Vol. 2, No. 4, pp. 374-388 (2006)
SEISMIC RETROFITTING OF HIGHWAY TRUSS BRIDGES
Charles Seim1; Phillip Yen2 and Jerome S. O'Connor3,*
1Consulting Engineer, San Francisco, CA 94111 USA, E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.
2Research Structural Engineer, Federal Highway Administration, 6300 Georgetown Pike, McLean,
YA 22101 USA, E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
3Senior Program Officer, Transportation Research, MCEER, University at Buffalo, State University of New York,
Buffalo, New York 14261 USA
*(Corresponding author:E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it. )
Received: 22 June 2005; Revised: 8 May 2006;Accepted: 10 May 2006
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ABSTRACT
This paper presents a summary of the recently released document entitled Seismic RetrofittingGuidelines for Complex Steel Truss Highway Bridges (referred to here as the Guidelines). The Federal HighwayAdministration (FHWA), commissioned MCEER (formally known as the Multidisciplinary Center for EarthquakeEngineering) to develop guidelines for seismic retrofitting of steel truss highway bridges as part of a larger researchproject. The Guidelines list various types and articulations of trusses and define bridgeperformance levels underthe actions of a lower-level (LL) and an upper-level (UL) earthquake. The Guidelines present methods ofstructural analysis, from simple linear-elastic to dynamic non-linear, time-history, to determine demand on thestructure. Methods are presented for determining the capacities of the truss members and there are severalexamples of retrofit strategies.
KEYWORDS
bridge, truss, retrofit, retrofitting, seismic
REFERENCES
[1] American Association of State Highway and Transportation Officials, ‘"Standard Specifications for Highway Bridges”, 17* Ed., 2002.
[2] Applied Technology Council, “Improved Seismic Design Criteria for California Bridges: Provisional Recommendations”, Report ATC-32, Redwood City, CA, 1996.