Download or read book LTBP Program s Literature Review on Weigh in motion Systems written by Imad Al-Qadi and published by . This book was released on 2016 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Truck size and weight are regulated using Federal and State legislation and policies to ensure safety and preserve bridge and high infrastructure. Weigh-in-motion (WIM) systems can capture the weight and other defining characteristics of the vehicles actually using the Nation's highways, providing important loading-related data that is essential for evaluating the performance of transportation infrastructure. As part of the Federal Highway Administration's (FHWA) Long-Term Bridge Performance (LTBP) Program's Technical Assistance Contract, a literature review of the state of the practice was performed for WIM systems installed in pavements and on bridges. This literature review focused on the development of WIM systems, concepts for measuring axle loads, the applications of WIM sensors for pavements, and recent advancements in bridge WIM system. This review covers the types, installation, calibration, operations, accuracy, efficiency, effectiveness, and durability of WIM systems, in addition to current Federal and State truck load regulations. This review facilitates selection of the appropriate WIM technology systems for consideration and use to address LTBP Program needs. This literature review serves as a reference document for Pooled Fund Project Number TPF-5(283), The Influence of Vehicular Live Loads on Bridge Performance, which targets the impact of vehicle live loads on bridge component durability.
Download or read book Evaluation of Weigh in motion Systems written by Benjamin H. Cottrell and published by . This book was released on 1992 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research was to evaluate low cost weigh-in-motion systems. The three systems evaluated were (1) a capacitance weigh mat system, (2) a bridge weighing system, and (3) a piezoelectric cable sensor system. All three systems have a two-lane capability. An evaluation was made of (1) the quality of the data, (2) the performance of the equipment, (3) the applications of the equipment and its ease ofuse, and (4) the format of the data and its usefulness. Although objective data were used when possible, the majority of the evaluation is subjective. The quality of the data from each of the three systems is about the same. The piezoelectric cable system provides slightly lower quality data than the other two systems. The equipment of the capacitance weigh mat performed well; that of the bridge system was adequate; and there was concern about the durability of the piezoelectric cable system. Because of the tradeoffs between the capacitance weigh mat system and the bridge system, it is difficult to rank them. The piezoelectric cable system's sensors are permanently installed; therefore, it is not as portable as the other two systems. With regard to the format of the data and its usefulness (which are dependent mostly on the software and not the sensors), the capacitance weigh mat system is flexible and provides individual truck records in two formats, the bridge system provides the most comprehensive tables, and the piezoelectric cable system is limited and depends on other software to generate additional tables. Suggestions are made about how to use the systems and how to improve their performance.
Download or read book Use of Weigh in motion Systems for Data Collection and Enforcement written by Wiley D. Cunagin and published by . This book was released on 1986 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This synthesis will be of interest to planners, pavement designers, administrators, and others interested in knowing the actual weights of vehicles using the highways. Information is presented on current uses of weigh-in-motion systems that can obtain the data needed to properly plan and design highways."--Avant-propos.
Download or read book A Contribution to Moving Force Identification in Bridge Dynamics written by Andrei Firus and published by Springer Nature. This book was released on 2023-03-17 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: The knowledge of the real forces acting on a structure are of great importance in the condition assessment process of existing structures. In this sense, this work provides a novel approach for identification of dynamic moving forces acting on a bridge structure. It seeks to find the optimal time dependent force values that minimize the difference between the computed and measured displacement and acceleration time histories for a limited number of sensor locations. The work also presents extensive experimental investigations of the developed method on real structures in operation, which consistently show that it can be successfully used on a wide range of applications: from small structures excited by rather low pedestrian forces up to the "heavy category" of a complete train passing a railway bridge. In this context, a set of particularities and limitations arising in the practical application of the method on real structures are also discussed.
Download or read book Bridge Traffic Loading written by Eugene OBrien and published by CRC Press. This book was released on 2021-12-03 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is considerable uncertainty about what level of traffic loading bridges should be designed for. Codes specify notional load models, generally to represent extreme levels of normal traffic, but these are often crude and have inconsistent levels of safety for different load effects. Over the past few decades, increasing quantities of reliable truck weight data has become available and it is now possible to calculate appropriate levels of bridge traffic loading, both for specific bridges and for a road network. Bridge Traffic Loading brings together experts from all over the world to deliver not just the state-of-the-art of vertical loading, but also to provide recommendations of best-practice for all the major challenges in the field – short-span, single and multi-lane bridge loading, dynamic allowance and long-span bridges. It reviews issues that continue to be debated, such as which statistical distribution is most appropriate, whether free-flowing or congested traffic governs and dealing with future traffic growth. Specialist consultants and bridge owners should find this invaluable, as will regulators.
Download or read book High Speed Weigh in motion System Calibration Practices written by National Cooperative Highway Research Program (Etats-Unis) and published by . This book was released on 2008 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On site Evaluation and Calibration Procedures for Weigh in motion Systems written by and published by . This book was released on 1996 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of Weigh in motion Data for Pavement Bridge Weight Enforcement and Freight Logistics Applications written by Darren G. Hazlett and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most U.S. state departments of transportation (DOTs) are collecting weigh-in-motion data with a wide variety of sensor types and using them in a variety of applications. Many agencies use WIM data to aid in pavement design, although most are not currently using a Pavement ME (mechanistic-empirical) Design application. WIM for bridge and asset management purposes is used much less often. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 546: Use of Weigh-in-Motion Data for Pavement, Bridge, Weight Enforcement, and Freight Logistics Applications documents how DOTs incorporate weigh-in-motion data into such applications as bridge and pavement design and management, load ratings, weight enforcement support, and freight planning and logistics.
Download or read book Comparison of Weight Data Collected at Weigh in motion WIM Systems Located on the Same Route written by Curtis Dahlin and published by . This book was released on 1994 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Innovative Bridge Design Handbook written by Alessio Pipinato and published by Butterworth-Heinemann. This book was released on 2015-11-11 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: As known, each bridge presents a unique set of design, construction, and maintenance challenges. The designer must determine the appropriate methods and level of refinement necessary to design and analyze each bridge on a case-by-case basis. The Innovative Bridge Design Handbook: Construction, Rehabilitation, and Maintenance encompasses the state of the art in bridge design, construction, maintenance, and safety assessment. Written by an international group of experts, this book provides innovative design approaches used in various parts of the world and explores concepts in design, construction, and maintenance that will reduce project costs and increase structural safety and durability. Furthermore, research and innovative solutions are described throughout chapters. The Innovative Bridge Design Handbook: Construction, Rehabilitation, and Maintenance brings together the specific knowledge of a bevy of experts and academics in bridge engineering in the areas of design, assessment, research, and construction. The handbook begins with an analysis of the history and development of bridge aesthetics and design; various types of loads including seismic and wind loads are then described, together with fatigue and fracture. Bridge design based on material such as reinforced concrete, prestressed reinforced concrete, steel and composite, timber, masonry bridges is analyzed and detailed according to international codes and standards. Then bridge design based on geometry, such as arch bridges, girders, cable stayed and suspension bridges, is illustrated. This is followed by a discussion of a number of special topics, including integral, movable, highway and railway bridges, together with seismic component devices, cables, orthotropic decks, foundations, and case studies. Finally, bridge construction equipment, bridge assessment retrofit and management, bridge monitoring, fiber-reinforced polymers to reinforce bridges, bridge collapse issues are covered. Loads including seismic and wind loads, fatigue and fracture, local effects Structural analysis including numerical methods (FEM), dynamics, risk and reliability, innovative structural typologies Bridge design based on material type: RC and PRC, steel and composite, timber and masonry bridges Bridge design based on geometry: arch bridges, girders, cable stayed and suspension bridges Special topics: integral, movable, highway, railway bridges, seismic component devices, cables, orthotropic decks, foundations Construction including construction case studies, construction equipment, bridge assessment, bridge management, retrofit and strengthening, monitoring procedures
Download or read book Proceedings of the 1st Conference of the European Association on Quality Control of Bridges and Structures written by Carlo Pellegrino and published by Springer Nature. This book was released on 2021-12-11 with total page 1454 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the latest advances and innovations in the field of quality control and improvement of bridges and structures, as presented by international researchers and engineers at the 1st Conference of the European Association on Quality Control of Bridges and Structures (EUROSTRUCT 2021), held in Padua, Italy on August 29 – September 1, 2021. Contributions include a wide range of topics such as testing and advanced diagnostic techniques for damage detection; SHM and AI, IoT and machine learning for data analysis of bridges and structures; fiberoptics and smart sensors for long-term SHM; structural reliability, risk, robustness, redundancy and resilience for bridges; corrosion models, fatigue analysis and impact of hazards on infrastructure components; bridge and asset management systems, and decision-making models; Life-Cycle Analysis, retrofit and service-life extension, risk management protocols; quality control plans, sustainability and green materials.
Download or read book The Facility Management Handbook written by Kathy Roper and published by AMACOM. This book was released on 2014-07-23 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: The wide-ranging umbrella of facility management covers everything from technology systems to disaster recover planning to zoning compliance…and that’s just getting started. Facilities management is a multidisciplinary function that requires a deep knowledge of the entire business and physical planning cycle. Undoubtedly, the sheer scope of duties requires a far-reaching reference for staying abreast of the latest innovations and best practices. The Facility Management Handbook is the answer. This guide shares insightful overviews, case studies, and practical guidelines that pave the way for successful planning, budgeting, real estate transactions, construction, emergency preparedness, security, operations, maintenance, and more. The thoroughly revised fourth edition examines cutting-edge technologies and includes new information on: Building Information Modeling (BIM) Contracting and project management methods FASB and IASB requirements Distributed working Sustainability reporting and more The Facility Management Handbook is the one-stop resource every facility manager must have to master a broad scope of duties while staying current on innovations and best practices.
Download or read book Differentiation of Embryonic Stem Cells written by and published by Elsevier. This book was released on 2003-12-18 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume covers all aspects of embryonic stem cell differentiation, including mouse embryonic stem cells, mouse embryonic germ cells, monkey and human embryonic stem cells, and gene discovery. * Early commitment steps and generation of chimeric mice* Differentiation to mesoderm derivatives* Gene discovery by manipulation of mouse embryonic stem cells
Download or read book The Facility Manager s Guide to Finance and Budgeting written by David G. Cotts and published by Amacom Books. This book was released on 2004 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher Fact Sheet The first primer to teach facility managers financial skills that will help them sell their department to senior management, win funds for crucial projects, & to become fully integrated into an organization.
Download or read book Innovative Bridge Design Handbook written by Alessio Pipinato and published by Elsevier. This book was released on 2021-09-08 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovative Bridge Design Handbook: Construction, Rehabilitation, and Maintenance, Second Edition, brings together the essentials of bridge engineering across design, assessment, research and construction. Written by an international group of experts, each chapter is divided into two parts: the first covers design issues, while the second presents current research into the innovative design approaches used across the world. This new edition includes new topics such as foot bridges, new materials in bridge engineering and soil-foundation structure interaction. All chapters have been updated to include the latest concepts in design, construction, and maintenance to reduce project cost, increase structural safety, and maximize durability. Code and standard references have been updated. Completely revised and updated with the latest in bridge engineering and design Provides detailed design procedures for specific bridges with solved examples Presents structural analysis including numerical methods (FEM), dynamics, risk and reliability, and innovative structural typologies
Download or read book Advances in Unmanned Aerial Vehicles written by Kimon P. Valavanis and published by Springer Science & Business Media. This book was released on 2008-02-26 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past decade has seen tremendous interest in the production and refinement of unmanned aerial vehicles, both fixed-wing, such as airplanes and rotary-wing, such as helicopters and vertical takeoff and landing vehicles. This book provides a diversified survey of research and development on small and miniature unmanned aerial vehicles of both fixed and rotary wing designs. From historical background to proposed new applications, this is the most comprehensive reference yet.
Download or read book The Human Placenta written by C. Redman and published by Wiley-Blackwell. This book was released on 1993-01-18 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: The placenta is fascinating and complex. Basically foreign to the maternal body, it can be thought of as an organ transplanted onto the mother's host tissue. As such it embodies all the principles of tissue acceptance and rejection. Many of the risks of pregnancy and labor have now been eliminated and the placenta is likely to be at the root of many of the dangers to the unborn child that remain. A breakdown of the relationship between the placenta and the maternal tissue may turn out to be the cause of the majority of early lost pregnancies.
