Seattle Solutions
Many of Seattle's most important bridges are vulnerable to serious damage if a much-anticipated big earthquake hits. A city-wide study designated lifeline structures for retrofitting,...
Calendar: Bridges 2000 Calendar
Featured bridges are: Mill Creek Park Suspension Bridge (OH); Coos Bay (McCullough Memorial) Bridge (OR); Gothic Arch (NY); Bidwell Bar Suspension Bridge (CA); Plaza de Espana (Spain);...
Putting Polystyrene to Work
Geofoam, the generic name for block or low density cellular plastic foam solids used in geotechnical applications, has low density and good insulation properties, which makes it well suited...
Rebuilding History
Deterioration of the second-oldest multiple-arch masonry viaduct in the country�in Canton, Mass.�threatened its ability to continue carrying Amtrak's Northeast Corridor trains,...
Riding the Rail
Spurred by decaying or overcrowded roads, communities across the U.S. are planning, building or renovating light rail, freight rail and high speed rail systems. The rail boom, funded in...
Bridge Within a Bridge
A multinational consortium retrofitted the Tagus River suspension bridge in Lisbon, Portugal. The retrofit included widening the roadway deck from five to six lanes, installing a railroad...
A Bridge Along the Same Lines
Engineers in Tennessee were recently charged with building a new viaduct in an old profile, while at the same time keeping headroom for the trains and keeping off the neighbors'...
Bridge Bashing
Ships can be dangerous to bridges. Collisions are increasing and costs are considerable. There are ways to reduce the risks, but these cost money, too. A 1993 vessel collision with and...
BART on a Roll
The San Francisco Bay Area Rapid Transit District (BART) opened its Pittsburg/Bay Point Station ahead of schedule, and now the district sets to work on an ambitious 14-mi rail system extension...
Catchy Culverts
Franklin County, Ohio, installed box culverts in Norman Ditch to prevent flooding of surrounding homes, streets and sewer lines after heavy storms. The design team, given tight deadlines...
Tracking Seismic Hazards
Union Station in downtown Portland, Ore. is a historic landmark but also a seismic risk. Engineers were charged with making a priority list of hazards so that the owners could prioritize...
Scandinavia's International Connection (Available only in Structural Engineering Special Issue)
The 7.8-km-long cable-stayed �resund Bridge, the centerpiece of the first road and rail link between Scandinavia and Europe, is the third and final link of the 15.8 km Oresund Link. The...
Lining the Line
Having succeeded in achieving dry stations and tunnels in mined construction, flexible waterproofing membranes are now being used to waterproof cut-and-cover subway stations and old, leaking...
Wetland Mitigation Evaluation Ten Years After Florida Keys Bridge Replacement
From 1912 to 1935, the Florida Keys were connected to the mainland by Henry Flagler's Overseas Railroad. The 1935 Labor Day Hurricane destroyed most of the railroad from Plantation...
Pipeline Crossings
Seeking Structural Solutions
A photo essay on the unique work of Santiago Calatrava, a Spanish-born engineer and architect whose bridges and buildings have attracted international attention for their unusual esthetics....
Making the Trains Run On Time
The Skokie, Ill. rail shops were constructed in 1928 and all cars in the Chicago Rapid Transit system are repaired and maintained at this yard. But as the cars have become more sophisticated...
Hong Kong Flies into the Future
Hong Kong's new airport, Chek Lap Kok, is scheduled to open in 1997. That is the year in which China takes over the government of Hong Kong from Great Britain. The airport,...
Forging the Link
The Southern California region is known as the freeway capital of the world. The transportation system has been based on the freedom of the individual automobile for more than 25 years....
Bridge Design: Reality Bites Back
Many bridge engineers tend to ignore the process nature of reality, the fact that everything in this universe changes from moment to moment. When they are given the responsibility for...
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