Evaluation of Repair Procedures for Web Gap Fatigue Damage

Evaluation of Repair Procedures for Web Gap Fatigue Damage PDF

Author: P. B. Keating

Publisher:

Published: 1996

Total Pages: 170

ISBN-13:

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Connection plates cross frame diaphragms not rigidly attached to tension flanges can develop fatigue cracking in the unstiffened web gap due to the out-of-plane distortion. This report investigates repair procedures for fatigue damage in the web gap of steel highway bridges. The procedures investigated include drilling holes at crack tips, flame-cutting holes to remove extensively cracked regions, and gouging and rewelding. In addition, rigid attachment retrofits of tight-fit and cut-short connection plate details are examined. The evaluation of these repairs are made by monitoring their implementation on an in-service bridge, laboratory fatigue testing of simulated repairs, and finite element analysis. All three crack repair procedures were found to be viable. However, procedures outlined must be followed to achieve the quality in the repair that will insure continued safe use of the bridge throughout its remaining life. The results indicate that the degree of finish given to the repair is as important as satisfying the prescribed repair criteria.

Fatigue Evaluation of Steel Bridges

Fatigue Evaluation of Steel Bridges PDF

Author: Mark Douglas Bowman

Publisher: Transportation Research Board

Published: 2012

Total Pages: 125

ISBN-13: 030925826X

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"TRB's National Cooperative Highway Research Program (NCHRP) Report 721: Fatigue Evaluation of Steel Bridges provides proposed revisions to Section 7--Fatigue Evaluation of Steel Bridges of the American Association of State Highway and Transportation Officials Manual for Bridge Evaluation with detailed examples of the application of the proposed revisions."--Publisher's description.

NCHRP Report

NCHRP Report PDF

Author: National Research Council (U.S.). Transportation Research Board

Publisher:

Published: 1964

Total Pages: 104

ISBN-13:

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Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports PDF

Author:

Publisher:

Published: 1995

Total Pages: 456

ISBN-13:

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Bridge Evaluation, Repair and Rehabilitation

Bridge Evaluation, Repair and Rehabilitation PDF

Author: A.S. Nowak

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 618

ISBN-13: 9400921535

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Evaluation, repair and rehabilitation of bridges are increasingly important topics in the effort to deal with the deteriorating infrastructure. For example, in the United States about 40 percent of the nation's 570,000 bridges are classified, according to the Federal Highway Administra tion's (FHW A) criteria, as deficient and in need of rehabilitation and replacement. In other countries the situation is similar. FHW A estimates the cost of a bridge replacement and reha bilitation program at 50 billion dollars. The major factors that have contributed to the present situation are: the age, inadequate maintenance, increasing load spectra and environmental contamination. The deficient bridges are posted, repaired or replaced. The disposition of bridges involves clear economical and safety implications. To avoid high costs of replacement or repair, the evaluation must accurately reveal the present load carrying capacity of the struc ture and predict loads and any further changes in the capacity (deterioration) in the applicable time span. Accuracy of bridge evaluation can be improved by using the recent developments in bridge diagnostics, structural tests, material tests, structural analysis and probabilistic methods. There is a need for an international exchange of advanced experience to increase the research effi ciency. The Workshop is organized on the premise that the exchange of existing American and European experience in the area of bridge evaluation, repair and rehabilitation is beneficial for both parties involved.

Industrial and Engineering Applications or Artificial Intelligence and Expert Systems

Industrial and Engineering Applications or Artificial Intelligence and Expert Systems PDF

Author: Takushi Tanaka

Publisher: CRC Press

Published: 1997-01-30

Total Pages: 838

ISBN-13: 9789056995249

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This volume includes the proceedings from Proceedings of the Ninth International Conference Fukuoka, Japan, June 4-7, 1996. This work represents a broad spectrum of new ideas in the field of applied artificial intelligence and expert systems, and serves to disseminate information regarding intelligent methodologies and their implementation in solving various problems in industry and engineering.

Bridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability

Bridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability PDF

Author: Joan Ramon Casas

Publisher: CRC Press

Published: 2022-06-27

Total Pages: 2646

ISBN-13: 1000798739

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Bridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability contains lectures and papers presented at the Eleventh International Conference on Bridge Maintenance, Safety and Management (IABMAS 2022, Barcelona, Spain, 11–15 July, 2022). This e-book contains the full papers of 322 contributions presented at IABMAS 2022, including the T.Y. Lin Lecture, 4 Keynote Lectures, and 317 technical papers from 36 countries all around the world. The contributions deal with the state-of-the-art as well as emerging concepts and innovative applications related to the main aspects of safety, maintenance, management, life-cycle, resilience, sustainability and technological innovations of bridges. Major topics include: advanced bridge design, construction and maintenance approaches, safety, reliability and risk evaluation, life-cycle management, life-cycle, resilience, sustainability, standardization, analytical models, bridge management systems, service life prediction, structural health monitoring, non-destructive testing and field testing, robustness and redundancy, durability enhancement, repair and rehabilitation, fatigue and corrosion, extreme loads, needs of bridge owners, whole life costing and investment for the future, financial planning and application of information and computer technology, big data analysis and artificial intelligence for bridges, among others. This volume provides both an up-to-date overview of the field of bridge engineering and significant contributions to the process of making more rational decisions on bridge safety, maintenance, management, life-cycle, resilience and sustainability of bridges for the purpose of enhancing the welfare of society. The volume serves as a valuable reference to all concerned with and/or involved in bridge structure and infrastructure systems, including students, researchers and practitioners from all areas of bridge engineering.

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