Nondestructive Testing Of Deep Foundations written by Bernard Hertlein and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-01-11 with Technology & Engineering categories.
Nondestructive Testing involves the use of methods such as wave propagation, electromagnetism, electrical conductivity, and thermal conductivity to test structural integrity and thereby allow nondestructive assessment of structures and the possibility of structural failures before they occur. Nondestructive Testing of Deep Foundations covers different techniques designed to provide information about the integrity and quality of the material that makes up a deep foundation. Nondestructive Testing methods are used at all stages of a structure's life - from new construction quality control to residual lifetime prediction, and even during the monitoring of demolition. In addition, Nondestructive Testing is being increasingly specified in deep foundation projects, though often without a good understanding of its limitations and with the result that methods are often misused. In order to be able to specify an appropriate method, or to recognize an inappropriate specification, it is necessary for the engineer, specifier and/or contractor to understand the capabilities and limitations of each of the methods currently in use. Nondestructive Testing of Deep Foundations: Describes the most commonly used deep foundation construction techniques, including typical use of material Provides a brief history of the development of commercially available nondestructive methods Summarises each method's capabilities and limitations Acts as a one stop reference drawing together resources only previously available in conference proceedings and journal papers This manual will prove to be a welcome addition to the bookshelf of all practitioners in civil/structural and geotechnical engineering and architecture. It will also provide a valuable insight into this highly technical field for university researchers, lecturers and postgraduate students in civil/structural and geotechnical engineering.
Advances In Deep Foundations
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Author : Yoshiaki Kikuchi
language : en
Publisher: Taylor & Francis
Release Date : 2007-06-21
Advances In Deep Foundations written by Yoshiaki Kikuchi and has been published by Taylor & Francis this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-06-21 with Technology & Engineering categories.
Civil Engineering has recently seen enormous progress in the core field of the construction of deep foundations. This book is the result of the International Workshop on Recent Advances in Deep Foundations (IWDPF07), which was held in Yokosuka, Japan from the 1st to the 2nd of February, 2007. Topics under discussion in this book include recent rese
The Foundation Engineering Handbook Second Edition
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Author : Manjriker Gunaratne
language : en
Publisher: CRC Press
Release Date : 2013-11-26
The Foundation Engineering Handbook Second Edition written by Manjriker Gunaratne and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-26 with Technology & Engineering categories.
Considering how structures interact with soil, and building proper foundations, is vital to ensuring public safety and to the longevity of buildings. Understanding the strength and compressibility of subsurface soil is essential to the foundation engineer. The Foundation Engineering Handbook, Second Edition provides the fundamentals of foundation engineering needed by professional engineers and engineering students. It presents both classical and state-of-the-art design and analysis techniques for earthen structures and examines the principles and design methods of foundation engineering needed for design of building foundations, embankments, and earth retaining structures. It covers basic soil mechanics, and soil and groundwater modeling concepts, along with the latest research results. What’s New in the Second Edition: Adds alternative analytical techniques to nearly every chapter Supplements existing material with new content Includes additional applications in the state of the art such as unsaturated soil mechanics, analysis of transient flow through soils, deep foundation construction monitoring based on thermal integrity profiling, and updated ground remediation techniques Covers reliability-based design and LRFD (load resistance factor design) concepts not addressed in most foundation engineering texts Provides more than 500 illustrations and over 1,300 equations The text serves as an ideal resource for practicing foundation and geotechnical engineers, as well as a supplemental textbook for both undergraduate and graduate levels.