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Author : Anthony P. Pavia
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (156 download)
Download or read book Reliability Approach to Fatigue Design of Highway Bridges written by Anthony P. Pavia and published by . This book was released on 1975 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anthony Pavia
Publisher :
ISBN 13 :
Total Pages : 432 pages
Book Rating : 4.:/5 (225 download)
Download or read book Reliability Approach to Fatigue Design of Highway Bridges written by Anthony Pavia and published by . This book was released on 1977 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ahmed Mostafa Tawfik Farag
Publisher :
ISBN 13 :
Total Pages : 231 pages
Book Rating : 4.:/5 (916 download)
Download or read book Calibration of Fatigue Design Factors and Fatigue Life Reliability of Steel Highway Bridges Using WIM Databases written by Ahmed Mostafa Tawfik Farag and published by . This book was released on 2015 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue life assessment of steel highway bridges is crucial to maintain their safety. Researches are required to quantify uncertainties in loading, resistance, fatigue life prediction and improvement techniques. This study calibrates some fatigue code parameters and models fatigue loading probabilistically using truck data in Canada. Fatigue life improvement by weld toe grinding is assessed experimentally and numerically. Finally, the remaining fatigue life using reliability-based method for cruciform bridge welded detail is predicted. Truck data screening is vital to ensure its quality in calibration and load history prediction. Three different fatigue truck factors and equivalent number of cycles are proposed, using single and dual slope curves, for three bridge span ranges. Span length and fatigue category affected the calibration in short spans and dual slope curves. Using Ontario and Quebec data, probabilistic distributions for stress-range histograms for bridge spans and configurations are developed. Weld toe grinding improved the fatigue life by 60% for category E joint compared to the non-ground specimen. Still, weld imperfections might adverse grinding effect. In deterministic fatigue life prediction, energy-based approach is used for crack initiation, while linear elastic fracture mechanics is used for crack propagation. An initial spherical flaw size of 0.1 mm with no residual stresses leads to the most precise prediction of fatigue resistance for test specimens. For the probabilistic fatigue life prediction of cruciform detail of 6.4 mm fillet weld size, the fatigue life of the concave weld profiles are usually larger than the convex ones. The study developed a method to convert the probabilistic stress range into number of cycles for remaining fatigue life reliability of steel detail. The generated reliability illustrates the fatigue repair and inspection management.
Author : P. Albrecht
Publisher :
ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (125 download)
Download or read book S-N Fatigue Reliability Analysis of Highway Bridges written by P. Albrecht and published by . This book was released on 1983 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a method of calculating the expected fatigue failure probability of a structural detail, given the distribution of resistance and load. The resistance data, in terms of cycles to failure, come from previous laboratory tests. The load data come either from stress range histograms recorded on bridges or from loadmeter surveys. The proposed method replaces each histogram by an equivalent stress range and converts the latter into a distribution in terms of number of cycles. The problem is thus cast into the standard format for reliability analysis and allows one to calculate failure probabilities. Application of the method to designs in accordance with the AASHTO Specifications showed that fatigue failure probabilities for redundant load path (RLP) structures are inconsistent and vary greatly from PF = 9.2 x 10-2 for Category B to PF = 9.2 x 10-10 for Category E'. For nonredundant load path (NRLP) structures, they vary from PF = 5.1 x 10-2 for Category A to PF = 2.1 x 10-22 for Category E. It is proposed that the specifications be revised to include: (1) allowable stress ranges for RLP and NRLP structures with uniform failure probabilities; (2) explicit formulation of the specifications in terms of the actual number of single "fatigue trucks," each causing an equivalent stress range; and (3) continuous definition of allowable stress range versus truck traffic volume. An example illustrates the design of a bridge, not covered by the AASHTO specifications, to a specified failure probability.
Author : Androula Y. Michael
Publisher :
ISBN 13 :
Total Pages : 556 pages
Book Rating : 4.:/5 (319 download)
Download or read book Fatigue Reliability and Fracture Behavior of Highway Steel Bridges written by Androula Y. Michael and published by . This book was released on 1989 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Surya K. Raju
Publisher :
ISBN 13 :
Total Pages : 236 pages
Book Rating : 4.:/5 (176 download)
Download or read book Implementation of Reliability Based Design and Evaluation for Highway Bridge Fatigue Life written by Surya K. Raju and published by . This book was released on 1988 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Narendra Taly
Publisher : CRC Press
ISBN 13 : 1466552182
Total Pages : 966 pages
Book Rating : 4.4/5 (665 download)
Download or read book Highway Bridge Superstructure Engineering written by Narendra Taly and published by CRC Press. This book was released on 2014-11-21 with total page 966 pages. Available in PDF, EPUB and Kindle. Book excerpt: A How-To Guide for Bridge Engineers and Designers Highway Bridge Superstructure Engineering: LRFD Approaches to Design and Analysis provides a detailed discussion of traditional structural design perspectives, and serves as a state-of-the-art resource on the latest design and analysis of highway bridge superstructures. This book is applicable to highway bridges of all construction and material types, and is based on the load and resistance factor design (LRFD) philosophy. It discusses the theory of probability (with an explanation leading to the calibration process and reliability), and includes fully solved design examples of steel, reinforced and prestressed concrete bridge superstructures. It also contains step-by-step calculations for determining the distribution factors for several different types of bridge superstructures (which form the basis of load and resistance design specifications) and can be found in the AASHTO LRFD Bridge Design Specifications. Fully Realize the Basis and Significance of LRFD Specifications Divided into six chapters, this instructive text: Introduces bridge engineering as a discipline of structural design Describes numerous types of highway bridge superstructures systems Presents a detailed discussion of various types of loads that act on bridge superstructures and substructures Discusses the methods of analyses of highway bridge superstructures Includes a detailed discussion of reinforced and prestressed concrete bridges, and slab-steel girder bridges Highway Bridge Superstructure Engineering: LRFD Approaches to Design and Analysis can be used for teaching highway bridge design courses to undergraduate- and graduate-level classes, and as an excellent resource for practicing engineers.
Author : Naiwei Lu
Publisher : Momentum Press
ISBN 13 : 1947083392
Total Pages : 231 pages
Book Rating : 4.9/5 (47 download)
Download or read book Multi-Scale Reliability and Serviceability Assessment of In-Service Long-Span Bridges written by Naiwei Lu and published by Momentum Press. This book was released on 2018-05-08 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the development in global economic and transportation engineering, the traffic loads on brides have been growing steadily, which become potential safety hazards for existing bridges. In particular, long-span suspension bridges support heavy traffic volumes and simultaneous truck loads on the bridge deck, and thus the safety and serviceability of the bridge deserves investigation. In this book, a multiscale reliability method is presented for the safety assessment of long-span bridges. The multiscale failure condition of stiffness girders is the first-passage criteria for the large-scale model and the fatigue damage criteria for the small-scale model. It is the objective of this book to provide a more in-depth understanding of the vehicle-bridge interaction from the random vibration perspective. This book is suitable for adoption as a text book or a reference book in an advanced structural reliability analysis course. Furthermore, this book also provides a theoretical foundation for better understanding of the safety assessment, operation management, maintenance and reinforcement for long-span bridges and motivates further research and development for more advanced reliability and serviceability assessment techniques for long-span bridges.
Author : J. M. Bloom
Publisher : ASTM International
ISBN 13 : 9780803102422
Total Pages : 228 pages
Book Rating : 4.1/5 (24 download)
Download or read book Probabilistic Fracture Mechanics and Fatigue Methods written by J. M. Bloom and published by ASTM International. This book was released on 1983 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stephen J. Ressler
Publisher :
ISBN 13 :
Total Pages : 263 pages
Book Rating : 4.:/5 (251 download)
Download or read book Fatigue Reliability and Redundancy in Two-girder Steel Highway Bridges written by Stephen J. Ressler and published by . This book was released on 1992 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mark Douglas Bowman
Publisher : Transportation Research Board
ISBN 13 : 030925826X
Total Pages : 125 pages
Book Rating : 4.3/5 (92 download)
Download or read book Fatigue Evaluation of Steel Bridges written by Mark Douglas Bowman and published by Transportation Research Board. This book was released on 2012 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: "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.
Author : Peter J. Massarelli
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (479 download)
Download or read book Fatigue Reliability of Steel Highway Bridge Details written by Peter J. Massarelli and published by . This book was released on 2001 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The expected life of a steel highway bridge subjected to random, variable-amplitude traffic cycles is highly dependent on damage accumulation caused by various fatigue mechanisms. This study addressed some of the issues associated with developing probabilistic reliability models for steel bridge structures under vehicular traffic loadings. Specifically, methods for incorporating inspection data (e.g., the presence and size of cracks) into classical and fracture mechanics-based fatigue models to predict fracture-critical element damage accumulation were analyzed. The block loading method introduced here assigns a damage state to the cracked detail after each vehicle passage. This method is limited to loading blocks where the plastic zone at the crack tip developed by the pseudo-static response of the bridge must be larger than the crack growth caused by the subsequent dynamic cycles for each vehicle passage. It must also be assumed that the crack length is fixed during a loading block. This method accounts for closure effects by predicting the occurrence of damage only when the crack is opened. When a bridge inspection reveals fatigue cracks, field data in the form of strain measurements can be collected in the vicinity of the fracture detail to identify the characteristic stress block and the fluctuations in the curve attributes attributable to randomness of the traffic loading. Then, the data can be analyzed to identify the statistical properties of the attribute parameters, which include the magnitude of the pseudo-static response, the number of dynamic cycles in each block, and the duration of the vehicle passage. With this information, the distribution of stress blocks can be estimated, and the block loading method can be employed to calculate the fatigue lifetime of each critical detail.
Author : Benjamin Thomas Cross
Publisher :
ISBN 13 : 9780549060093
Total Pages : 101 pages
Book Rating : 4.0/5 (6 download)
Download or read book Analysis of the AASHTO Fatigue Design Provisions for Welded Steel Bridge Details Using Reliability Theory written by Benjamin Thomas Cross and published by . This book was released on 2007 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current fatigue design provisions in the AASHTO LRFD Specifications (2004) are based on an allowable stress approach. Provisions for most limit states, however, have been updated to the more modern reliability-based Load and Resistance Factor Design (LRFD) approach. The primary objective of the reported research was to assess the reliability present in the AASHTO fatigue design specifications for welded steel bridge details such that more uniform design provisions can eventually be implemented. To accomplish this, a reliability model was developed assuming a log-log straight line fatigue resistance model. The statistical parameters of the variables included in the model were determined based on sound engineering judgment and values used in similar past studies. The safety indices present in the current design provisions were then evaluated. The results indicate that the safety level of the current design provisions varies by span length and by detail category. Therefore, a target safety index was selected based on those currently present in design and new design fatigue resistance coefficients were proposed such that the safety level of the fatigue specifications would be uniform across all detail categories for a given set of design conditions. In addition, the safety of the design variable amplitude fatigue limits was evaluated through the use of computer simulations. New variable amplitude fatigue limits were then proposed to correspond with the proposed design fatigue resistance coefficients.
Author : O. Ditlevsen
Publisher : Wiley
ISBN 13 : 9780471960867
Total Pages : 0 pages
Book Rating : 4.9/5 (68 download)
Download or read book Structural Reliability Methods written by O. Ditlevsen and published by Wiley. This book was released on 1996-06-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses probabilistic methods for the evaluation of structural reliability, including the theoretical basis of these methods. Partial safety factor codes under current practice are briefly introduced and discussed. A probabilistic code format for obtaining a formal reliability evaluation system that catches the most essential features of the nature of the uncertainties and their interplay is then gradually developed. The concepts presented are illustrated by numerous examples throughout the text. The modular approach of the book allows the reader to navigate through the different stages of the methods.
Author : PJ. Massarelli
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (948 download)
Download or read book Fatigue Reliability of Steel Highway Bridge Details written by PJ. Massarelli and published by . This book was released on 2001 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Fred Moses
Publisher : Transportation Research Board National Research
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.3/5 (555 download)
Download or read book Fatigue Evaluation Procedures for Steel Bridges written by Fred Moses and published by Transportation Research Board National Research. This book was released on 1987 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Naiwei Lu
Publisher : CRC Press
ISBN 13 : 1000384128
Total Pages : 255 pages
Book Rating : 4.0/5 (3 download)
Download or read book Reliability and Safety of Cable-Supported Bridges written by Naiwei Lu and published by CRC Press. This book was released on 2021-06-17 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge design and construction technologies have experienced remarkable developments in recent decades, and numerous long-span bridges have been built or are under construction all over the world. Cable-supported bridges, including cable-stayed bridges and suspension bridges, are the main type of these long-span bridges, and are widely used in highways crossing gorges, rivers, and gulfs, due to their superior structural mechanical properties and beautiful appearance. However, cable-supported bridges suffer from harsh environmental effects and complex loading conditions, such as heavier traffic loads, strong winds, corrosion effects, and other natural disasters. Therefore, the lifetime safety evaluation of these long-span bridges considering the rigorous service environments is an essential task. Features: Presents a comprehensive explanation of system reliability evaluation for all aspects of cable-supported bridges. Includes a comprehensive presentation of the application of system reliability theory in bridge design, safety control, and operational management. Addresses fatigue reliability, dynamic reliability and seismic reliability assessment of bridges. Presents a complete investigation and case study in each chapter, allowing readers to understand the applicability for real-world scenarios. Reliability and Safety of Cable-Supported Bridges provides a comprehensive application and guidelines for system reliability techniques in cable-supported bridges. Serving as a practical educational resource for both undergraduate and graduate level students, practicing engineers, and researchers, it also intends to provide an intuitive appreciation for probability theory, statistical methods, and reliability analysis methods.
