Download or read book Moment rotation Relationships for Unified Autostress Design of Continuous span Bridge Beams and Girders written by Donald W. White and published by . This book was released on 1997 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of LRFD Specifications for Horizontally Curved Steel Girder Bridges written by J. M. Kulicki and published by Transportation Research Board. This book was released on 2006 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains the findings of research performed to develop design specifications for horizontally curved steel girder bridges.
Download or read book Autostress Design of Highway Bridges written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1993 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stability and Ductility of Steel Structures SDSS 99 written by D. Dubin&acaron; and published by Elsevier. This book was released on 1999-08-03 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the gradual development of rules for designing against instability the idea emerged, in London, in 1974 to hold an International Colloquium treating every aspect of structural instability of steel structures. There have been 17 International Colloquia Stability Sessions around the world, starting with the first one in Paris in 1972, until with the last one in Nagoya in 1997. In Nagoya it was decided to continue the series of travelling colloquia by launching the Sixth Colloquium in September 1999 with the First Session to be held at the "Politehnica" University of Timişoara, România, which will be followed by another in the year 2000 at the Gediminas Technical University in Vilnius, Lithuania, a third one during SSRC's Year 2000 Annual Meeting in the US, and a fourth one in Australia or New Zealand. At present important research projects are in progress around the world, like SAC Joint Venture Project in USA, INCO-COPERNICUS "RECOS" in Europe and others, which are devoted to improve and develop new methods for the safety design of steel structures in seismic zones. Special attention is paid in Europe, USA and Japan to improve the design codes and detailing of seismic resistant steel structures. This was the reason to organise the Session of Nagoya as "Stability and Ductility of Steel Structures" Colloquium. Romania is also a strong seismic territory and therefore, the topic of the Timişoara Session covered both stability and ductility problems. The technical programme of the SDSS'99 Colloquium in Timişoara has been split into nine working sessions.
Download or read book Moment Redistribution of Continuous Hybrid Highway Bridge I girders Fabricated from HPS 100W Steel written by Tyler John Leben and published by . This book was released on 2012 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Moment redistribution from interior piers to adjacent spans of straight continuous span bridge girders is an alternate inelastic design procedure, Appendix B6 of the AASHTO LRFD Bridge Design Specifications (AASHTO 2010) that was formerly known as autostress design prior to the 2004 AASHTO Specification (Kayser 2005). This alternative inelastic design procedure recognizes that there is additional capacity beyond the elastic range of the material; when this additional capacity is recognized, localized yielding and inelastic rotation occurs at the section of maximum moment, over an interior pier of a continuous span (Kayser 2005). Moment at this location is automatically relocated or redistributed to the adjacent spans that generally have a lower moment demand (Kayser 2005). Once the moment has been redistributed, a more balanced moment envelope is obtained (Kayser 2005). The reduction in the maximum moment allows the section over the interior pier to be designed for a smaller moment, resulting in a reduced section, fatigue details, material weight, and fabrication costs (Kayser 2005). This research investigated if Appendix B6 of the AASHTO LRFD Bridge Design Specifications (AASHTO 2010) is an acceptable method for predicting inelastic behavior of a typical single full-length continuous steel hybrid highway bridge I-girder fabricated from HPS-100W flanges and conventional steel webs, with specified minimum yield strength of 100.0 ksi and 50.0 ksi., respectively. Through finite element modeling, it was found that AASHTO (2010) predictions for moment-rotation behaviors are similar for a full-length continuous steel hybrid highway bridge I-girder fabricated from HPS-100W flanges and conventional steel webs, with specified minimum yield strength of 100.0 ksi and 50.0 ksi, respectively. However, further investigation is required to determine if a maximum allowable plastic rotation should be inflicted to prevent the possibility of rupture of the flange. In addition, this research investigated if varying the grade of steel that the flanges of a hybrid section are fabricated from has an effect on the shear demand on the crossframes in a bridge system. Three different hybrid girder configurations were considered. Each configuration consisted of a top and bottom flange fabricated from one grade of steel and the web fabricated from A572 specified minimum yield stress of 50.0 ksi. The flanges were either material grade HPS-100W with a specified minimum yield stress of 100.0 ksi, HPS-70W with a specified minimum yield stress of 70.0 ksi, or A572-50 with a specified minimum yield stress of 50.0 ksi. Through finite element modeling, it was found that shear demand in the crossframes do not differ by a significant amount due to the change in grade of steel in the flanges of the hybrid section with 50.0 ksi grade steel in the webs. Therefore, the lateral moment redistribution is assumed to be comparable to the characteristics of lateral moment redistribution that is exhibited by lower grade materials.
Download or read book Connection Between Simple Span Precast Concrete Girders Made Continuous written by Amy J. Dimmerling and published by . This book was released on 2002 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precast prestressed concrete girders have been used in bridge construction for several years in the United States. In general, these types of bridges have performed well in service conditions. Although the connections over the supports provide sufficient continuity for dead loads, which cause negative moments, there has been some concern about the ability of the connections to provide continuity for the positive moments caused by live loads. Cracking has been observed at the bottom of the diaphragm at the connection and this raises concern about the connection's performance. The National Cooperative Highway Research Program developed Project 12-53 to study the effectiveness of these connections. The focus of this research deals with the experimental testing part of project 12-53. Six specimens that represent portions of full-size bridges were tested under monotonic and cyclic loads to evaluate their performance after cracking occurs at the bottom of the diaphragm. Each connection was fatigued until the connection was considered to have failed. The bent strand and bent bar embedded connections performed well under service moments. Under negative moment all of the specimens performed well. Even after failure of the specimens they each were able to resist the negative moment. This was due to the bearing of the diaphragm against the beams. The crack closes and at this point there is no difference between the specimens. Under positive moment the embedded specimens were stiffer and the failure was more gradual than that of the not embedded specimens. The embedment adds to the stiffness of the specimens. The engagement of the diaphragm in the embedded specimens helps to prolong the failure. The warning signs of failure are more prominent in the embedded specimens. The bent bar specimens are stiffer than the bent strand but the failure occurs more rapidly. After all six of the short-length specimens are tested, full-size specimens will be tested. At that point, results from all testing will be compared and discussed providing conclusions about the behavior of positive moment connections. Also, recommendations are expected as to the design and construction of positive moment connections in precast/prestressed bridge girders made continuous.
Download or read book Transportation Research Record written by and published by . This book was released on 1974 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Finite Element Analysis of Inelastic Behavior of Structural Steel Beams and Bridge Girders written by Pao-Chung Huang and published by . This book was released on 1994 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Inelastic Rotation Requirements of Two span Continuous Bridge Girders written by Allen A. Jayne and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This document presents the results of an analytical study performed to assess the inelastic rotation requirements of two-span continuous bridge girders. Specifically, expressions describing the inelastic rotation requirements at the first plastic hinge, to allow formation of a collapse mechanism in the beam, are developed. The study considers twenty-one individual load cases conforming to the requirements of the current AASHTO LRFD Bridge Design Specifications. For each load case, expressions describing the hinge load, the collapse load, and the required inelastic rotation are presented in terms of beam plastic moment strength Mp, flexural stiffness EI, and span L. The accuracy of the derived expressions is verified using the commercially available structural analysis software packages FOPA and RISA 2-D. Using the expressions developed, values for the required rotation capacity are determined. These values are compared to the long established required minimum rotation capacity of 3.0 referenced in the current AASHTO specifications. The origin of the required minimum rotation capacity of 3.0 is also considered. The results of the analytical study indicate that a rotation capacity of 3.0 is not sufficient to allow formation of a collapse mechanism for several of the load cases considered.
Download or read book Proceedings written by Structural Stability Research Council. Technical Session and published by . This book was released on 1997 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Information Service and published by . This book was released on 1989 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guide to Stability Design Criteria for Metal Structures written by Ronald D. Ziemian and published by John Wiley & Sons. This book was released on 2010-02-08 with total page 1120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive guide to stability design criteria, fully updated and incorporating current research Representing nearly fifty years of cooperation between Wiley and the Structural Stability Research Council, the Guide to Stability Design Criteria for Metal Structures is often described as an invaluable reference for practicing structural engineers and researchers. For generations of engineers and architects, the Guide has served as the definitive work on designing steel and aluminum structures for stability. Under the editorship of Ronald Ziemian and written by SSRC task group members who are leading experts in structural stability theory and research, this Sixth Edition brings this foundational work in line with current practice and research. The Sixth Edition incorporates a decade of progress in the field since the previous edition, with new features including: Updated chapters on beams, beam-columns, bracing, plates, box girders, and curved girders. Significantly revised chapters on columns, plates, composite columns and structural systems, frame stability, and arches Fully rewritten chapters on thin-walled (cold-formed) metal structural members, stability under seismic loading, and stability analysis by finite element methods State-of-the-art coverage of many topics such as shear walls, concrete filled tubes, direct strength member design method, behavior of arches, direct analysis method, structural integrity and disproportionate collapse resistance, and inelastic seismic performance and design recommendations for various moment-resistant and braced steel frames Complete with over 350 illustrations, plus references and technical memoranda, the Guide to Stability Design Criteria for Metal Structures, Sixth Edition offers detailed guidance and background on design specifications, codes, and standards worldwide.
Download or read book Bridge Engineering Handbook written by Wai-Fah Chen and published by CRC Press. This book was released on 2019-09-11 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 1999: The Bridge Engineering Handbook is a unique, comprehensive, and state-of-the-art reference work and resource book covering the major areas of bridge engineering with the theme "bridge to the 21st century."
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 Marine Concrete Structures written by Mark Alexander and published by Woodhead Publishing. This book was released on 2016-09-13 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine Concrete Structures: Design, Durability and Performance comprehensively examines structures located in, under, or in close proximity to the sea. A major emphasis of the book is on the long-term performance of marine concrete structures that not only represent major infrastructure investment and provision, but are also required to operate with minimal maintenance. Chapters review the design, specification, construction, and operation of marine concrete structures, and examine their performance and durability in the marine environment. A number of case studies of significant marine concrete structures from around the world are included which help to reinforce the principles outlined in earlier chapters and provide useful background to these types of structures. The result is a thorough and up-to-date reference source that engineers, researchers, and postgraduate students in this field will find invaluable. Covers, in detail, the design, specification, construction, and operation of marine concrete structures Examines the properties and performance of concrete in the marine environment Provides case studies on significant marine concrete structures and durability-based design from around the world
Download or read book Steel concrete Composite Bridges written by David Collings and published by Thomas Telford. This book was released on 2005 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Steel-concrete composite bridges shows how to choose the bridge form and design element sizes to enable the production of accurate drawings and also highlights a wide and full range of examples of the design and construction of this bridge type."--Jacket.
Download or read book Ground Improvement written by Professor Jian Chu and published by Elsevier. This book was released on 2005-11-07 with total page 1137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book of its kind, providing over thirty real-life case studies of ground improvement projects selected by the worlds top experts in ground improvement from around the globe. Volume 3 of the highly regarded Elsevier Geo-engineering book series coordinated by the Series Editor: Professor John A Hudson FREng. An extremely reader friendly chapter format. Discusses wider economical and environmental issues facing scientists in the ground improvement. Ground improvement has been both a science and art, with significant developments observed through ancient history. From the use of straw as blended infill with soils for additional strength during the ancient Roman civilizations, and the use of elephants for compaction of earth dams during the early Asian civilizations, the concepts of reinforced earth with geosynthetics, use of electrokinetics and thermal modifications of soils have come a long way. The use of large and stiff stone columns and subsequent sand drains in the past has now been replaced by quicker to install and more effective prefabricated vertical drains, which have also eliminated the need for more expensive soil improvement methods.The early selection and application of the most appropriate ground improvement techniques can improve considerably not only the design and performance of foundations and earth structures, including embankments, cut slopes, roads, railways and tailings dams, but also result in their cost-effectiveness. Ground improvement works have become increasingly challenging when more and more problematic soils and marginal land have to be utilized for infrastructure development.This edited compilation contains a collection of Chapters from invited experts in various areas of ground improvement, who have illustrated the basic concepts and the applications of different ground improvement techniques using real projects that they have been involved in. The case histories from many countries ranging from Asia, America, Australia and Europe are addressed.
