Simplified Techniques For Evaluation And Interpretation Of Pavement Deflections For Network Level Analysis
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Simplified Techniques For Evaluation And Interpretation Of Pavement Deflections For Network Level Analysis
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Author : U.s. Department of Transportation
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-07-23
Simplified Techniques For Evaluation And Interpretation Of Pavement Deflections For Network Level Analysis written by U.s. Department of Transportation and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-23 with categories.
Simplified techniques for evaluation and interpretation of pavement deflections for network-level analysis /
Simplified Techniques For Evaluation And Interpretation Of Pavement Deflections For Network Level Analysis
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Author : Régis Luis Carvalho
language : en
Publisher:
Release Date : 2012
Simplified Techniques For Evaluation And Interpretation Of Pavement Deflections For Network Level Analysis written by Régis Luis Carvalho and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Pavements categories.
Simplified Techniques For Evaluation And Interpretation Of Pavement Deflections For Network Level Analysis
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Author :
language : en
Publisher:
Release Date : 2012
Simplified Techniques For Evaluation And Interpretation Of Pavement Deflections For Network Level Analysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Pavements categories.
The objective of this study was to develop an approach for incorporating techniques to interpret and evaluate deflection data for network-level pavement management system (PMS) applications. The first part of this research focused on identifying and evaluating existing techniques, seeking out those that were simple, reliable, and easy to incorporate into current PMS practices, as well as those that produced consistent results. The second part of the research detailed the development of guidelines for the application of recommended techniques and procedures for determining optimum falling weight deflectometer (FWD) test spacing and data collection frequency. While there are many viable techniques available for evaluating the structural capacity of pavements that use FWD for project-level analysis, many of these techniques are time consuming and require an experienced analyst. As a result, using pavement deflection testing for network-level analysis has been limited to date. This guide provides information for the assessment of pavement structural performance for PMS applications. It reflects the general findings presented in the accompanying final report, Simplified Techniques for Evaluation and Interpretation of Pavement Deflections for Network-Level Analysis (FHWA-HRT-12-023).
Simplified Techniques For Evaluation And Interpretation Of Pavement Deflections For Network Level Analysis
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Author : Régis Luis Carvalho
language : en
Publisher:
Release Date : 2012
Simplified Techniques For Evaluation And Interpretation Of Pavement Deflections For Network Level Analysis written by Régis Luis Carvalho and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Pavements categories.
Simplified Deflection Based Probabilistic Technique For Network Level Pavement Analysis
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Author : Larry Wiser
language : en
Publisher:
Release Date : 2012
Simplified Deflection Based Probabilistic Technique For Network Level Pavement Analysis written by Larry Wiser and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Falling weight deflectometer categories.
The concept of a pavement management system (PMS) was developed following the successful AASHTO Road Test, in the 1950s, when pavement performance was characterized as "the necessary information to compare design alternatives and expectations over the service life of both flexible and rigid pavement structures." A link was established between performance and the activities of planning, designing, constructing, and maintaining pavements, and the concept of a "PMS" was defined accordingly. Currently, surface distress and roughness measurements are the main components in determining a pavement's existing condition in a PMS. The structural condition, although capable of providing important information on how the pavement will perform in the future (rate of deterioration, types and severity of expected distresses, etc.), is not widely used. Reasons for this lack of presence in a system-wide PMS are mostly related to time-consuming analyses and the need for an experienced analyst. This paper presents the development of simplified, deflection-based analytical techniques that provide rapid, automated screening of pavement's structural capacity for inclusion in a network-level PMS. The approach is based on stochastic-logistic modeling commonly used in reliability engineering. Data from the Long-Term Pavement Performance database was used to develop appropriate models, which relate the expected future performance to deflection-based parameters extracted analytically from falling weight deflectometer deflection basins and site-specific conditions such as climate and traffic. It is of paramount importance to consider the existing structural capacity of pavements together with pavement distresses in order to predict future pavement conditions more accurately and thus successfully fulfill the overall goals of the original concept of "pavement management.".
Transportation Research
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Author : Dharamveer Singh
language : en
Publisher: Springer Nature
Release Date : 2024-01-22
Transportation Research written by Dharamveer Singh and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-01-22 with Technology & Engineering categories.
This book is a collection of selected research papers from the 14th conference of the Transportation Planning and Implementation Methodologies for Developing Countries (TPMDC). It covers the broad area of transportation planning and policy, pavement design and engineering, emerging technologies in transportation, traffic management, operations, and safety, and sustainable mobility in transportation. The book aims to provide deeper understanding of the transportation issues, solutions, and learnings from the implemented solutions. This book will be of best interest for academicians, researchers, policy makers, and practitioners.
Bearing Capacity Of Roads Railways And Airfields
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Author : Andreas Loizos
language : en
Publisher: CRC Press
Release Date : 2017-07-20
Bearing Capacity Of Roads Railways And Airfields written by Andreas Loizos and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-07-20 with Technology & Engineering categories.
Bearing Capacity of Roads, Railways and Airfields includes the contributions to the 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields (BCRRA 2017, 28-30 June 2017, Athens, Greece). The papers cover aspects related to materials, laboratory testing, design, construction, maintenance and management systems of transport infrastructure, and focus on roads, railways and airfields. Additional aspects that concern new materials and characterization, alternative rehabilitation techniques, technological advances as well as pavement and railway track substructure sustainability are included. The contributions discuss new concepts and innovative solutions, and are concentrated but not limited on the following topics: · Unbound aggregate materials and soil properties · Bound materials characteritics, mechanical properties and testing · Effect of traffic loading · In-situ measurements techniques and monitoring · Structural evaluation · Pavement serviceability condition · Rehabilitation and maintenance issues · Geophysical assessment · Stabilization and reinforcement · Performance modeling · Environmental challenges · Life cycle assessment and sustainability Bearing Capacity of Roads, Railways and Airfields is essential reading for academics and professionals involved or interested in transport infrastructure systems, in particular roads, railways and airfields.
Network Level Testing For Pavement Structural Evaluation Using A Rolling Wheel Deflectometer
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Author : Daba S. Gedafa
language : en
Publisher:
Release Date : 2010
Network Level Testing For Pavement Structural Evaluation Using A Rolling Wheel Deflectometer written by Daba S. Gedafa and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Pavement temperature categories.
Structural evaluation can be very useful at the network level of pavement management for project prioritization purposes. However, due to expenses involved in data collection and analysis, pavements are not tested for structural capacity at the network level. Rolling wheel deflectometer (RWD), which measures surface deflections at highway speed, is an alternate, faster method of pavement deflection testing for network level data collection. This study was initiated to assess the feasibility of using RWD for network level pavement deflection measurements. RWD deflection data was collected under an 80-kN axle load and at about highway speed on non-interstate highways in northeast Kansas in July 2006. Falling-wheel deflectometer (FWD) data on these roads, collected from 1998 to 2006, were also used for comparison. The computed effective structural numbers from both FWD and RWD deflection data were compared. The results show that the deflections measured by RWD and the center (first sensor) deflections from FWD are statistically similar. The effective structural numbers computed from the FWD and RWD deflection measurements are also statistically similar. Thus RWD appears to be a valuable tool for structural capacity evaluation of pavements at the network level.
Network Level Pavement Deflection Testing And Structural Evaluation
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Author : M. Hossain
language : en
Publisher:
Release Date : 2000
Network Level Pavement Deflection Testing And Structural Evaluation written by M. Hossain and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Asphalt pavement categories.
Structural evaluation provides valuable information about the expected behavior of pavements and can be very useful at the network level of pavement management for project prioritization purposes. However, due to the expense involved in data collection and analysis, structural capacity is usually not determined at the network level. In Kansas, due to limited resources and the large size of the network (10 971 miles), annual network-level structural data collection at the same rate (five to ten tests per mile) as the project level is not realistic. This study was initiated to determine the sample size (% mileage) at the network level as well as the test intervals and frequency that can be used as guides for network-level deflection testing and structural evaluation of pavements.
Pavement Structural Evaluation At The Network Level
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Author : Gonzalo R. Rada
language : en
Publisher:
Release Date : 2016
Pavement Structural Evaluation At The Network Level written by Gonzalo R. Rada and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Pavements categories.
As State transportation departments consider structural adequacy as part of their routine pavement management system (PMS) activities by incorporating deflection testing, it is important to advance their practices from measuring deflection using falling weight deflectometers, which involves a slow, stop-and-go operation and requires lane closures, to a more viable alternative for network-level pavement management applications. The development of moving deflection testing devices that can measure pavement responses at traffic speeds represents this more viable alternative. The modern versions of the moving deflection testing devices that are actively used today include the Traffic Speed Deflectometer (TSD) and a Rolling Wheel Deflectometer (RWD). The goal of this project was to establish a reliable measure of the structural condition of bound pavement layers above the unbound base layer as it deteriorates over time under traffic and environmental loading based on moving pavement deflection technology measuring at traffic speeds. Moreover, this measure needed to be robust enough in capturing the structural condition or deterioration of the pavement layer notwithstanding the seasonal and spatial variation in base and subgrade layers. As part of the project, a literature review was conducted, and questionnaires were developed for device manufacturers, owners, and users, which were then followed up by interviews. Both the TSD and RWD were found to be potentially viable devices. Based on this finding, a work plan was developed and implemented to evaluate if the two devices met a minimum set of specifications related to the structural evaluation of pavements at the network level including accuracy and precision of deflection measurements, monitoring applied load, operating speed, and distance between deflection measurements. Field evaluations and validation analyses were completed in accordance with the work plan. Ultimately, analysis methodologies and processes were developed for incorporating pavement structural information within highway agencies' PMS applications.