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...
A Framework for Performance-Based Seismic Design
The following probabilistic framework for seismic performance assessment is presented as an effective foundation for the development of performance-based guidelines. It suggests a generic...
Blast Mitigation Research and Technology Transfer
Terrorists continue to use bombs as a weapon of choice. Recent bombings targeted against the United States, such as the World Trade Center, Murrah Federal Building, Khobar Towers, and...
High Resolution Pressure Measurements on Roofs of Low Buildings
Describing an instrumented module which was built with extremely high pressure tap density to use as a component of a roof or wall....
Update of Serviceability Design Considerations for Low-Rise Steel Buildings
In 1990, the American Institute of Steel Construction published Servicability Design Considerations for Low-Rise Buildings by James M. Fisher and Michael A. West. This document was published...
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,...
Evolution of Composite Floor Systems in the United States
Composite floor systems, which combine structural steel beams with a cast-in-place concrete slab, have grown in popularity in the U.S. during the past 40 years. In most early applications,...
Returning to the Source
One hundred years ago, Las Vegas was a dry, dusty dot on the map with a population of only 100. The city grew up to become perhaps the gambling capital of the world, and more recently...
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...
Mile High Design
Denver's hybrid steel and concrete Invesco Field at Mile High, the National Football League's first design/build stadium, is on schedule to replace the existing...
High-Tech Isolation
In the fast-paced world of telecommunications, the time to market is often the deciding factor in the success of an enterprise. With that thought in mind, AboveNet Communications, Inc.,...
The Pentagon Project
The renovation of the Pentagon, now under way, is one of the most ambitious, complex, and challenging construction undertakings in contemporary history. It entails the equivalent of demolishing...
Turning with the Wind
A 125-m high tower built at the site of the Glasgow Science Center in the United Kingdom required some innovative design methods. To reduce the aerodynamic effects imposed on the slender...
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...
Sharp Curves
In Madison, Mississippi, just north of Jackson on Interstate 55, a diamond interchange with State Route 463 has become a bottleneck for commuters and local motorists. But the typical solution�a...
Competitive Edge
A new design system called the simplified economical bridge design (SEBD) makes steel cost-competitive with concrete for short- and medium-span bridges for the first time. In fact, a comparative...
Replacement Strategy
Water Works II, a $275-million water treatment plant currently under construction in Detroit, is redefining the way that such projects are let and built. In 1980 the city initiated a program...
Great Excavations
By any definition, the scale of the underground caverns being excavated near Geneva at the particle physics center run by the Conseil Europ�en pour la Recherche Nucl�aire (CERN)�the European...
Concrete Delivers
The latest addition to the skyline of Shanghai, China, is a strikingly slender all-concrete 62-story office tower. It is the city's tallest all-concrete building, achieving...
Native American Imprint
Following a design phase of more than four years, construction has finally begun on the Smithsonian Institution's National Museum of the American Indian, which will occupy...
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