Preparation of Joint Faulting Data for the Local Calibration of AASHTO Pavement Mechanistic–Empirical Design in Louisiana

2017 ◽  
Vol 2640 (1) ◽  
pp. 69-77
Author(s):  
Danny X. Xiao ◽  
Zhong Wu ◽  
Zhongjie Zhang
Keyword(s):  
High Speed ◽  
Lessons Learned ◽  
Pavement Management ◽  
Local Calibration ◽  
Pavement Management System ◽  
Measurement Results ◽  
The Common ◽  
Design Software ◽  
Longitudinal Profiles

Louisiana utilized performance data from the pavement management system (PMS) to evaluate and calibrate the AASHTO Pavement Mechanistic–Empirical (ME) Design. Analysis of the PMS faulting data revealed that there were no records between 0 and 0.2 in. (5 mm); others over 0.2 in. (5 mm) appeared to be much greater than would be expected based on engineering experience. Therefore, several tasks were completed to validate the PMS faulting data and prepare them for local calibration. This paper presents details of the problem, approach, results, and lessons learned. First, faulting data from the PMS and Long-Term Pavement Performance database were analyzed to have an overview of the common range of joint faulting. To validate the PMS faulting data, 43 representative projects across Louisiana were selected for further analysis. Longitudinal profiles were collected with high-speed profilers and analyzed with the AASHTO R36 automated faulting measurement (AFM) algorithms. Manual measurements were also conducted during site visits. The comparison of faulting from different methods showed that the PMS data extremely overestimated faulting compared with the AFM estimation or the manual measurement. Results from the AFM algorithm were much closer (in the same magnitude) to the manual measurements. Therefore, faulting data from the AFM algorithm were used, and the faulting model was successfully calibrated. It is recommended to evaluate PMS faulting data carefully before applying them to calibrate the AASHTO Pavement ME Design software. Automated faulting measurement based on high-speed profiles is a feasible approach.

Cyclic Approach to Airport Pavement Management Based on Non-Destructive Deflection Testing

2013 ◽  
Vol 723 ◽  
pp. 1019-1026
Author(s):  
Andrea Graziani ◽  
Andrea Grilli ◽  
Dania Miconi ◽  
Carlotta Godenzoni
Keyword(s):  
Pavement Management ◽  
Pavement Management System ◽  
Structural Evaluation ◽  
Airport Pavement ◽  
Pdca Cycle ◽  
Invaluable Tool ◽  
Deflection Test ◽  
Cyclic Approach ◽  
Non Destructive

The Authors describe the role of non-destructive deflection tests in Airport Pavement Management System (APMS) presenting the experience developed at an Italian Airport. An original approach to APMS implementation is illustrated, based on the PDCA cycle for quality control and continuous improvement of processes. An example application for the management of the runway pavement is described. Deflection test results obtained in four tests campaign carried out over a ten years period were globally analyzed to obtain pavement bearing capacity evolution and demonstrate the effectiveness of cyclic approach to pavement management. It is showed that structural evaluation can be an invaluable tool in pavement management and assist planning activities in the medium and long term.

scholarly journals Chronopolis Digital Preservation Network

2010 ◽  
Vol 5 (1) ◽  
pp. 119-133 ◽  
Author(s):  
David Minor ◽  
Don Sutton ◽  
Ardys Kozbial ◽  
Brad Westbrook ◽  
Michael Burek ◽  
...  
Keyword(s):  
Data Storage ◽  
High Speed ◽  
San Diego ◽  
Digital Preservation ◽  
Data Grid ◽  
Lessons Learned ◽  
First Year ◽  
Redundant Data ◽  
Wide Range

The Chronopolis Digital Preservation Initiative, one of the Library of Congress’ latest efforts to collect and preserve at-risk digital information, has completed its first year of service as a multi-member partnership to meet the archival needs of a wide range of domains.Chronopolis is a digital preservation data grid framework developed by the San Diego Supercomputer Center (SDSC) at UC San Diego, the UC San Diego Libraries (UCSDL), and their partners at the National Center for Atmospheric Research (NCAR) in Colorado and the University of Maryland's Institute for Advanced Computer Studies (UMIACS).Chronopolis addresses a critical problem by providing a comprehensive model for the cyberinfrastructure of collection management, in which preserved intellectual capital is easily accessible, and research results, education material, and new knowledge can be incorporated smoothly over the long term. Integrating digital library, data grid, and persistent archive technologies, Chronopolis has created trusted environments that span academic institutions and research projects, with the goal of long-term digital preservation.A key goal of the Chronopolis project is to provide cross-domain collection sharing for long-term preservation. Using existing high-speed educational and research networks and mass-scale storage infrastructure investments, the partnership is leveraging the data storage capabilities at SDSC, NCAR, and UMIACS to provide a preservation data grid that emphasizes heterogeneous and highly redundant data storage systems.In this paper we will explore the major themes within Chronopolis, including:a) The philosophy and theory behind a nationally federated data grid for preservation. b) The core tools and technologies used in Chronopolis. c) The metadata schema that is being developed within Chronopolis for all of the data elements. d) Lessons learned from the first year of the project.e) Next steps in digital preservation using Chronopolis: how we plan to strengthen and broaden our network with enhanced services and new customers.

Morphology of the Chip Formation at Orthogonal High Speed Milling of AISI H13

2016 ◽  
Vol 686 ◽  
pp. 45-50 ◽  
Author(s):  
Jan Řehoř ◽  
Jaroslava Fulemová ◽  
Katarína Monková ◽  
Peter Monka
Keyword(s):  
Chip Formation ◽  
High Speed ◽  
Cutting Temperature ◽  
Evaluation Process ◽  
Machining Process ◽  
High Speed Cutting ◽  
Analysis And Evaluation ◽  
Measurement Results ◽  
Aisi H13

High-speed cutting (HSC) or high-speed machining (HSM) is an issue that the scientists deals with in long-term. To demonstrate the explicitness, that a full HSC machining process is considered, it is necessary to monitor the series of factors. In particular, the process of chip formation, cutting forces, cutting temperature, vibration, tool life and surface finish quality in relation to the method of machining, machined material and its properties. The article deals with the detailed analysis and evaluation of the chip formation in order to determine the hard area, transition area and veritable HSC machining. The evaluation process is based on the proposed experimental model, which is confronted with the measurement results.

Validation Protocol for a Pavement Management System

2018 ◽  
Vol 2672 (44) ◽  
pp. 32-42
Author(s):  
Theunis F. P. Henning ◽  
Elke Beca ◽  
Gordon Hart
Keyword(s):  
Asset Management ◽  
Pavement Management ◽  
Evolutionary Development ◽  
Investment Planning ◽  
Pavement Management System ◽  
Number Of Factors ◽  
Pavement Management Systems ◽  
The Status ◽  
Long Term Forecasting

Being able to undertake more efficient maintenance and renewal planning of road networks has seen a number of pavement management systems (PMS) being developed between the 80s to mid-90s. During the initial years, there was a significant focus on substantiating the need and demonstrating the benefits of using these tools to assist in the investment planning for roads. Today, with substantial experience, and legislative support such as MAP-21 and PASS-55, the use of PMS in the asset management cycle of roads is a given. The challenge these days is to effectively use these tools and ensure robust outcomes are achieved from the overall PMS process. The success of any PMS is determined by a number of factors including having skilled resources, institutional support, and legislative and funding drivers demanding evidence-based forecasted investment needs. Asset managers also realize the importance of having technical robustness in the process to ensure likely outcomes. This paper documents the evolutionary development pathway of the New Zealand PMS that has now been in use across the entire country for more than 18 years. It shows how by always challenging the status quo it has resulted in consistently increasing the overall robustness of the system. In particular, it shows how different validation techniques have been used to improve the practicality and appropriateness of long-term forecasting capabilities.

Implementation of Automated Network-Level Crack Detection Processes in Maryland

2003 ◽  
Vol 1860 (1) ◽  
pp. 109-116 ◽  
Author(s):  
Jonathan L. Groeger ◽  
Peter Stephanos ◽  
Paul Dorsey ◽  
Mark Chapman
Keyword(s):  
Data Collection ◽  
Crack Detection ◽  
Implementation Process ◽  
Lessons Learned ◽  
Pavement Management ◽  
Pavement Management System ◽  
State Highway ◽  
Management Group ◽  
Detection Software ◽  
Insight Into

The Maryland State Highway Administration (MDSHA) has collected cracking data on its roadways for use in its pavement management system since 1984. Through much of this history the pavement cracking survey was performed yearly by teams of inspectors riding in vans. With the reengineering of the administration over the years, this process began to present serious resource and logistical problems. During the past 3 years, the MDSHA pavement management group has developed and implemented a state-of-the-art automated network-level crack detection process that is showing promising results. This process is based upon the use of the automated road analyzer (ARAN) data collection vehicle, Wisecrax crack detection software, and an intensive quality-control (QC) and quality-assurance (QA) procedure. The data collection and data processing tasks are all performed in house with MDSHA resources. An overview of the processes developed and implemented by MDSHA to conduct these surveys is provided. Also discussed are challenges and lessons learned during the implementation process. Presentation of this information will allow others to gain insight into the strengths and weaknesses of adopting such a system and promote information sharing among pavement data collection organizations. Overall, it is concluded that automated network-level crack detection is a workable and efficient tool. However, a strict QC-QA regime must be instituted in order to achieve consistent and repeatable results.

Roads Problems on Undermined Areas in the Moravian-Silesian Region

2014 ◽  
Vol 505-506 ◽  
pp. 477-480
Author(s):  
Denisa Cihlářová ◽  
Tomáš Seidler ◽  
Miloslav Řezáč
Keyword(s):  
Management System ◽  
Pavement Management ◽  
Pavement Management System ◽  
Comprehensive Knowledge ◽  
Quality Life ◽  
Strongly Connected ◽  
Undermined Area ◽  
Long Term Observation

Quality life and prosperous district is strongly connected with quality functional road infrastructure. One of the tools that can help is Pavement Management System. Pavement management system used in undermined area must take into account different degradation factors, which affecting disturbances on the roads. It is difficult to choose sufficient technology for its repair. Chosen repair should be from the economical and technological aspect as effective. This article refers to the gaps in the current pavement management system when its use in such affected areas. According to the long-term observation was made classification of roads disturbances and design of their repairs. This contributes significantly to obtain comprehensive knowledge of interactions between soil and road elements.

Pavement texture from high-speed laser for pavement management system

2013 ◽  
Vol 14 (8) ◽  
pp. 697-705 ◽  
Author(s):  
Jay N. Meegoda ◽  
Shengyan Gao ◽  
Sim Liu ◽  
Nicholas C. Gephart
Keyword(s):  
Management System ◽  
High Speed ◽  
Pavement Management ◽  
Pavement Management System

scholarly journals The Skid Resistance Evaluation on the Longterm Monitored Road Sections

2014 ◽  
Vol 10 (2) ◽  
pp. 66-72
Author(s):  
Peter Kotek ◽  
Matúš Kováč ◽  
Martin Decký
Keyword(s):  
Surface Characteristics ◽  
Pavement Management ◽  
Point Of View ◽  
Traffic Load ◽  
Skid Resistance ◽  
Pavement Management System ◽  
Test Conditions ◽  
Measured Speed

Abstract The article deals with the analysis of the skid resistance results measured at the long-term monitored road sections in Slovakia in perspective of the possibility of the deterioration functions determination for the purposes of the pavement management system. There were 11 road sections evaluated, on which have been surface characteristics measured since 1998. The focus was on the evaluation of the longitudinal friction coefficient Mu measured by device Skiddometer BV11, which is the property of the Slovak Road Administration. Beside the Mu parameter, the test conditions were observed and evaluated, as well (measured speed, air and surface temperature, type of asphalts of the wearing course, traffic load, and the season (spring, autumn, respectively) in which the skid resistance measurements were performed. In conclusion, there was reviewed a presumption of the possibility to determine a deterioration functions for skid resistance in point of view the quality of the data, which have been collected on the Slovak long-term monitored road sections.

Analysis by High-Speed Profile of Jointed Concrete Pavement Slab Curvatures

2000 ◽  
Vol 1730 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Christopher R. Byrum
Keyword(s):  
High Speed ◽  
Profile Analysis ◽  
Concrete Pavement ◽  
Pavement Management ◽  
Pavement Performance ◽  
Analysis Method ◽  
Pavement Rehabilitation ◽  
Curvature Index ◽  
Jointed Concrete Pavement

A high-speed pavement profile analysis method that detects curvature present in the wheelpaths of jointed concrete pavement slabs is presented. This technique can be used to analyze slab curvatures present in pavements and caused by curling and warping forces. The FHWA Long-Term Pavement Performance (LTPP) program has obtained high-speed elevation profiles for the jointed concrete pavements in the study. This profile analysis method reads an LTPP profile and detects imperfections in the road curvature profile, which typically are joints and cracks. It then analyzes the slab regions (intact slab segments) between these numerical imperfections for the presence of curvature. The result of a profile analysis is a road profile index—the curvature index—which represents the average slab curvature present along the wheelpaths for the profile. This profile analysis method was applied to more than 1,100 LTPP GPS3 profiles. The range of the slab curvatures encountered is described, and some key factors related to apparent locked-in curvatures (related to warping and construction) are discussed. The amount of locked-in curvature in slabs significantly affects slab behavior and long-term pavement performance. Curvature information should be available to pavement rehabilitation engineers making fix type and funding decisions for pavements. This new analysis method could be implemented rapidly in routine pavement profile analysis and pavement management systems.

Maximizing Outcomes in Group Treatment of Aphasia: Lessons Learned From a Community-Based Center

2014 ◽  
Vol 24 (3) ◽  
pp. 100-105 ◽  
Author(s):  
Darlene Williamson
Keyword(s):  
Group Treatment ◽  
Treatment Protocol ◽  
Lessons Learned ◽  
Group Program ◽  
Community Based ◽  
Multiple Treatment ◽  
Use Of Technology ◽  
Communication Impairments ◽  
Treatment Settings

Given the potential of long term intervention to positively influence speech/language and psychosocial domains, a treatment protocol was developed at the Stroke Comeback Center which addresses communication impairments arising from chronic aphasia. This article presents the details of this program including the group purposes and principles, the use of technology in groups, and the applicability of a group program across multiple treatment settings.

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