High-Performance Highway
Straightening and widening 118 mi (190 km) of state road 44 in northwest New Mexico in under three years required some innovative financing. Not only did the New Mexico State Highway and...
Cliff-Hanger
To create an arch bridge over a river gorge in Oregon without disturbing the canyon walls or floor below, engineers combined a segmental construction scheme with a temporary cable-stay...
Making the Most of HPC
Developing high-performance concrete (HPC) was only the first step toward bringing a material with improved durability, strength, constructability, and mechanical properties to the bridge...
A Grand New Bridge
Approximately 65 km south of Seoul, rising above the Asan Bay, the Seohae Grand Bridge now stands as the longest bridge in South Korea. The 9.4 km long cable-stayed bridge, which runs...
Out of the Way
The 0.9 mi (1.4 km) long Fort Washington Way was built in 1961 as a distributor for local downtown traffic. It quickly became a critical section of the region's Interstate...
Beltway Connection
The Woodrow Wilson Memorial Bridge carries the Capital Beltway (I-495) and a part of I-95�the main north�south interstate route on the East Coast�across the Potomac River south of Washington,...
Stronger Longer
Like many older concrete bridges, the Sierrita de la Cruz Creek Bridge, a 1957 crossing near Amarillo, Texas, suffered from concrete deterioration. When the Texas Department of Transportation...
Intermodal Innovation
A future application of magnetic levitation (maglev) technology could provide motorists with an alternative to congested freeways without requiring them to give up their automobiles. One...
Bell's Bridge Rehabilitation
Bell's Bridge carries Tidewater Drive, a major urban arterial in the City of Norfolk, Virginia, over Wayne Creek, a tributary of the Lafayette River. During a routine inspection in 1995,...
Seismic Design of Highway Bridges: Recommended Specifications
Under the AASHTO-sponsored National Cooperative Highway Research Program (NCHRP), a joint venture of the Applied Technology Council and the Multidisciplinary Center for Earthquake Engineering...
Magnetic Perturbation Imaging for Prestressed Concrete Evaluation
Many prestressed concrete bridge structures in the United States and other parts of the world are over thirty years old and have shown various signs of distress. Corrosion or fracture...
Cross-Frame and Diaphragm Behavior in Skewed Bridges
The author examines the existing specifications and guidance for bracing provisions by AASHTO, AISC, and TxDot, and the need for developing bracing requirements....
Maintenance of Diaphragm-Girder Connections
Fatigue cracking at diaphragm-girder connections and at similar connections of cross-frames and floorbeams have been common in steel highway bridges for the past 20 or 30 years. Fatigue...
High Performance Dampers for Bridges
A multi-disciplinary research study investigates the use of shape memory alloys as seismic dampers in bridges. Shape memory alloys are a class of alloys that display several unique characteristics,...
Seismic Analysis and Retrofit of the Amoskeag Bridges
In 1983 AASHTO first offered the design guide for seismic analysis of bridges, which ultimately became a permanent part of the AASHTO Bridge Design Manual in 1990. Prior to this time,...
Rehabilitation of the Packers Falls Bridge
The Packers Falls Bridge was constructed in 1912 and consists of a 42' (12.8m) single span, reinforced concrete arch structure. This bridge was constructed using a unique forming system...
Piece by Piece
The Lions' Gate Suspension Bridge, a landmark structure in Vancouver, British Columbia, marks the entrance to one of the busiest harbors on the west coast of North America....
Small Firms, Big Dig
The local knowledge and technical expertise found in small engineering firms are often critical to the success of large projects. As one of the most comprehensive design and construction...
Fast Forward
Under the aegis of the French government, the Soci�t� Nationale des Chemins de Fer Fran�ais (French National Railway Society), or SNCF, has built two new bridges, each approximately 1,100...
Holding Steady
The San Diego�Coronado Bay Bridge is an unmistakable landmark that frames the skyline of downtown San Diego, providing a vital link between the mainland and the Coronado peninsula. The...
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