Micropiles to the Rescue
When a Michigan energy concern began upgrading the equipment in one of its operating power plants, engineers were asked to find an economical and nondisruptive way to support the new loads...

Repairing Pittsburgh's Portal
Engineering the rehabilitation of Pittsburgh's Fort Pitt Bridge and Fort Pitt Tunnel involved an extensive inspection of their condition and a detailed evaluation of alternative...

Linking Past and Future
A superhighways spanning all of northern Greece - linking the port city of Igoumenitsa in the west to Turkey in the east - elevates an ancient trade route to modern design standards. Staggering...

Life-Cycle Environmental Accounting and Decision-Making for Bridge Structures
This presentation focuses on life-cycle environmental accounting and decision-making for bridge structures using the example of steel and steel-reinforced concrete....

A Tale of Two Towers: The Foundations
In preparing two lots in New York City's Times Square as sites for modern skyscrapers, engineers devised foundations and structural systems that would allow for subway lines,...

A Tale of Two Towers: The Structures
In preparing two lots in New York City's Times Square as sites for modern skyscrapers, engineers devised foundations and structural systems that would allow for subway lines,...

Poetic Crossing
Named for Georgia's first national poet, Sidney Clopton Lanier, the new Sidney Lanier Bridge, spanning the Brunswick River in the city of Brunswick, is an elegant structure...

Northern Exposure
Traffic growth on a Massachusetts highway leading to New Hampshire called for new lanes and replacement of all of the bridges. Wide medians aided the work; narrow ones complicated matters....

A New Identity
By repairing and relocating steel trusses, replacing deteriorating approach spans, and replacing what, at the time of its construction, was regarded as a daring concrete truss, engineers...

Bridge and Tunnel Security
The American Association of State Highway and Transportation Officials and the Federal Highway Administration recently convened a panel of esteemed researchers and experts in bridge and...

Outside the Box
Employing an innovative design that made construction quick and economical, the box girder structure carrying Highway N-2 over interstate 80 near Grand Island, Nebraska, became the first...

Bridge to the Future
The final component of Thailand's new Outer Bangkok Ring Road, the eight-lane cable-stayed Chao Phraya River Bridge, will not only alleviate Bangkok's notoriously...

Can Those Old Foundations Be Re-Used?

Scour: No. 1 Destroyer of Bridges

Overview of Long-Span Bridge Assessment History
This section gives a brief overview of long-span bridge assessment history. Also included are a few cases of long-span bridge failure and lack of assessment....

Review of Bridge Performance and Its Parameters
This section contains a review of bridge performance and its parameters. Topics include definition of lifetime performance and kinds of functioning for bridge performance....

Compiled Database on the Long-Span Bridges
This section briefly discusses the database that was created in order to establish the number and types of all the vital long-span bridges in the USA....

Delineation of Six General Performance Assessment Categories
This section delineates six general assessment categories for long-span bridges....

Performance Assessments of Other Essential Bridges
This section provides a brief statement on long-span bridges outside the scope of this study....

Main Conclusions and Recommendations
This section briefly comments on main conclusions and recommendations for engineering assessments of long-span bridges....

 

 

 

 

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