SEISMIC RETROFIT OF 1958 CARQUINEZ BRIDGE
The 1021-m (3,350-ft) long steel through truss bridge carrying the eastbound lanes of Interstate 80 across the western end of the Carquinez Strait about 40 km (25 mi) north of San Francisco opened to traffic in 1958. It was the first major highway bridge in the United States to use high-strength (T1) steel, the first to use welded built-up members, and the first to use high-strength bolted connections. These "firsts", combined with the size of the bridge and the traffic demands, presented a formidable challenge to the retrofit design team. The retrofit objective was to prevent collapse of the bridge during an earthquake with an expected mean return period in the range of 1,000 to 2,000 years. Under this noncollapse criterion, significant damage to the bridge, such as yielding and buckling of members, was considered acceptable. It was important, then, that a measure of acceptable damage be defined and that the postyield behavior of the structure be both very predictable and very ductile. A preliminary design was prepared based on an elastic analysis with geometric nonlinearities. The retrofit design was then examined by incorporating material nonlinearities into the model; adjustments to the retrofit design were required in some isolated areas. Design issues that the team addressed included connections for loads as high as 60,050 kN (13,500 kips); local buckling of thin-walled, high-strength members; postyield behavior of major load-carrying steel members; rocking of rigid A-frame tower assemblies; and an expansion joint for a 2.4-m (8-ft) movement rating.
- Record URL:
- Summary URL:
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309064694
-
Supplemental Notes:
- This paper appears in Transportation Research Record No. 1624, Structural Analysis and Design: Bridges, Culverts, and Pipes.
-
Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Hinman, J
- Toan, V
- Thoman, S
- Publication Date: 1998
Language
- English
Media Info
- Features: Figures; References;
- Pagination: p. 54-63
-
Serial:
- Transportation Research Record
- Issue Number: 1624
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Bolts; Earthquake resistant design; Elastic analysis; High strength steel; Metal bridges; Nonlinear systems; Retrofitting; Steel bridges; Truss bridges; Welds
- Uncontrolled Terms: Nonlinearity
- Geographic Terms: California
- Old TRIS Terms: Elastic analysis (Structural); High strength bolts
- Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;
Filing Info
- Accession Number: 00756072
- Record Type: Publication
- ISBN: 0309064694
- Files: TRIS, TRB
- Created Date: Nov 2 1998 12:00AM