期刊
JOURNAL OF BRIDGE ENGINEERING
卷 9, 期 5, 页码 464-U1出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)1084-0702(2004)9:5(464)
关键词
Earthquakes; Bridges, steel; Bridges, girder; Bridge construction; Bearing capacity; Seismic response; United States
资金
- National Science Foundation under (Mid-America Earthquake Center) [EEC-9701785]
The seismic response of typical multispan simply supported (MSSS) and multispan continuous steel girder bridges in the central and southeastern United States is evaluated. Nonlinear time history analyses are conducted using synthetic ground motion for three cities for 475 and 2,475-year return period earthquakes (10 and 2% probability of exceedance in 50 years). The results indicate that the seismic response for the 475-year return period earthquake would lead to an essentially linear response in typical bridges. However, the seismic response for a 2,475-year return period earthquake resulted in significant demands on nonductile columns, fixed and expansion bearings, and abutments. In particular, pounding between decks in the MSSS bridge would result in significant damage to steel bearings and would lead to the toppling of rocker bearings, which may result in unseating of the bridge deck.
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