Download or read book Next generation Wireless Bridge Weigh in motion WIM System Integrated with Nondestructive Evaluation NDE Capability for Transportation Infrastructure Safety written by Yang Wang (Writer on structural engineering) and published by . This book was released on 2014 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Next generation Wireless Bridge Weigh in motion WIM System Integrated with Nondestructive Evaluation NDE Capability for Transportation Infrastructure Safety written by Yang Wang (Writer on structural engineering) and published by . This book was released on 2014 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simulation of Bridge Weigh in Motion System Integrated with Bridge Safety written by Zhisong Zhao and published by . This book was released on 2012 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge weigh-in-motion system (B-WIM) testing is a popular technology in bridge applications. The B-WIM system can track extensive information about loading conditions to which bridges are subjected, and engineers can evaluate the responses of bridges and assess their performance relative to the safety index and serviceability. FAD (Free-of-Axle-Detector) or NOR (Nothing-On-Road) B-WIM system works well, but only if the system detects axle locations. In the USA, there are challenges for some beam-and-slab bridges. In the first manuscript, we describe a study with alternative strategies for sensor types and sensor installation locations for beam-and-slab bridges. The sensor layouts are identified and two new sensors are investigated. Most of the commercially available B-WIM systems are based on an algorithm developed by Moses (1979). The performance of this method is acceptable for estimating gross vehicle weight (GVW), but it can be unsatisfactory for estimating single axle loads. In order to improve the accuracy to an acceptable level, two algorithms are proposed. The second and third manuscripts present the measurement of axle weights and GVWs of moving heavy vehicles based on these algorithms. As determined in a case study of a bridge on US-78, both algorithms significantly improved the accuracy of measurements of axle weights in comparison with the commercial B-WIM system. Existing bridges may be functionally obsolete or have deficient structures based on older design codes or features. These bridges are not unsafe for normal vehicle traffic, but they can be vulnerable to specific traffic conditions. We propose, in manuscript 4, use of a simulation model based on B-WIM experimental data derived during extreme events. The results provide an improved understanding of the possible deficiencies of this bridge, and an appropriate retrofit is suggested. Finally, the dynamic amplification factor (DAF) is a significant parameter for design new of bridges and for evaluation of existing bridges. AASHTO guidelines provided very conservative values. So, improved methods for determination of DAF values need to be developed to evaluate the safety of existing bridges. This manuscript presents a simulation method to evaluate the DAF of existing bridges by use of the B-WIM data. The accurate results are obtained based on site-specific data.

Download or read book Non destructive Testing of Wisconsin Highway Bridges written by Alireza Ghorbanpoor and published by . This book was released on 2005 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of the Bridge Weigh in motion System written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of a Bridge Weigh in Motion System written by Arturo Gonzalez and published by LAP Lambert Academic Publishing. This book was released on 2010-05 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Weigh-in-Motion (WIM) data can be used to predict future traffic volumes and weights for the planning of new infrastructure, the management of maintenance activities, the identification/reduction of overloading problems and the evaluation of the performance of pavements and bridges. Most WIM systems are based on sensors placed in or on the pavement that measure the wheel force applied over them during a very short time. The value of this force varies as a result of road roughness and vehicle dynamics leading to limited accuracy for estimating static weights. Additionally, these systems experience durability problems due to traffic and environmental conditions. An alternative approach to WIM that addresses these limitations is the use of an instrumented bridge to weigh vehicles (B-WIM). This approach is the subject of research in this book. Inaccuracies derived from discrepancies between theoretical B-WIM algorithms and bridge measurements are investigated both theoretically and experimentally. The text also describes the development of a B-WIM system in Ireland, including all aspects of installation, calibration, data collection and its processing into useful traffic information.

Download or read book Next Generation Bridge Weigh in motion System Using Optical Sensors written by Myra Lydon and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nondestructive Evaluation and Health Monitoring of Highway Bridges written by Victor J. Hunt and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nondestructive Evaluation of Bridges and Highways III written by Steve B. Chase and published by SPIE-International Society for Optical Engineering. This book was released on 1999 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Integration of Nondestructive Evaluation and Bridge Management Systems written by George Hearn and published by . This book was released on 1996 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: A project for the integration of nondestructive testing methods and bridge management systems is reported. The project examines the practices for inspection of bridges, the information needs of bridge management systems, and the data and assessments offered by NDE methods to develop seamless, coordinated use of NDE methods. The project delivers new definitions of condition states for commonly recognized bridge elements, a catalog of NDE methods and guidance for their use in condition rating, a review of the role of visual inspections, and a methodology for the inclusion of new NDE methods as these become available.

Download or read book Evaluation of the Bridge Weigh in motion System written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nondestructive Evaluation Tools to Improve the Inspection Fabrication and Repair of Bridges written by Glenn A. Washer and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The goal of this research project in Nondestructive Evaluation (NDE) is to improve the safety and reliability of bridge through the exploration of three innovative technologies: (1) ultrasonic measurement of in-situ stress levels in gusset plates, (2) evaluation of ultrasonic testing (UT) and phased array testing, and (3) development of vehicle-mounted infrared thermography for bridge condition assessment" (page ii).

Download or read book Experimental and Field Investigation of a Bridge weigh in motion BWIM System Improving the Accuracy of Bridge Inspection Evaluation and Fatigue Assessment written by Sofia Faraz and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridges are vital component of a country's transportation system and its economy. However, large number of ageing bridges are either structurally or geometrically deficient in some way. In recent years, the remaining life of ageing bridges, were calculated by detailed evaluation and damage assessment using structural health monitoring (SHM) techniques integrating bridge-weigh-in-motion (BWIM) systems. The field study of an existing BWIM system in Winnipeg, Manitoba was conducted on the Prototype Bridge. This work was extended to analysis and comparison of the algorithms adopted on the Prototype Bridge which provided deep insight in identifying the sources of error in BWIM systems. It was followed by a study on fatigue assessment of steel girder bridges. This research contributes by incorporating field measurements from BWIM system on the Prototype Bridge to estimate fatigue loading and damage assessment. In analytical phase, a simply supported beam subjected to moving and pulsating load was investigated for signal simulation and filtering in MATLAB. This was done as an initial exercise to understand dynamic effects of the load and its relevance to bridge natural frequency. This work was presented in a conference proceeding, attached in appendix. The experimental part of this work aims to identify sources of error in BWIM systems with the aid of the Model Bridge and verify area method, tested on the Prototype Bridge. The method was further investigated on the Model Bridge to obtain 95% confidence interval over real bridge BWIM testing. Model bridge structure was fabricated using polycarbonate. The model was designed to have natural frequencies like the Prototype Bridge. It was instrumented at two different locations with piezoelectric sensors for estimating velocity, transverse position, and class of model truck. It was instrumented with electrical strain gauges at three transverse locations for estimating Gross Vehicle Weight (GVW) of model truck. Video camera was used for verifying velocity profile. Author endeavored to establish relevance of long-term monitoring data obtained from BWIM to bridge evaluation. In this work it was proposed that SHM will add another level of inspection to CHBDC clauses and will improve the estimation of load carrying capacities of existing bridges.

Download or read book Bridge Maintenance Safety Management Life cycle Performance and Cost written by Paulo J. S. Cruz and published by Taylor & Francis Group. This book was released on 2006 with total page 1138 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from leading experts, this book addresses all major aspects of bridge maintenance, safety, and management and delineates the state of the art in bridge maintenance and safety. It offers advice for decision making in bridge maintenance, safety, management, and cost for the purpose of enhancing the welfare of society. Topics include deterioration modeling, emerging technologies, field testing, financial planning, health monitoring, high-performance materials, innovations, load capacity assessment, maintenance strategies, new technology and materials, nondestructive testing, future traffic demands, reliability and risk, sustainable materials, whole-life costing, and more.

Download or read book Tools for Assuring WIM Data Quality written by Olga I. Selezneva and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Weigh-in-motion (WIM) systems provide an estimate of the static weight of moving vehicles. WIM data is used for transportation and freight planning, pavement and bridge design, and highway safety investigations. NCHRP Research Report 1070: Tools for Assuring WIM Data Quality: Practical Guide, from TRB's National Cooperative Highway Research Program, provides state departments of transportation with new procedures to help practitioners improve accuracy and increase the reliability of WIM data. Supplemental to the report are NCHRP Web-Only Document 370: LTPP Data Analysis: Practical Tools and Procedures to Improve WIM Data Quality and six Excel spreadsheet tools."--Publisher's website

Download or read book Strengthening Forensic Science in the United States written by National Research Council and published by National Academies Press. This book was released on 2009-07-29 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scores of talented and dedicated people serve the forensic science community, performing vitally important work. However, they are often constrained by lack of adequate resources, sound policies, and national support. It is clear that change and advancements, both systematic and scientific, are needed in a number of forensic science disciplines to ensure the reliability of work, establish enforceable standards, and promote best practices with consistent application. Strengthening Forensic Science in the United States: A Path Forward provides a detailed plan for addressing these needs and suggests the creation of a new government entity, the National Institute of Forensic Science, to establish and enforce standards within the forensic science community. The benefits of improving and regulating the forensic science disciplines are clear: assisting law enforcement officials, enhancing homeland security, and reducing the risk of wrongful conviction and exoneration. Strengthening Forensic Science in the United States gives a full account of what is needed to advance the forensic science disciplines, including upgrading of systems and organizational structures, better training, widespread adoption of uniform and enforceable best practices, and mandatory certification and accreditation programs. While this book provides an essential call-to-action for congress and policy makers, it also serves as a vital tool for law enforcement agencies, criminal prosecutors and attorneys, and forensic science educators.

Download or read book Eco efficient Pavement Construction Materials written by Fernando Pacheco-Torgal and published by Woodhead Publishing. This book was released on 2020-01-18 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eco-efficient Pavement Construction Materials acquaints engineers with research findings on new eco-efficient pavement materials and how they can be incorporated into future pavements. Divided into three distinctive parts, the book emphasizes current research topics such as pavements with recycled waste, pavements for climate change mitigation, self-healing pavements, and pavements with energy harvesting potential. Part One considers techniques for recycling, Part Two reviews the contribution of pavements for climate change mitigation, including cool pavements, the development of new coatings for high albedo targets, and the design of pervious pavements. Finally, Part Three focuses on self-healing pavements, addressing novel materials and design and performance. Finally, the book discusses the case of pavements with energy harvesting potential, addressing different technologies on this field. Offers a clear and concise lifecycle assessment of asphalt pavement recycling for greenhouse gas emission with temporal aspects Applies key research trends to green the pavement industry Includes techniques for recycling waste materials, the design of cool pavements, self-healing mechanisms, and key steps in energy harvesting