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A new study shows health disparities cost Texas billions of dollars; Senate rejects impeachment articles against Mayorkas, ending trial against Cabinet secretary; Iowa cuts historical rural school groups.

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The Senate dismisses the Mayorkas impeachment. Maryland Lawmakers fail to increase voting access. Texas Democrats call for better Black maternal health. And polling confirms strong support for access to reproductive care, including abortion.

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Rural Wyoming needs more vocational teachers to sustain its workforce pipeline, Ohio environmental advocates fear harm from a proposal to open 40-thousand forest acres to fracking and rural communities build bike trail systems to promote nature, boost the economy.

UNR Test Bridge Withstands Massive Simulated Earthquake

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Wednesday, February 11, 2015   

RENO, Nev. - An experimental bridge at the University of Nevada-Reno recently withstood a simulated earthquake more than twice as powerful as the Northridge quake that struck Los Angeles in 1994.

Saiid Saiidi, a civil-engineering professor at the university's Earthquake Engineering Laboratory, said the goal of the research is to build bridges that can be used after a major earthquake.

"Just picture having a strong earthquake in San Francisco, and 20 or 30 bridges collapse; then the city will come to a standstill," he said. "So it's not just saving lives during the earthquake on the bridge, it's what happens afterward."

Saiidi said his test bridge has columns made of nickel, titanium, aluminum and copper, which can be distorted about 20 times as much as the steel components used in conventional construction. What he called shape-memory alloys allow the bridge to shift and return to its original position in earthquakes as powerful as magnitude 7.5 and higher.

Saiidi said his research is leaving the laboratory and being used in the construction of a bridge in downtown Seattle.

"The Federal Highway Administration, once they found out about the research, and the Washington Department of Transportation, they said, 'Well, let's try to do this. Put in an actual bridge and showcase it for the whole country to see,' " he said.

Saiidi said the project is scheduled to break ground next month - the first time any shape-memory alloys have been used in any bridge project in the United States. Saiidi said building bridges using his research costs about 5 percent more than conventional steel-and-concrete construction.


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