Development of FWD Procedures Manual PDF Download

Author: Nenad Gucunski
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 162

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Author: Armelle Chabot
Publisher: Springer
ISBN: 9402408673
Category : Technology & Engineering
Languages : en
Pages : 735

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This book presents the latest advances in research to analyze mechanical damage and its detection in multilayer systems. The contents are linked to the Rilem TC241 - MCD scientific activities and the proceedings of the 8th RILEM International Conference on Mechanisms of Cracking and Debonding in Pavements (MCD2016). MCD2016 was hosted by Ifsttar and took place in Nantes, France, on June 7-9, 2016. In their lifetime, pavements undergo degradation due to different mechanisms of which cracking is among the most important ones. The damage and the fracture behavior of all its material layers as well as interfaces must be understood. In that field, the research activities aims to develop a deeper fundamental understanding of the mechanisms responsible for cracking and debonding in asphalt concrete and composite (e.g. asphalt overlays placed on PCC or thin cement concrete overlay placed on asphalt layer) pavement systems.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 174

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Author: Fritz J. Jooste
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 284

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The Texas Department of Transportation (TXDOT) receives about 75 to 100 permit requests for superheavy load moves annually. Most of the moves take place in the southeast region of the state due to the proximity to the Gulf of Mexico and the presence of navigational inland waterways. Gross vehicle weights associated with these moves range from 1112 kN to over 8896 kN and include loads like dragline components, off-shore pipe-laying equipment, oil pressure veseels, and electric transformers. The number of superheavy load permit applications has increased over the years. Before a permit can be issued, TxDOT needs to determine whether the proposed route is structurally adequate to sustain the superheavy load. The analysis of damage potential under superheavy loads concerns the likelihood of a rapid, load-induced shear failure as opposed to the long-term accumulation of permanent deformation and fatigue due to repeated load applications. In this project, researchers developed a procedure for evaluating the potential for pavement damage prior to a superheavy load move based on the Mohr-Coulomb yield criterion. In developing this procedure, researchers investigated the sensitivity of the Mohr-Coulomb yield criterion to changes in the predicted stress state and material strength parameters; compared different models for evaluating pavement response under vehicle loading; and investigated the effect of different load configurations on the predicted pavement response and yield function value. Using the results from these investigations, researchers developed a two-stage procedure for the structural assessment of superheavy load routes which utilizes existing capabilities within TxDOT. Flexibility is provided to conduct structural evaluations with varying degrees of complexity depending on the quantity and quality of information available on the proposed superheavy load route. In the first stage, structural adequacy is evaluated by means of charts with minimal requirements for materials characterization. Relationships are provided for estimating resilient and strength parameters of base and subgrade materials from results of simple soil tests. Should the initial results indicate that the structure is inadequate to accommodate the expected superheavy load, then the second stage analysis should be conducted which requires a more detailed characterization of the proposed route. In this stage, the evaluation uses an incremental non-linear layered elastic computer program. This report documents the development of the methodology for permitting superheavy load moves.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 168

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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1196

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Author: American Association of State Highway and Transportation Officials
Publisher: AASHTO
ISBN: 1560510552
Category : Pavements
Languages : en
Pages : 622

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Design 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: Institution of Civil Engineers (Great Britain)
Publisher: Thomas Telford
ISBN: 9780727716354
Category : Technology & Engineering
Languages : en
Pages : 468

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The level of research activity in the highway sector as a whole has declined precipitously in recent decades, whilst the challenges facing US state highway agencies have escalated. As a result, a Strategic Highway Research Program - SHRP) was initiated to establish collaboration with research bodies tackling similar highway problems in countries worldwide. This collection of reports from around the world presents SHRP`s progress towards providing research-based new products from which the international highway engineering community may benefit. SHRP concentrates on six high-priority research areas: asphaltic materials; pavement performance; cement and concrete; maintenance cost effectiveness; concrete bridge component protection systems and the chemical control of snow and ice.

Author: Yi Zhang
Publisher: John Wiley & Sons
ISBN: 1118964810
Category : Technology & Engineering
Languages : en
Pages : 452

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Provides technical details and developments for all automotive power transmission systems The transmission system of an automotive vehicle is the key to the dynamic performance, drivability and comfort, and fuel economy. Modern advanced transmission systems are the combination of mechanical, electrical and electronic subsystems. The development of transmission products requires the synergy of multi-disciplinary expertise in mechanical engineering, electrical engineering, and electronic and software engineering. Automotive Power Transmission Systems comprehensively covers various types of power transmission systems of ground vehicles, including conventional automobiles driven by internal combustion engines, and electric and hybrid vehicles. The book covers the technical aspects of design, analysis and control for manual transmissions, automatic transmission, CVTs, dual clutch transmissions, electric drives, and hybrid power systems. It not only presents the technical details of key transmission components, but also covers the system integration for dynamic analysis and control. Key features: Covers conventional automobiles as well as electric and hybrid vehicles. Covers aspects of design, analysis and control. Includes the most recent developments in the field of automotive power transmission systems. The book is essential reading for researchers and practitioners in automotive, mechanical and electrical engineering.

Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 2044

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