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Author :
Publisher :
ISBN 13 :
Total Pages : 271 pages
Book Rating : 4.:/5 (48 download)
Download or read book Comparison of United States and New Zealand Seismic Design Practices for Highway Practices [i.e. Bridges] written by and published by . This book was released on 1986 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Applied Technology Council
Publisher :
ISBN 13 :
Total Pages : 286 pages
Book Rating : 4.F/5 ( download)
Download or read book Comparison of United States and New Zealand Seismic Design Practices for Highway Bridges written by Applied Technology Council and published by . This book was released on 1982 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : fib Fédération internationale du béton. Task Group: Seismic design and assessment procedures for bridges
Publisher : FIB - Féd. Int. du Béton
ISBN 13 : 2883940797
Total Pages : 3 pages
Book Rating : 4.8/5 (839 download)
Download or read book Seismic Bridge Design and Retrofit -- Structural Solutions written by fib Fédération internationale du béton. Task Group: Seismic design and assessment procedures for bridges and published by FIB - Féd. Int. du Béton. This book was released on 2007 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge structures can give the impression that they are rather simple structural systems, whose seismic responses can be easily predicted. On the contrary, however, many bridges did not perform well in recent earthquakes, showing a need for increased research to understand various potential problems and collapse mechanisms. Indeed, progress has been made lately in design and assessment procedures around the world, and consequently many practices have changed. In this context, the objective of fib Bulletin 39 is to present, discuss and critically compare structural solutions for bridge seismic design and retrofit that have been developed and are now used all over the world, ten years after the publication of the last comprehensive manual on the subject. It is the result of the work of an international team of experts that collaborated intensively for over three years. The first four chapters of the Bulletin present a regional review of design choices, compare and discuss international design practices, and indicate their relative merits and potential problems. Current developments are treated in the next three chapters, with particular emphasis on design for enhanced damage control, for spatial variation of ground motion and for fault crossing. The last part presents a summary of current issues related to existing bridges. Extensive technical developments have been taking place in the last two decades with the goal of making bridges an important transportation infrastructure with limited damage during earthquakes. Realising this goal depends on regional seismicity, transportation systems, seismic performance goals, local cultures, and a wide range of design and construction practices, which are presented and discussed in this Bulletin.
Author : M. Lee Marsh
Publisher : Transportation Research Board
ISBN 13 : 0309223806
Total Pages : 138 pages
Book Rating : 4.3/5 (92 download)
Download or read book Performance-based Seismic Bridge Design written by M. Lee Marsh and published by Transportation Research Board. This book was released on 2013 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 440, Performance-Based Seismic Bridge Design (PBSD) summarizes the current state of knowledge and practice for PBSD. PBSD is the process that links decision making for facility design with seismic input, facility response, and potential facility damage. The goal of PBSD is to provide decision makers and stakeholders with data that will enable them to allocate resources for construction based on levels of desired seismic performance"--Publisher's description.
Author :
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (1 download)
Download or read book Seismic Vulnerability of New Highway Construction written by and published by . This book was released on 2002 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This executive summary gives an overview of the results of FHWA Contract DTFH61 92 C 00112, Seismic Research Program, which performed a series of special studies addressing the seismic design of new construction. The objectives of this project were to perform a series of special studies pertaining to the seismic vulnerability of highway structures, and to develop technical information on which future specifications for the seismic design of bridges could be based. This project divided work into 5 areas and 13 tasks, focusing on the following elements: review of current seismic design criteria, the seismic hazard exposure of the American highway system, foundation design and soil behavior, structural design, structural analysis and response, the relative importance of specific bridges and an assessment of the impact of current and recently completed research. The Seismic Research Program had a national focus, and aimed in part to address the differences in seismicity, bridge types, and typical design details between the central and eastern United States (CEUS) and those previously studied in California and the western United States. In many cases, west coast design practices required considerable modification before implementation in the CEUS. The project resulted in 34 research reports, of which 31 are summarized in this document. Seventeen of the reports have been published as National Center for Earthquake Engineering Research (NCEER) or Multidisciplinary Center for Earthquake Engineering Research (MCEER) reports. The research agencies final reports for the other taks are available from MCEER upon request.
Author : David Goodyear
Publisher :
ISBN 13 : 9780309480390
Total Pages : 130 pages
Book Rating : 4.4/5 (83 download)
Download or read book Seismic Design of Non-conventional Bridges written by David Goodyear and published by . This book was released on 2019 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 532: Seismic Design of Non-Conventional Bridges documents seismic design approaches and criteria used for "non-conventional" bridges, such as long-span cable-supported bridges, bridges with truss tower substructures, and arch bridges. Design of conventional bridges for seismic demands in the United States is based on one of two American Association of State Highway Transportation Officials (AASHTO) documents: the AASHTO Load and Resistance Factor Design (LRFD) Bridge Design Specifications (AASHTO BDS) (1) or the AASHTO Guide Specifications for LRFD Seismic Bridge Design (Guide Spec) (2). The stated scope of these documents for seismic design is limited to conventional bridges. Non-conventional bridges outside the scope of these two AASHTO documents, such as cable-supported bridges and long-span arch bridges, are typically high value investments designed with special project criteria. There is no current AASHTO standard seismic design criteria document specific to these non-conventional bridges. Seismic design criteria for these non-conventional bridges are typically part of a broader project-specific criteria document that addresses the special character of the bridge type.
Author : Ali Hajihashemi
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (966 download)
Download or read book Comparison and Evaluation of Displacement-based Methods and Modeling Assumptions for Design of Ordinary Bridges in High Seismic Regions Using Various Computer Software written by Ali Hajihashemi and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this research is to evaluate the effectiveness of three different displacement-based methods for seismic design of ordinary standard bridges. Two bridges previously designed by the Tennessee Department of Transportation (TDOT) engineers following the American Association of State Highway and Transportation Officials (AASHTO) Guide Specifications for LRFD Seismic Bridge Design are selected and investigated in this study. Two different support conditions are considered, one employing seat-type abutments with rigid bent foundations; and the second employing stub wall abutment with flexible bent foundations (Nonlinear Spring Support Configuration). In addition to the AASHTO Specifications, the analysis methods include the capacity-demand-diagram method, as an inelastic demand Capacity Demand Method (CSM), and Federal Emergency Management Agency (FEMA) 440 Procedure C as an equivalent linearization CSM. Pushover analysis methods are used to construct the capacity diagram of the system. Furthermore, the usability of the three most widely used software programs (SAP2000, ADINA, and OpenSees) for performing the displacement-based seismic analysis is studied.This research will provide TDOT engineers with the necessary information on which procedure is the best approach to use for design of highway bridges. Also, it provides information on how well previously designed bridges response when analyzed with the new displacement-based procedures. And finally, it will provide the TDOT engineers with information on capabilities and limitations of various software packages.
Author : Bardia Emami
Publisher :
ISBN 13 :
Total Pages : 418 pages
Book Rating : 4.:/5 (529 download)
Download or read book A Comparison Study of Seismic Design of MoDOT Highway Bridges Using AASHTO Standard Specifications and Proposed NCHRP Provisions written by Bardia Emami and published by . This book was released on 2003 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : B. Li
Publisher :
ISBN 13 : 9780478407006
Total Pages : 81 pages
Book Rating : 4.4/5 (7 download)
Download or read book Seismic Design of New Zealand Highway Bridges Under Spatially Varying Ground Excitations written by B. Li and published by . This book was released on 2012 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Applied Technology Council
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.:/5 (6 download)
Download or read book Seismic Design Guidelines for Highway Bridges written by Applied Technology Council and published by . This book was released on 1981 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document contains Guidelines for the seismic design of highway bridges. The Guidelines are the recommendations of a team of nationally recognized experts which included consulting engineers, academicians, State highway, and Federal agency representatives from throughout the United States. The Guidelines are comprehensive in nature and they embody several new concepts which are significant departures from existing design provisions. An extensive commentary documenting the basis for the Guidelines and an example demonstrating their use are included. A draft of the Guidelines was used to seismically redesign twenty-one bridges. Significant changes resulted from the redesigns and are reflected in this report. A summary of the redesigns is included.
Author : New Zealand National Society for Earthquake Engineering. Bridge Committee
Publisher :
ISBN 13 :
Total Pages : 75 pages
Book Rating : 4.:/5 (82 download)
Download or read book Seismic Design of Bridges written by New Zealand National Society for Earthquake Engineering. Bridge Committee and published by . This book was released on 1981 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Matius Andy Widjaja
Publisher :
ISBN 13 :
Total Pages : 73 pages
Book Rating : 4.:/5 (2 download)
Download or read book Influence of the New LRFD Seismic Guidelines on the Design of Bridges in Virginia written by Matius Andy Widjaja and published by . This book was released on 2004 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Virginia Department of Transportation is currently using the AASHTO Standard Specifications for Highway Bridges, with some modifications, for its seismic highway bridge design. In April 2001, the Recommended LRFD Guidelines for the Seismic Design of Highway Bridges were published. The influence of the LRFD Guidelines on Virginia bridges was investigated by analyzing two existing bridges. The first bridge has prestressed concrete girders and is located in the Richmond area. The second bridge has steel girders and is located in the Bristol area. Both bridges were two-span overpass structures with integral abutments. The bridges were analyzed using the methods prescribed in the guidelines. Then, the combined effects of the dead, live, and earthquake loads were compared to the strengths of the columns and the pier caps. The details of the bridge designs were also checked against the corresponding seismic design requirement. Results indicate that typical column spiral reinforcement is not adequate to satisfy the requirements of the new seismic guidelines. For the bridge in the Richmond area, spiral reinforcement was increased from a No. 5 at a 5-in pitch to a No. 5 at a 4-in pitch. For the bridge in Bristol, the increase was greater, from a No. 3 at 10.5 in to a No. 5 at 4 in. In addition to the increase in spiral reinforcement, other details, such as beam-column joint reinforcing and splice locations, require modifications. The calculated cost increases for the two bridges were 0.1 and 0.3 percent. An associated parametric study explored the effects on substructure design of different column heights, superstructure lengths, and soil classifications in different parts of Virginia. The study indicated that for bridges located on good soil (Class B), typical column longitudinal reinforcing ratios (about 1.5%) provide adequate strength to resist seismic forces. For bridges on poor soils (Class D) in regions of low to moderate seismic activity, column longitudinal reinforcing may need to be increased, particularly in bridges with short columns, long spans, and sliding bearings at the abutments. For bridges on poor soils in regions of higher seismic risk (Southwestern Virginia), column sizes may need to be increased. For columns designed as spiral columns, the increases in transverse column reinforcement will not be great, but for columns designed as tied columns, the increases will be significant.
Author : Ignatius Po Lam
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (156 download)
Download or read book Seismic Design of Highway Bridge Foundations written by Ignatius Po Lam and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides specific procedures for the seismic design of bridge foundations and abutments based on hand-calculation methods using design charts and computer methods. This report supplements the "Seismic Design Guidelines for Highway Bridges" published as a design specification by the American Association of State Highway and Transportation Officials (AASHTO) in 1983. Design procedures are presented for footings, piles, drilled shafts, and abutments. Comments on site investigation procedures and in situ and laboratory testing are also provided in relation to determination of site soil parameters for analyses. Additional comments are provided on earthquake-induced liquefaction and slope stability as they affect bridge foundation design. The selected design procedures were verified by comparing analytical predictions with experimental data.
Author : United States. Federal Highway Administration. Office of Bridge Technology
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (884 download)
Download or read book Seismic Retrofitting of Highway Bridges written by United States. Federal Highway Administration. Office of Bridge Technology and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthquakes in the United States and elsewhere have demonstrated the vulnerability of older bridges to even moderate earthquakes. Recognizing the need to upgrade the bridge inventory, the Federal Highway Administration (FHWA) began sponsoring research and development in seismic retrofitting in the early 1980's. A set of guidelines was published in 1983 and updated by NCEER with a synthesis of the literature in 1995 (Seismic retrofitting Manual for Highway Bridges FHWA-RD-94-052 May 1995). A short course was held in 1998. The course covered preliminary screening, detailed evaluation, and retrofit measures for highway bridges. In December 2006 the new FHWA retrofit manual (Seismic Retrofitting Manual for Highway Structures: Part 1-Bridges FHWA-HRT-06-032 January 2006) was distributed to all the states. The manual has doubled in length and incorporates over a decade of research by MCEER and the practical experience of Caltrans in retrofitting thousands of bridges. Part 1 is the text for this course and the notebook is intended to update and facilitate the manual's use. The manual recommends performance criteria according to bridge importance and anticipated service life, and seismic hazard level. Minimum recommendations are made for screening, evaluation, and retrofitting according to an assigned Seismic Retrofit Category. Various retrofit strategies are described and a range of related retrofit measures explained, including restrainers, seat extensions, column jackets, footing overlays, and soil remediation. The length of the course is one day. However, references to and materials from prior training developed by the MCEER team and authors and instructors are provided. Topics to be discussed include: Seismic and Geotechnical Hazards; Seismic Retrofit Procedures; Geotechnical Modeling; Seismic Evaluation Methods; Retrofit Details; Geotechnical Retrofit Strategies; methods of Analysis; Retrofit Applications; Design Examples. The course is intended for engineers from Departments of Transportation and consultants who have an interest in seismic retrofitting. Attendees are expected to learn about the behavior of bridges in earthquakes and methods for improving this performance. Emphasis will be given to older bridges typical of the central and eastern US. The pilot course is offered by Bridge technology to provide engineers with practical knowledge about current and emerging technologies and design procedures that will enhance their career skills, while improving the safety of our built environment from earthquakes and other hazards.
Author :
Publisher :
ISBN 13 :
Total Pages : 195 pages
Book Rating : 4.:/5 (233 download)
Download or read book Seismic Design Guidelines for Highway Bridges written by and published by . This book was released on 1981 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Thomas P. Murphy (Engineer)
Publisher :
ISBN 13 : 9780309481779
Total Pages : 75 pages
Book Rating : 4.4/5 (817 download)
Download or read book Proposed AASHTO Guidelines for Performance-based Seismic Bridge Design written by Thomas P. Murphy (Engineer) and published by . This book was released on 2020 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance-based seismic design (PBSD) for infrastructure in the United States is a developing field, with new research, design, and repair technologies; definitions; and methodologies being advanced every year. The TRB National Cooperative Highway Research Program's NCHRP Research Report 949: Proposed AASHTO Guidelines for Performance-Based Seismic Bridge Design presents a methodology to analyze and determine the seismic capacity requirements of bridge elements expressed in terms of service and damage levels of bridges under a seismic hazard. The methodology is presented as proposed AASHTO guidelines for performance-based seismic bridge design with ground motion maps and detailed design examples illustrating the application of the proposed guidelines and maps. Supplemental materials to the report include an Appendix A - SDOF Column Investigation Sample Calculations and Results and Appendix B - Hazard Comparison.
Author : Thomas P. Murphy (Engineer)
Publisher :
ISBN 13 : 9780309481779
Total Pages : 0 pages
Book Rating : 4.4/5 (817 download)
Download or read book Proposed AASHTO Guidelines for Performance-based Seismic Bridge Design written by Thomas P. Murphy (Engineer) and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance-based seismic design (PBSD) for infrastructure in the United States is a developing field, with new research, design, and repair technologies; definitions; and methodologies being advanced every year. The TRB National Cooperative Highway Research Program's NCHRP Research Report 949: Proposed AASHTO Guidelines for Performance-Based Seismic Bridge Design presents a methodology to analyze and determine the seismic capacity requirements of bridge elements expressed in terms of service and damage levels of bridges under a seismic hazard. The methodology is presented as proposed AASHTO guidelines for performance-based seismic bridge design with ground motion maps and detailed design examples illustrating the application of the proposed guidelines and maps. Supplemental materials to the report include an Appendix A - SDOF Column Investigation Sample Calculations and Results and Appendix B - Hazard Comparison.
