Sensor Installation for the Local Calibration of the Mechanistic Empirical Pavement Design Guide in New Hampshire
Author: Matthew L. Steele
Publisher:
Published: 2010
Total Pages: 248
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author: Matthew L. Steele
Publisher:
Published: 2010
Total Pages: 248
ISBN-13:
DOWNLOAD EBOOKAuthor: Feng Hong
Publisher:
Published: 2009
Total Pages: 9
ISBN-13:
DOWNLOAD EBOOKOne of the challenges to the implementation of the mechanistic-empirical pavement design guide (MEPDG) comes from calibrating the transfer functions. This paper focuses on calibration of one of the major distress models in flexible pavement: permanent deformation or rutting. Two key aspects are critical to a successful rutting model calibration: data and method. Regarding the data, existing in-field information only provides total rut depth, which could not meet the requirement of permanent deformation in each structural layer by the MEPDG. Concerning the method, existing work either fails to address calibration factors from a holistic perspective by only focusing on individual sections separately or ignores variability inherent in those factors. In this study, layer-wise permanent deformation from instrumented pavement under accelerated pavement testing serves to accommodate the models calibration. A systematic calibration procedure is established, which globally optimizes all available information across all test sections. Through simulation and numerical optimization, optimal calibration shift factors for three typical flexible pavement materials, asphalt mixture, unbound granular base, and finegrain soil are obtained as 0.60, 0.49, and 0.84, respectively. This implies that the uncalibrated MEPDG is biased toward overprediction of rut depth. It is further suggested that a more rational result for each calibrated factor is to introduce an appropriate distribution to characterize its uncaptured variability. In addition, a case study involving using calibrated MEPDG to predict pavement performance or life indicates that (1) model calibration has a significant impact on the prediction and (2) the "fourth power law" is supported by the MEPDG.
Author: James A. Crovetti
Publisher:
Published: 2012
Total Pages: 110
ISBN-13:
DOWNLOAD EBOOKAuthor: American Association of State Highway and Transportation Officials
Publisher: AASHTO
Published: 1993
Total Pages: 622
ISBN-13: 1560510552
DOWNLOAD EBOOKDesign related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.
Author:
Publisher:
Published: 2006
Total Pages: 326
ISBN-13: 9780965231091
DOWNLOAD EBOOKManual of integrated material and construction practices for concrete pavements.
Author: Shiraz D. Tayabji
Publisher:
Published: 2013
Total Pages: 184
ISBN-13:
DOWNLOAD EBOOK"TRB's second Strategic Highway Research Program (SHRP 2) Report S2-R05-RR-1: Precast Concrete Pavement Technology reviews the available precast concrete pavement (PCP) systems; summarizes PCP applications; and offers suggested guidelines for the design, fabrication, installation, and selection of PCP systems. " -- Publisher's description.
Author: E. J. Yoder
Publisher: John Wiley & Sons
Published: 1991-01-08
Total Pages: 732
ISBN-13: 9780471977803
DOWNLOAD EBOOKPresents a complete coverage of all aspects of the theory and practice of pavement design including the latest concepts.
Author: Babin, Marcel
Publisher: UNESCO
Published: 2008-06-05
Total Pages: 880
ISBN-13: 9231040421
DOWNLOAD EBOOKThe proliferation of harmful phytoplankton in marine ecosystems can cause massive fish kills, contaminate seafood with toxins, impact local and regional economies and dramatically affect ecological balance. Real-time observations are essential for effective short-term operational forecasting, but observation and modelling systems are still being developed. This volume provides guidance for developing real-time and near real-time sensing systems for observing and predicting plankton dynamics, including harmful algal blooms, in coastal waters. The underlying theory is explained and current trends in research and monitoring are discussed.Topics covered include: coastal ecosystems and dynamics of harmful algal blooms; theory and practical applications of in situ and remotely sensed optical detection of microalgal distributions and composition; theory and practical applications of in situ biological and chemical sensors for targeted species and toxin detection; integrated observing systems and platforms for detection; diagnostic and predictive modelling of ecosystems and harmful algal blooms, including data assimilation techniques; observational needs for the public and government; and future directions for research and operations.
Author: M. Rashad Islam
Publisher: McGraw Hill Professional
Published: 2021-02-05
Total Pages: 576
ISBN-13: 126045892X
DOWNLOAD EBOOKMaster the principles, analysis, and design in pavement engineering This student-friendly textbook offers comprehensive coverage of pavement design and highways. Written by two seasoned civil engineering educators, the book contains precise explanations of traditional and computerized mechanistic design methods along with detailed examples of real-world pavement and highway projects. Pavement Design: Materials, Analysis, and Highways shows, step by step, how to apply the latest, software-based AASHTOWare Pavement Mechanistic-Empirical Design method. Each design topic is covered in separate, modular chapters, enabling you to tailor a course of study. Fundamentals of Engineering (FE) sample questions are also provided in each chapter. Coverage includes: Stress-strain in pavement Soils, aggregates, asphalt, and portland cement concrete Traffic analysis for pavement design Distresses and distress-prediction models in flexible and rigid pavement Flexible and rigid pavement design by AASHTO 1993 and AASHTOWare Overlay and drainage design Sustainable and rehabilitation pavement design, pavement management, and recycling Geometric design of highways
Author: National Research Council
Publisher: National Academies Press
Published: 2009-03-17
Total Pages: 611
ISBN-13: 0309125391
DOWNLOAD EBOOKThe rapid conversion of land to urban and suburban areas has profoundly altered how water flows during and following storm events, putting higher volumes of water and more pollutants into the nation's rivers, lakes, and estuaries. These changes have degraded water quality and habitat in virtually every urban stream system. The Clean Water Act regulatory framework for addressing sewage and industrial wastes is not well suited to the more difficult problem of stormwater discharges. This book calls for an entirely new permitting structure that would put authority and accountability for stormwater discharges at the municipal level. A number of additional actions, such as conserving natural areas, reducing hard surface cover (e.g., roads and parking lots), and retrofitting urban areas with features that hold and treat stormwater, are recommended.