Author: Tom HoPublisher:
ISBN:
Category : Bridges
Languages : en
Pages : 196
Book Description
Seismic Retrofitting Guidelines for Complex Steel Truss Highway Bridges
Author: Tom HoSeismic Retrofitting Guidelines for Highway Bridges
Author: Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 205
Book Description
This document contains guidelines for the seismic retrofitting of highway bridges. The guidelines are the recommendations of a team of nationally recognized experts, which includes consulting engineers, academicians, state highway engineers, and federal agency representatives from throughout the United States. The guidelines are comprehensive in nature and embody several new concepts. An extensive commentary documenting the basis for the guidelines and a worked example problem illustrating their use are included. The guidelines include a preliminary screening procedure, methods for evaluating an existing bridge in detail, and potential retrofitting measures for the most common seismic deficiencies. These guidelines utilize many of the concepts presented in the "Seismic Design Guidelines for Highway Bridges" (Report No. FHWA/RD-81/081) and are intended to be used in conjunction with that document.
Seismic Retrofitting Manual for Highway Bridges
Author: Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 336
Book Description
This manual is an interim revision of the Federal Highway Administration (FHWA) publication "Seismic Retrofitting Guidelines for Highway Bridges", which was published in 1983 as report number FHWA/RD-83/007. It describes an evaluation procedure for retrofitting seismically deficient highway bridges and outlines various measures to upgrade these structures. The guidance provided in this manual is comprehensive in nature and nationally applicable to bridges in different seismic zones. It includes a revised preliminary screening procedure; two methods of detailed evaluation (which include the capacity/demand ratio method and the lateral strength method); and expanded sections on retrofit measures for bearings, columns, footings, foundations, and soils. A new section on the application of seismic isolation to bridge retrofit is also included. The manual is termed an interim revision because the subject matter is still evolving at this time.
Seismic Vulnerability and Retrofit Recommendations for State Highway Bridges
Author: Abdollah ShafieezadehPublisher:
ISBN:
Category : Bridges
Languages : en
Pages : 204
Book Description
Much of Utah's population dwells in a seismically active region, and many of the bridges connecting transportation lifelines predate the rigorous seismic design standards that have been developed in the past 10-20 years. Other states in the west have instituted seismic retrofit programs in response to damage to transportation networks in past California earthquakes. In a parallel report, seismic retrofit guidelines were developed for Utah based on the Seismic Retrofitting Manual for Highway Structures published by FHWA. In this report, representative case study bridges are evaluated in detail using the guidelines. The case study evaluations include the following for each bridge: 1- selection and presentation of analysis method, 2- development of numerical model in LARSA 4D and/or additional programs as needed, 3- evaluation of the seismic response of the unretrofitted bridge, 4- design of a possible retrofit scheme. The bridges evaluated include a four-span simply supported prestressed concrete girder bridge, a four-span continuous concrete T-beam, and an eight-span curved steel girder bridge with in-span pin and hanger joints.
Seismic Retrofit Measures for Highway Bridges
Author: Seismic Retrofitting of Highway Bridges
Author: United States. Federal Highway Administration. Office of Bridge TechnologyPublisher:
ISBN:
Category : Bridges
Languages : en
Pages :
Book Description
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.
Seismic Retrofitting Guidelines for Highway Bridges
Author: Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 205
Book Description
This document contains guidelines for the seismic retrofitting of highway bridges. The guidelines are the recommendations of a team of nationally recognized experts, which includes consulting engineers, academicians, state highway engineers, and federal agency representatives from throughout the United States. The guidelines are comprehensive in nature and embody several new concepts. An extensive commentary documenting the basis for the guidelines and a worked example problem illustrating their use are included. The guidelines include a preliminary screening procedure, methods for evaluating an existing bridge in detail, and potential retrofitting measures for the most common seismic deficiencies. These guidelines utilize many of the concepts presented in the "Seismic Design Guidelines for Highway Bridges" (Report No. FHWA/RD-81/081) and are intended to be used in conjunction with that document.
Prioritization of Bridges for Seismic Retofitting
Author: Stanford University. Department of Civil Engineering. Blume Earthquake Engineering CenterPublisher:
ISBN:
Category :
Languages : en
Pages : 170
Book Description
Seismic Retrofit Measures for Highway Bridges
Author: R. R. RobinsonPublisher:
ISBN:
Category : Bridges
Languages : en
Pages : 76
Book Description
Bridge Engineering
Author: W.F. ChenPublisher: CRC Press
ISBN: 1420039784
Category : Technology & Engineering
Languages : en
Pages : 479
Book Description
Mitigating the effects of earthquakes is crucial to bridge design. With chapters culled from the best-selling Bridge Engineering Handbook, this volume sets forth the principles and applications of seismic design, from the necessary geotechnical and dynamic analysis background to seismic isolation and energy dissipation, active control, and retrofit