Replacing an 80-year old, two-span, filled-concrete arch structure with a 230-ft-long pre-stressed concrete beam bridge with an arch facade was challenging from the outset.
Field tests of a high-speed video system that reveals distortion by exaggerating tiny deflections show promise as the basis for a new, flexible and relatively inexpensive structural health analysis tool.
More than half of Oregon’s state highway system bridges—that’s more than half of the 2,700 bridges the state department of transportation owns, not even counting the other 4,000 owned by cities and counties—were built in the 1950s and 19060s.
A newly constructed bridge deck built as part of the 91 Freeway Project in Corona, Calif., will be demolished and rebuilt amid concerns about possible damage associated with an Oct. 9 incident that injured nine workers.
The Ohio Dept. of Transportation completed the state’s first slide-in bridge project on Oct. 17-18, although on a somewhat different schedule following the discovery this summer of excess camber in two precast-concrete beams.
The value of new construction starts in September dropped 5% from the previous month but show an annual gain of 12%, according to Dodge Data & Analytics.
New York State officials have apparently selected a Fluor Corp.-led team to continue negotiations for the contract to design and build the replacement Tappan Zee Bridge across the Hudson River, an estimated $5.2 billion-contract, according to several industry sources close to the competition and a published report.
