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MCEER Bulletin, Volume 21, Number 1, Spring 2007

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Volume 21, Number 1, Spring 2007

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New Bridge Reports Showcase State-of-the-Art Research

Over the past decade, MCEER has carried out a research program on the design and retrofit of bridges and highway structures. This research, sponsored by the Federal Highway Administration (FHWA) and overseen by FHWA technical representatives John O’Fallon and Phillip Yen, has led to the publication of several new manuals and guidelines, all available from MCEER. Topics include improved seismic design, evaluation and retrofit methodologies, and strategies for new and existing bridges and other highway structures.

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Seismic Retrofitting Guidelines for Complex Steel Truss Highway Bridges, by T. Ho, R. Donikian, T. Ingham, C. Seim and A. Pan (MCEER-06-SP05), presents the state of the practice, through 2005, for retrofitting steel truss bridges in the US. A performance-based seismic retrofit philosophy is used. The guidelines cover all major aspects pertinent to the seismic retrofitting of steel truss bridges, with a focus on superstructure retrofit. Case studies are provided. These guidelines are a supplement to the 2006 FHWA Seismic Retrofitting Manual for Highway Structures for “unusual or “long span” steel trusses.

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Seismic Isolation of Highway Bridges, by I.G. Buckle, M. Constantinou, M. Dicleli and H. Ghasemi (MCEER-06-SP07), presents the principles of isolation for bridges, develops step by step methods of analysis, explains material and design issues for elastomeric and sliding isolators, and gives detailed examples of their application to standard highway bridges. The manual is a supplement to the Guide Specifications for Seismic Isolation Design published by AASHTO in 1999.

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REDARS 2: Methodology and Software for Seismic Risk Analysis of Highway Systems, by S.D. Werner, C.E. Taylor, S. Cho, J-P. Lavoie, C. Huyck, C. Eitzel, H. Chung and R.T. Eguchi (MCEER-06-SP08), provides the basic framework and a demonstration application of the Seismic Risk Analysis (SRA) methodology and its modules. The main modules of the REDARS 2 SRA methodology include hazards, components, system and economic. The northern Los Angeles, California highway system is used as a demonstration application of the SRA methodology.

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Order Parts 1 and 2 together
and save 10%


Seismic Retrofitting Manual for Highway Structures, Part 1 – Bridges, by Ian G. Buckle (lead author), Ian Friedland, John Mander, Geoffrey Martin, Richard Nutt and Maurice Power (MCEER-06-SP10), provides procedures for screening, evaluating, and retrofitting highway bridges. The manual introduces a performance-based retrofit philosophy similar to that used for the performance-based design of new buildings and bridges. It extends the guidance provided in the earlier FHWA manuals (originally issued 1983 and updated in 1995), based on recent experiences in California, Japan, and other countries, as well as the results of comprehensive research programs that have been sponsored by FHWA, MCEER, Caltrans, and other agencies.

Seismic Retrofitting Manual for Highway Structures, Part 2 - Retaining Structures, Slopes, Tunnels, Culverts and Roadways by Maurice Power (lead author), Kenneth Fishman, Rowland Richards, Faiz Makdisi, Samuel Musser and T. Leslie Youd (MCEER-06-SP11), includes new procedures for determining the seismic vulnerability of other important highway system structures, namely, retaining structures, slopes, tunnels, culverts, and roadways. Guidance is provided on screening for potential seismic vulnerabilities; conducting a detailed evaluation; and describing strategies for retrofit design. In addition, discussion is provided for classifying each structure by type, construction, or expected performance.

The Seismic Retrofitting Manuals are also available from the Federal Highway Administration.