Risk in Geotechnical Practice: Unraveling Foundation Uncertainty
Statistical Analysis Offers a Rational Approach for Controlling Foundation Risk in Design-Build Projects. For the past 20 years, design-build (DB) procurement has become the default for many transportation...

Strengthening Connections
China’s Hong Kong–Zhuhai–Macao Bridge is the world’s longest sea crossing. It promotes connectivity in a fast-growing region, significantly cutting journey times in what is known as the Greater Bay Area....

Enhanced Entrance
A new, smaller road, together with an improved entrance plaza and pathways, helped revitalize key areas within Niagara Falls State Park—despite the repeated discovery of underground contamination and other...

Double Duty: Approach Structures
The new Sarah Mildred Long Bridge, which connects the cities of Kittery, Maine, and Portsmouth, New Hampshire, features precast, posttensioned concrete, segmental box girder approaches in a stacked configuration...

Saying Goodbye to the Tappan Zee
On October 6, 2017, the 3 mi long, 90 ft wide Governor Malcolm Wilson Tappan Zee Bridge, which connected the counties of Rockland and Westchester in New York State, was retired after more than 60 years...

A Landmark's Legacy

Reliability-Based Design (RBD) For Everyone: (No Monte Carlo Simulation Required!)
In North America, the design of earth structures for transportation applications is most often carried out using load and resistance factor design (LRFD). In the U.S., the AASHTO LRFD Bridge Design Specifications...

Connecting Continents: Challenges of the Eurasia Tunnel in Istanbul
The Eurasia Tunnel, the first bored tunnel crossing of the Istanbul Strait (Bosphorus) in Istanbul, Turkey, is a site that presents many unique challenges, including very poor ground conditions, unusually...

Design Details
In all projects, the interconnectivity of each component is important. A movable bridge is an especially complicated structure that is exposed to an array of dynamic movements and transient loading conditions...

An Unknown-Unknown Does In An Overpass: A Soil Stockpile on Soft Clay Is Too Much for a Bridge in Canada
Like most structures, bridges are designed for an array of loading conditions. Some loads are known or can be reasonably estimated with confidence (i.e., known-knowns, such as structure dead and vehicular...

The State of Soil Improvement in China: The G-I Soil Improvement Committee’s China Scan Tour
During the last four decades, China has made significant improvement in various sectors of its infrastructure, including high-speed railways, long-span and cross-sea bridges, large dams, long- and large-diameter...

Crossing Grand Canyon: The Kaibab Trail Suspension Bridge
Recently named a national historic civil engineering landmark in ASCE's Historic Civil Engineering Landmark Program, the 1928 Kaibab Trail Suspension Bridge proved uniquely challenging to access, spanning...

Next-Generation Drones Bolster Bridge Inspections
A preflight, flight, and postflight drone system saves time and money in bridge inspections. It can also create a digital "twin" of bridges....

Next-Generation Sonar Improves on Best Existing Technology
A sonar system capable of visualizing underwater environments in real time can be used for underwater bridge inspections and other construction-related tasks....

Tied Together
The replacement of the John Greenleaf Whittier Memorial Bridge was one of the signature projects of the Massachusetts Department of Transportation's $3-billion accelerated bridge construction program....

Uplifted
The new Fore River Bridge, near Boston, leaves more room vertically and horizontally for passing ships, and its lift towers employ several cost-saving innovations....

Originality Built In
The new Goethals Bridge linking New Jersey and New York is a twin cable-stayed crossing that incorporates an innovative cable-stayed anchor in its towers, which angle outward to keep melting ice off the...

Arena of Books
The new Qatar National Library features a folded design with cantilevered corners on the exterior, while inside, an enormous single space for reading or socializing offers terraces stacked with bookshelves....

Force of Nature: The Boundary Layer Wind Tunnel Laboratory
The Boundary Layer Wind Tunnel in Ontario, Canada, pioneered the field of wind engineering and improved a generation of thin and light bridges and towers....

Designed for Durability
The Marc Basnight Bridge, completed in February, carries North Carolina Highway 12 over the Oregon Inlet, an area that is one of the most dynamic and dangerous inlets on the Atlantic Coast. At 2.8 mi long,...

 

 

 

 

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